١ / ٩٠
Tender Documents for TABRIZ Thermal Power Plant
6 KV Switchgear Related to Unit I
Technical Specification & Schedules for
MEDIUM VOLTAGE SWITCHGEAR
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Table of Content
Section 1 - Summery of Work 4
Section 2 – General Requirements 12
Section 3 - MEDIUM VOLTAGE INDOOR SWITCHGEAR 29
Section 4 - CONTROL & PROTECTION 49
SCHEDULE OF TECHNICAL INFORMATION TABLES 77
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SPECIFICATION
SECTION 1 - SUMMARY OF WORK
SPECIFICATION
SECTION 1 - SUMMARY OF WORK
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١١. MAJOR EQUIPMENT REQUIREMENTS
Table No. 1-1, 1-2 & 1-3 list major equipment requirements for
switchgear forming part of the works.
١٢. HANDLING FACILITIES, TRANSPORT LIMITATION
The Contractor is solely responsible for proper design and safe
transport of the equipment. He should carefully check the selected
routes, clearances and bearing capacities of tunnels and bridges at
the design stage and at the time, the shipment planned. Transport of
materials and equipment from port(s) of entry to the site as well as
outside of Iran shall be under the Contractor responsibility.
The Contractor shall ensure that all materials and items included
in the works are adequately packed for transport by sea, rail and
roads, that protection is provided against corrosion, physical
damage, contamination, water damage and damages due to climatic
conditions or any other source that may be encountered during
handling, transport and storage. Packing material and cases shall
remain under the property of the Owner.
The Contractor shall make all necessary arrangements for custom
clearances in Iran, in country of origin and in any country through
which the transport may be routed. The Engineer shall be immediately
informed if any item has not arrived when expected.
The Contractor shall obtain all the necessary import and export
permits as well as any other documents required for transportation.
Copies of all forms and documents relating to customs, permits,
packing lists, bills of lading, insurance etc. shall be forwarded to
the Engineer.
All labels, marking and coding on boxes, crates and containers
shall be clear, legible waterproof, not affected by sunlight and
shall be securely fixed or painted. Standard markings shall be
applied, i.e. "Lift here", "No hooks", "Fragile", "This side up",
"Instruments", etc. Crates containing oil-filled apparatuses, such
as current transformers, shall be clearly marked with limits of
inclination during any phase of the transport and handling. Oil,
paints and other inflammable materials shall be clearly marked,
including recommended storage temperatures.
Shipping reports shall be submitted to the Engineer for all
shipping of equipment. The report shall include weights, shipping
dimensions and parcel numbers. Parcel numbers shall be unique and
sequentially assigned for all parcels of the entire Contract. In the
shipping report, the contents of each parcel shall show full details
of inscriptions outside all packages or containers.
٥ / ٩٠
Custom offices at points of entry in Iran shall be informed in
advance of the size and quantity of packages, origin and
destination, the name of the Owner and carrier and expected date of
arrival.
Approved impact recorders shall be provided in every power
transformers consignment and in all carriages containing circuit
breakers, current and voltage transformers to indicate if unduly
rough handling has occurred after final factory inspection. Upon
arrival, impact recorders shall be inspected by the Engineer.
١١٠. SPARE PARTS
The Tenderer must state the spare equipments, parts and renewal
items, which he deems necessary for the first five years normal
service operation of the substation. The renewal parts and spare
equipments shall include common maintenance accessories of which the
Tenderer shall give a list. The spare parts and equipments shall be
quoted for with quantities and unit prices in the unit lists for the
spare parts.
SPECIFICATION
SECTION 1 - SUMMARY OF WORK
٦ / ٩٠
Table 1-1 Major Equipment Requirement for TABRIZ Power Plant
6 KV Switchgear Related to Unit I
Equipment Quantity
١. Circuit breaker (three phase):
a) 2500 A 6+1(Spare)
b) 1250 A 3+1(Spare)
c) 630 A 14+1(Spare)
٢. Current transformers (single phase): 67
٣. Voltage transformers (single phase): 21
٤. Protective relays: 26 (Minimum Requirement)+ 5(Spare)
٥. Programmable Logic Control: 2(Change Over)+1(Spare)
٦. Core balance current transformers 17
SPECIFICATION
SECTION 1 - SUMMARY OF WORK
٧ / ٩٠
Table 1-2 Major Equipment Requirements for TABRIZ Power Plant
6 KV Switchgear Related to Unit I
Function Type Qty. Core Balance CT
9LTA / 9LTB Incoming 2 2500 A 40 KA 3φ - 2000 / 5 A - 5P15 - 30 VA 3φ - 2000 / 5 A - 0.2FS5 - 30 VA ---
LTS Incoming 2 2500 A 40 KA 3φ - 2000 / 5 A - 5P15 - 30 VA 3φ - 3300 / 5 A - 5P20 - 30 VA 3φ - 2000 / 5 A - 0.2FS5 - 30 VA ---
LGA / LGB Coupling 2 2500 A 40 KA 2φ - 2000 / 5 A - 5P15 - 30 VA --- --- ---
Potential Cell --- 2 --- --- --- --- --- ---
FYA (GRF) Outgoing 1 630 A 40 KA 2φ - 200 / 5 A - 5P15 - 15 VA 1φ - 200 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x150)
LKS (T) Outgoing 2 630 A 40 KA 2φ - 250 / 5 A - 5P15 - 15 VA 1φ - 250 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x150)
LKQ (P) Outgoing 2 630 A 40 KA 2φ - 400 / 5 A - 5P15 - 15 VA 1φ - 400 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x240)
ABP (CP) Outgoing 2 630 A 40 KA 2φ - 150 / 5 A - 5P15 - 15 VA 1φ - 150 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x150)
CRF (CWP) Outgoing 2 630 A 40 KA 2φ - 400 / 5 A - 5P15 - 15 VA 1φ - 400 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x240)
FFA (B) Outgoing 2 630 A 40 KA 3φ - 500 / 5 A - 5P15 - 15 VA 2φ - 500 / 5 A - 5P15 - 15 VA 1φ - 500 / 5 A - 0.5FS5 - 15 VA BTF 200R , r=25 , 2x(3x150)
AHP (FWP) Outgoing 3 1250 A 40 KA 3φ - 750 / 5 A - 5P15 - 15 VA 2φ - 750 / 5 A - 5P15 - 15 VA 1φ - 750 / 5 A - 0.5FS5 - 15 VA BTF 200R , r=25 , 2x(3x150)
FPC (BCP) Outgoing 3 630 A 40 KA 2φ - 75 / 5 A - 5P15 - 15 VA 1φ - 75 / 5 A - 0.5FS5 - 15 VA --- BTF 100R , r=25 , 1x(3x150)
Total Cell No.: 25
All equipments and components of switchgear must be offered from following suppliers:
Protective relays: SIPROTEC 5 Series made by SIEMENS company - Each protective relay must be having an Ethernet port support DIGSI 5 & IEC61850/Goose protocols.
Breakers: VP4 E Series made by PARSSWITCH company.
Trip, Lockout & TCS relays: SIEMENS company products - Test block: MMLG Series made by AREVA / 2RMLG Made By Siemens
Auxiliary relays: Finder (Italy) / Schrack (Austria) - Terminal: RAAD company products.
CT & PT: In order of preference: Nirou Trans / MAG Electric / PARSSHAR company products - Measuring devices: Ziegler company products
Change over system based on PLC S7 (Siemens) should be considered in each potential cell and 125 VDC supply systems. (Related logic will be given)
CT 's (Phase(s), Accuracy Class, Nominal Burden)CB (Ir, Isc (1Sec.))
Price should be given for each item individually.
Site visit is obligatory before giving technical offer & financial proposal.
Cubicles and all parts must be guarantee for a year after first energization and after sale service for 5 years is undertaken.
SPECIFICATION
SECTION 3 - SUMMARY OF WORK
٨ / ٩٠
Table 1-3 Major Equipment Requirements for TABRIZ Power Plant
6 KV Switchgear Related to Unit I (Continue from previous page)
Function PT 's Measurements Cubicle Dimensions (W x H x D) (cm)
9LTA / 9LTB 3φ - 6000/√3 / 100/√3 V - 0.5 / 3P - 50 VA 64-50-51 --- --- 25 1V (Selector) - 3A 120 x 235 x 200
LTS 3φ - 6000/√3 / 100/√3 V - 0.5 / 3P - 50 VA 64-50-51 --- --- 25 1V (Selector) - 3A 120 x 235 x 200
LGA / LGB 3φ - 6000/√3 / 100/√3 V - 0.5 / 3P - 50 VA 1 51 --- --- 27-59
1 --- 120 x 235 x 200
Potential Cell 3φ - 6000/√3 / 100/√3 V - 0.2 / 3P - 50 VA --- --- --- 27-59 1V (Selector) 60 x 235 x 200
FYA (GRF) --- 50-46-49 --- --- 64 1A 60 x 235 x 165
LKS (T) --- 50-51 --- --- 64 1A 60 x 235 x 165
LKQ (P) --- 50-51 --- --- 64 1A 60 x 235 x 165
ABP (CP) --- 50-46-49 --- --- 64 1A 60 x 235 x 165
CRF (CWP) --- 50-46-49 --- --- 64 1A 60 x 235 x 165
FFA (B) --- 87 50-46-49 --- 64 1A 60 x 235 x 200
AHP (FWP) --- 87 50-46-49 --- 64 1A 60 x 235 x 200
FPC (BCP) --- 50-46-49 --- --- 64 1A 60 x 235 x 165
1: Only for coupling from 1LGA
Each cell equipped with earth switch (except coupling cells) interlocked with its associated breaker to prevent grounding into live circuit.
Bus bar should be uniform along its length. (2500 A, 40 KA, 1 Sec.)
Supply & Control voltage of cubicles 125 VDC
Input Control signals voltage 48 VDC
Heat & Lighting voltage 230 VAC
Each cell equipped at least with nine point arc flash protection and three area arc flash protection (Related Bus bar Section, Breaker Compartment and Cable Connection Section)
Protective relay functions
Each cell equipped with voltage indicator & capacitive insulator.
Layout restrictions must be considered in design & installation
SPECIFICATION
SECTION 3 - SUMMARY OF WORK
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SPECIFICATION
SECTION 1 - SUMMARY OF WORK
١٠ / ٩٠
TABLE 2 – SCHEDULE OF TIMINGS
No.
Day
Description
Design, Construction,
Packing and Delivery
45 days
Installation &
Commissioning
15 days
1
TABRIZ Thermal Power
Plant
6 KV Switchgear
Related to Unit I
Design, Construction,
Packing, Delivery,
Installation &
Commissioning
١١ / ٩٠
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٢ / ٩٠
2. GENERAL REQUIREMENTS
٢١. DELIVERY
Material and equipment delivery shall only take place after
approval of sources has been granted and inspection performed as
detailed in articles 8 and 9 of this section and performance of the
followings:
a) The Contractor specification covering packing, shipping, storage
and markings used by manufacturers, suppliers and shippers.
b) The Contractor shall be responsible for proper and safe handling
and storing up to the point of delivery at the site and duration
erection until provisional Taking over .Storing shall be done in
a manner preventing losses. All parts shall be clearly marked to
facilitate easy storing.
c) The Contractor shall properly group the smaller objects and
equipment for indoor installation. Sensitive electronic
equipment (e.g.: relay cubicles) shall be delivered at site with
advance notice of such deliveries to the Owner in order to store
the said equipment in protected buildings. Indoor equipment with
epoxy resin or equal insulation shall not be left under direct
95
d) The Contractor shall ensure that a sufficient number of vehicles
are present at site to facilitate proper unloading of materials
and equipments.
e) Each substation equipment shall be packed separately and marked
distinctly and clearly, so that mix-up with other substation
equipment is prevented.
f) Crates and containers shall be provided to make handling and
storing safe and secure.
Crates and containers shall be clearly marked with total weight,
included items, Contract number and port of destination.
g) Erection Marks Before leaving the Contractor's works, all
apparatus and fittings shall be painted or stamped at least in
two places with distinguishing number and/or letter,
corresponding to the distinguishing number and/or letter
appearing on an approved drawing and material list.
The erection marks on galvanized material shall be stamped
before galvanizing and shall be clearly legible after
galvanizing.
All markings shall be legible and weatherproof. Where tags are
used, they shall be durable, securely attached and duplicated.
h) The documents outlined in section 3 (submittals) shall be
delivered by the Contractor during the execution of the works in
a manner and timetable best suited for the orderly and timely
progress of the works. The details shall be worked out during
the Contract negotiations.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٣ / ٩٠
٢٢. ACCOUNTS AND RECORDS
The Contractor will keep accounts and records in such form and
detail as shall be satisfactory to the contractor and furnish
contractor or his authorized representative(s) with all such
information about accounts as he or they may require.
٢٣. STANDARDS
The latest editions of all standards and codes mentioned in this
specification shall govern, unless the year of publications is
given. Standards and codes of other origin may be substituted
provided:
(a) The technical requirements given in the respective detailed
descriptions of work of this specification are met.
(b) In the event of conflict, the standards and codes of this
specification shall govern.
(c) One copy in English of the standards and codes substituted shall preferably accompany the Tender information, but shall in any
case be provided to the Engineer not more that 14 days after the
Contract award.
The following is a list of the agencies whose standards and codes
are used in this document:
١. Standards of the American national standards institute (ANSI).
٢. Standards of the American society for testing and materials
(ASTM).
٣. Standards of the insulated power cable engineers association
(IPCEA).
٤. Standards of the American institute of steel construction
(AISC).
٥. Standards of the national electrical manufacturers association
(NEMA).
٦. Standards of the British standards institute (B.S.).
٧. Steel structures painting council (S.S.P.C).
٨. American welding society (AWS).
٩. Institute of electrical and electronic engineers (IEEE).
١٠. International electro technical commission (IEC).
١١. Institute of standards and industrial research of Iran (ISIRI).
١٢. Deutsche industrie norm (DIN).
١٣. British electricity boards standards (BEBS).
١٤. Office of Deputy for Strategic Supervision Bureau of Technical
Execution System.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٤ / ٩٠
٢٤. TRADE NAME MATERIALS AND EQUIPMENT, AND ALTERNATIVES
Certain materials and equipment to be incorporated in the work
may be designated on the Contract drawings or in the specification
by a trade name or the name of a manufacturer and his catalogue
information. Upon the Contractor's written request, and subject to
the following requirements, the Engineer will approve the use of
alternative materials or equipment, if he is satisfied that the
alternative is of equal quality to the item specified and of the
required characteristics for the purpose intended. Such approval
will be given in writing.
The burden of proof as to the comparative quality and suitability
of alternative materials and equipment shall be upon the Contractor.
He shall furnish with his request to use an alternative, six (6)
copies of complete data thereon, including descriptions and
performance data showing its equality to the item specified.
Thereafter, he shall furnish such other pertinent information as may
be requested by the Engineer. The Contractor's request and
accompanying data shall be submitted in sufficient time to permit
approval action without delaying the work. If such request is
disapproved, the Contractor shall not ask or be permitted to use the
same alternative materials or equipment in modified form.
The Contractor shall bear the total cost of all necessary
modifications to the works arising as a result of substituted
materials or equipment.
No payment over and above the prices in the Schedule of Prices
will be made to the Contractor because of his use of substituted
materials or equipments.
٢٥. ENVIRONMENTAL REQUIREMENTS
Materials susceptible to deterioration from climatic conditions
or subject to the formation of fungus or any other form of parasitic
life shall preferably be eliminated but if used must be permanently
protected. Where such materials cannot be eliminated or permanently
protected, the Contractor shall apply a suitable surface treatment
to protect the equipment for a minimum period of 24 months. The
Contractor shall state the period of protection and specify
treatment procedures and the recommended intervals between
retreatment.
Untreated organic materials, such as cotton, paper, or wood shall
not be used. Operating coils of relays and meters shall be
impregnated with a fungus inhibiting varnish. Marking strips and
nameplates shall be of plastic laminate or anodized aluminum. Paper
labels shall not be used.
Doors of panels shall be close fitting and ventilating openings
shall be suitably screened to prevent entrance of insects, rodents
and dust.
All cable entrances to equipment shall be tightly sealed with
gland plates.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٥ / ٩٠
Prior to shipment, surfaces of wiring and all other parts
susceptible in any way to moisture absorption or fungus attack shall
receive treatment with fungicidal varnish.
Each cabinet or cubicle, indoor or outdoor, containing electrical
equipment shall be provided with a manually and thermostatically
controlled heater to combat moisture condensation and with a light
fixture. The heaters shall be located such that there is effective
ventilation and local overheating is avoided.
All instruments shall be adequately tropicalized.
٢٦. ENVIROMENTAL DATA
Typical meteorological data for locations adjacent to the
Contract sites are tabulated below for information only. More
detailed data may be obtained from the Iranian ministry of roads,
meteorological department.
TABLE 2-6-1 METEROLOGICAL INFORMATION
DISCRIPTION
Tabriz Power Plant
(a) Elevation of the site above sea level
m 1300
(b) Air temperature
- absolute max (year) °C +40
- absolute min (year) °C -25
(c) Avg. Relative humidity
- max (year)% 90%
- min (year)% 50%
(d) Percipitation total per year mm -
(e) Wind velocity m/s -
(f) Seismic withstand factor (surface acceleration)
0.35g
(g) Max Ice thickness mm -
(h) Solar radiation -
(i) Pollution degree (25cm/kV)
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٦ / ٩٠
٢٧. PROTECTION
٢٧١. General
The minimum surface protection shall be one coat of red lead iron
oxide primer in accordance with SSPC paints 6-64T applied to produce
dry film thickness of not less that 40 microns.
٢٧٢. Surface Preparation for Protective Coating
All surfaces shall be cleaned in accordance with the steel
structure painting council specification SSPC-SP3-63 power wire
brush. All grease and oil deposits shall be removed by wiping with a
clean cloth dipped in universal solvent. All surfaces to be painted
shall be clean and free from moisture at the time of painting.
٢٧٣. Paint
Materials which are not specified by brand or make shall be top
quality products, of manufacturer approved by Engineer. Finishing
color code is RAL 7035 / RAL 7032.
٢٧٤. Paint Application
Materials shall be applied in accordance with manufacturer's
written recommendations.
Paint coating shall be uniform and free from defects. Primers and
pretreatment shall be applied as soon as practicable after surface
has been cleaned.
Damage to primer coats shall be repaired before succeeding coats
are applied and the succeeding coats shall be applied as soon as
practicable in accordance with manufacturer's written
recommendations.
Painting equipment shall be kept clean using paint manufacturer
recommended thinner or other compatible thinner.
Conventional spray painting equipment shall be provided with
adequate filters to remove condensate and lubricating oil from the
air stream.
For multicoated application, the individual coats shall be tinted
such as to give distinct and easily visible color difference between
coats to facilitate inspection.
Area adjacent to field welds shall be left unpainted for a
distance of five(5) centimeters and shall be protected for shipment
by application of one coat of rust preventative compound.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٧ / ٩٠
٢٨. INSPECTION
٢٨١. Offsite Inspection
i) General - The Owner will have representative for inspecting all
shop and assembly work associated with the works. The Contractor
shall furnish the Engineer a list of suppliers and the materials
or equipment to be furnished by them for use in the works within
fifteen (15) days of the effective date of Contract. The list
shall be furnished in sufficient time to permit inspection and
testing of materials and equipment. All mill or shop orders
shall quote the pertinent requirements of the technical
specification and shall bear a suitable notation advising the
suppliers of inspection requirements. If so requested by the
Engineer, the Contractor shall furnish triplicate copies of
designated mill and shop orders.
No materials or equipment shall be shipped until all mill and
shop tests, analyses, and inspections are completed, and results
of tests or analyses are accepted.
All inspections and tests will be performed in such a manner as
not to unduly delay the work. The Engineer reserves the right to
charge to the Contractor any additional cost of inspection and
testing when materials and equipment are not ready at the time
such inspection and testing is requested by the Contractor or
when reinspection or retesting is necessitated by rejection.
j) Testing of Materials - Materials incorporated or to be
incorporated in the works shall be tested during the progress of
the work as requested by the Engineer, and samples of such
materials shall be furnished by the Contractor for testing when
requested by the Engineer. All tests performed by the Contractor
shall be witnessed by the Engineer unless the requirement
therefore is waived in writing, or unless certified test results
are required to be submitted to the Engineer. The Contractor
shall give the Engineer reasonable advance notice of all such
tests. The Engineer or his authorized representative may perform
additional tests of materials tested by the Contractor, and the
Contractor shall furnish samples for his purpose as requested.
Whenever a specification or test method of the ANSI, NEMA, IEEE,
IEC, BS, ASTM, AWS, or other authority is made applicable to
materials, the Contractor shall test the materials in accordance
therewith, shall submit to the Engineer certified copies of test
results, and shall not use such materials until test results
have been approved by the Engineer. The requirement for test
results may be waived in writing by the Engineer. Wherever
reference is made in the drawings or specification to one of the
above specifications of test methods, and the number or other
identification of the specification or test method, representing
the year of its adoption or latest revision is omitted, the
reference shall be to the specification or test method in effect
on the date of the invitation to tenderers. The number of
certified copies of test results shall be as specified in
section 3 of the specification.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٨ / ٩٠
٢٨٢. Construction Inspection
The Contractor shall provide and maintain an inspection system
acceptable to the Engineer covering the works under this Contract.
Records of all inspection work by the Contractor shall be kept
complete and available to the Engineer during the performance of
this Contract including the warranty period.
All of the works shall be subject to inspection and approval by
the Engineer for conformity with the drawings and specification. The
Engineer shall have access to, and may inspect the works at all
times and places at the site of the works, and shall have access to
and may inspect materials and equipment to be incorporated in the
works at all times at the place of production or manufacture, in
such parts of the producing or manufacturing plant as are concerned
therewith, and at the shipping point, as well as at storage yards
and the site of the works.
The Engineer will designate for the Contractor the materials and
equipment to be inspected at the place of production or manufacture.
The Contractor shall give the Engineer thirty (30) days advance
written notice of the start of manufacture or production of
materials and equipment so designated, and the Contractor's
Contracts for such materials and equipment shall include a notice to
the supplier or SubContractor of the inspection requirements of this
Article. Failure to designate materials and equipment to be
inspected at the place of production or manufacture shall in no way
limit the Engineer's right to inspect them at that place.
The Contractor shall furnish the Engineer all reasonable
facilities for his safety and convenience in inspecting the works,
at all times and at all places where inspection may take place.
Inspection by the Engineer shall be performed in such manner as not
to unnecessarily delay the work.
The Contractor shall bear any additional inspection costs
resulting from his failure to have any portion of the works ready
for inspection at the time requested by him for its inspection, or
from reinspection of any portion of the works where the defects
requiring rejection were due to the Contractor's fault or
negligence, and any amount of such costs may be deducted from any
money that may become due to him under the Contract.
٢٨٣. Defects
If so ordered in writing by the Engineer, the Contractor shall
remove, tear out, or disassemble, in whole or in part, any completed
portion of the works to permit its inspection. If such portion of
the Works is found to be defective or unauthorized, the Contractor
shall bear the costs of removal, tearing out, or disassembly, and
the provisions of this article shall apply. If such portion of the
works is found to meet specification requirements, if shall be
replaced, reassembled, or otherwise restored by the Contractor to
its original condition and its removal, tearing out, or disassembly
and replacement, reassembly, or restoration will be considered extra
work.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
١٩ / ٩٠
Neither the inspection nor lack of inspection of any portion of
the works nor the presence or absence of the Engineer during
performance of any of the works shall waive any of the requirements
of the drawings and specification or relieve the Contractor of any
of his obligations there under, and defective work, materials and
equipment may be rejected not withstanding their prior inspection or
lack of inspection by the Engineer, and not withstanding their
conformance with the drawings and specification at the time of any
prior inspection.
Any work, material, or equipment not conforming with the
requirements of the drawings and specification will be considered
defective, and except as otherwise provided below, will be rejected
by the Engineer, whether in place or not.
Upon rejection, the Contractor shall correct defective work,
materials, or equipment, or shall remove and replace them with work,
materials or equipment conforming with the requirements of the
drawings and specification, as ordered by the Engineer. Corrected
material and equipment shall be used in the work only upon the
written approval of the Engineer.
Any work done beyond the lines and grades shown on the drawings
or established by the Engineer, or any extra work done without
written authority will be considered unauthorized and will not paid
for. Such work shall be removed, or removed and replaced with
authorized work, or otherwise corrected as ordered by the Engineer.
The Contractor shall remove, tear out, or disassemble any portion
of the works when necessary to give access to defects in the Works
or unauthorized work, and shall replace, reassemble or otherwise
restore it to its original condition following correction,
replacement, or removal of the defective or unauthorized portion of
the works. If so ordered in writing by the Engineer, the Contractor
shall remove, tear out, or disassemble any portion of the work of
other Contractors, when necessary for the above purpose, and shall
replace, reassemble, or otherwise restore it to its original
condition, all at the expense of the Contractor.
If the Contractor fails to comply promptly with any order of the
Engineer given under this article, the Owner may cause the defective
work, materials, or equipment or unauthorized work covered by the
order to be corrected, removed and replaced or removed, as the case
may be, and the costs thereof shall be borne by the Contractor and
any amount thereof may be deducted from any money due or that may
become due to him under the Contract. If shipment to the Contractor
of any item or part is required, the costs of such shipment shall be
borne by the Contractor.
Any decision of the Engineer under this article shall be final
and conclusive.
٢٩. QUALITY CONTROL PROGRAM
٢٩١. General
The Contractor shall provide and maintain quality control
programs as specified below, for the manufacture of equipment, to
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٠ / ٩٠
Ensure compliance with quality standards of the specification.
Within ten (10) days of the signature date of Contract the
Contractor shall furnish to the Engineer four(4) copies of his
complete quality control and procedures manual, and description of
the organization to be used on this Contract.
Throughout the period of the Contract until shipment from points
of manufacture, the Engineer or other authorized representatives of
the Owner will monitor the Contractor's methods, procedures, and
processes in all phases of the work for compliance with the quality
control program, provisions. Before beginning the work, the
Contractor shall designate to the Owner and Engineer in writing one
employee or member of this organization who shall have authority to
act in all matters relative to the quality control provisions of the
Contract. Failure of the Contractor to maintain the quality control
program throughout all phases of the work will be considered a
failure of the work to conform to the specification.
٢٩٢. Program Requirements
The quality control program shall provide for at least the
following controls:
i) Design - All drawings and production information shall clearly
set forth the standards of quality such as materials to be used,
required machining finishes, welding procedures, and coatings to
be applied. An effective system shall ensure rapid dissemination
of specification and drawing changes throughout the
manufacturing organization and provide for immediate removal of
obsolete information from use. All the latest applicable
drawings and changes shall be available at the time and place of
inspection.
A list of all drawings shall be maintained showing the status of
each, including submittal, dates, reviews and revisions.
ii) Purchased Material Control - Effective quality control shall be exercised over all outside purchased materials to ensure that
the materials meet specification requirements. This control
shall consist of either inspection at source of manufacture,
verification of certified data furnished by the supplier or
inspection upon receipt. Records of purchased material
inspection shall be maintained and be available for inspection
by the Engineer or other authorized representatives of the
Owner.
iii) Tools and Gages - Precision tools, gages and measuring
instruments necessary to verify material conformance to
specifications shall be available before beginning production.
Adequate physical control and safeguarding of tools and gages
shall be provided to prevent their misuse and damage when not in
use. A schedule shall be established and maintained for
periodically checking and calibrating all precision tools and
gages against master standards. This procedure shall include the
maintenance of records to verify the checking of precision tools
and gages as scheduled. Master standards used for checking shall
be periodically certified for accuracy against standards
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢١ / ٩٠
traceable to an international bureau of standards and evidence
of certification shall be made available upon request. New and
reconditioned precision tools and gages shall be calibrated
before being released for use.
iv) Manufacturing Control - The Contractor's inspection organization shall be independent of the line production staff, shall report
directly to top management, and shall be vested with controlling
authority. Before beginning producing, the quality control
program shall provide for determination of those points
throughout the manufacturing process where inspection or tests
are required to ensure adequate control of quality, and
accordingly establish and maintain such in-process inspection
operations as are necessary. Inspectors shall be provided with
instructions clearly detailing what characteristics to inspect,
what standards of acceptance to use and what action to take as a
result of inspecting finding.
The inspection status of material shall be identified at all
times by markings on the material, tags or other suitable means.
Evidence of performance of special processes shall also be
indicated in a like manner. Final inspection and testing shall
be sufficient to ensure compliance of the finished product with
the specifications. Adequate records shall be maintained of all
inspections and tests. These records shall substantiate that the
required inspections and tests have been performed as specified
in the written instructions, and indicate the discrepancies and
reasons for such discrepancies. These records shall be available
and maintained as stated above.
When specification require that manufacturing operations or
processes require certification by codes or certification of
operators and equipment according to said codes, the program
shall provide that such certification are obtained before
production is stated. Evidence of such certifications shall be
maintained and be available for inspection by the Engineer or
other authorized representatives of the Owner.
v) Unsatisfactory Materials - Inspection procedures shall include
adequate measures for positive segregation of unsatisfactory
incoming, in-process and finished material from acceptable
material and to ensure its removal from the manufacturing cycle.
Such measures shall consist of positive and readily discernable
identification as unsatisfactory material and physical
separation from acceptable material. there shall be an
established procedure for analysis and review of questionable
material by a higher authority to determine its disposition.
vi) Handling and Packing - The program shall provide for and
maintain throughout the manufacturing cycle such measures as are
necessary to protect incoming, in-process and finishing material
from damage. These measures shall include protective packing or
wrapping maintaining special environment, special handling and
storage instructions and other specific methods of protection as
required.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٢ / ٩٠
٢١٠ EARTHQUAKE PROTECTION
All outdoor equipment supplied as part of this Contract shall be
capable of repeatedly withstanding accelerations due to seismic
disturbances of 0.35g without damage to or impairment of the
operation ability of the equipment or components thereof.
All equipment mounted in cubicles, panels or other enclosures
shall be mounted in such a manner so as to be protected from
repeated accelerations due to seismic disturbances of 0.35 g.
The Contractor shall show that the equipment to be supplied under
this Contract is capable satisfactorily withstanding the earthquake
forces as specified above and shall include full evidence with the
Tender to substantiate this claim.
٢١١. WEEKLY PROGRESS SCHEDULE
The Contractor shall submit a weekly progress report which will
reflect the current status of the work in comparison to the progress
anticipated in the control schedule, indicating percentage
completion for the various activities shown in the control schedule.
٢١٢. CONTRACTOR'S DRAWINGS AND DESIGN DATA TO BE SUBMITTED DURING THE PROGRESS OF THE WORKS
The Contractor shall supply to the Owner, a complete
documentation of all items of equipment. The document shall consist
of all installation and operation drawings; operation and
maintenance manuals that are required for the clients operation,
maintenance, dismantling, reassembling and adjusting of all
delivered parts of the equipment.
The work will not be considered as completed and taking over
certificate not issued until all documentation as specified in this
section has been delivered.
Manuals shall be bound in hard cover.
The Contractor shall submit for approval to Engineer five (5)
copies of all drawings and design data showing general arrangement
of the works and all the detail drawings and calculations pertaining
to each item to be supplied. All drawings shall be submitted in
accordance with the approved drawing schedule as specified in
article 3.4 herein.
Engineer will return, one (1) print of each calculation and
drawing to the Contractor stamped and signed either "approved" or
"not acceptable" or "approved as noted". In the later case the
drawings will be marked up with such corrections as are deemed
necessary, in the opinion of Engineer to make the works conform to
the intnet of the specification.
The Contractor shall correct and re-submit five (5) copies of the
drawings and/or calculations as often as necessary to obtain
approval.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٣ / ٩٠
The sequence of submission shall be such that information is
available for review of each drawing when it is received.
The Contractor's drawings and design data formally submitted
shall bear a certification, signed by an authorized representative
of the Contractor, that the information shown thereon has been
checked by the Contractor and is correct for use in the project.
Drawings of a preliminary nature furnished for information only and
clearly indicated as such need not be certified.
Approval by Engineer of the Contractor's drawings shall not be
help to relieve the Contractor of any part of the Contractor's
responsibility for the correctness of his drawings.
The Contractor will be liable for any materials purchased for
work done, prior to the final approval of the drawings.
The Contractor's drawings will be the property of the Owner who
will have the right to use them for future work.
Changes made during progress of the work shall be clearly
indicated and new copies or prints with the changes shall be
submitted to the Engineer for approval before any action to commence
them are taken.
No fabrication and manufacturing shall be started, for drawings
used on the work until the drawings have been approved, or have been
stamped "approved as noted" with the further provision that all
comments shall be complied within the fabrication and shown on the
next submittal.
After the drawings have been stamped "approved" the Contractor
shall forward for construction purposes five (5) prints of each
drawings which has been so stamped.
After finishing of erection and commissioning and receipt of
"marked up" corrected drawings, the Contractor shall provide for
record purpose five (5) copies of "as built" drawings which contain
all the alterations made therein during construction period and one
set of "as built" reproducibles.
Reproducible must be of sufficient clarify that, under normal
commercial processes, they may be photographically recorded on 35 mm
microfilm from which 450 mm x 600 mm maximum size working
enlargements may be reproduced.
All documents, drawings, dimension sketches, calculation works,
cables schedules and connection diagrams, etc. shall be submitted
for all substation equipments and components to satisfy the
requirements of this section.
Drawing title blocks shall contain but not be restricted to the
following information:
First Line : East Azarbayjan Power Generation
Management Co.
SECOND Line : Contract Number.
THIRD Line : Substation Name.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٤ / ٩٠
FORTH Line : Tabriz Thermal Power Plant.
FIFTH Line : Data, Drawing No., Revision.
Space shall also be made in the title block for incorporating
owener's drawing number of at least 10 digits.
Drawing sizes shall conform to the metric "A-series" and sizes
larger than A2 shall not be used.
All drawings shall be in the metric dimensional system only and
the English language. Where applicable all drawings shall show a
graphic scale, key plan, and north arrow.
Dates on drawings shall be shown with the month abbreviated
rather than represented numerically, e.g.:15 Sept. 92.
Revisions shall be designated 0,1,2,3, etc; commencing with the
first issue.
In correspondence etc., the revision numbers shall be preceded by
the abbreviation "Rev".
Detailed fabrication and erection drawings of equipment to be
supplied by Contractor shall be prepared. Dimensions shown on such
drawings shall conform with measurements of associated structures as
shown on "approved" drawings.
Particular requirements of relay protection and control
documentation shall be considered as follows:
a) Individual sets of drawings shall be produced for each relay as related to the line terminal, transformer and bus protection,
control and metering schemes. Each set shall include at least
the following drawings:
− Index to the set.
− List of all symbols used.
− Single line diagram for the terminal covered by the set.
− AC elementary diagrams.
− DC elementary diagrams.
− Connection diagrams.
b) The following guide lines should be considered for preparation of drawings:
− The maximum width of each drawing should be 30 centimeters.
− More than one sheet may be used for each of the above listed drawings, provided adequate and clear cross referencing is
used to assure continuity of circuits which appear on more
than one sheet.
− Attempting to combine the functions of elementary and
connections diagrams on one drawing is detrimental to both
functions and should be avoided.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٥ / ٩٠
− A given detail shall appear on only one sheet of a set.
− Where necessary for ease of comprehension, the internal
details of relays should be shown on DC elementaries, for the
DC portions and the AC portions shown on AC elementaries.
− Relay coils and their contacts shall be listed and referenced as to location on the drawings, spare contacts, etc.
− IEC device function symbols shall be used throughout.
c) As-built diagram for internal circuits of all relays indicating all electronical element, etc. to be submitted to the Engineer.
d) All relay setting calculation to be submitted.
CONTRACTOR'S DRAWING SCHEDULE
The Contractor shall submit to Engineer a proposed drawing
schedule within ten (10) days of the effective date of contact.
Engineer will approve or approve with noted deficiencies the
proposed schedule and return it to the Contractor.
The drawing schedule shall list all drawings to be submitted for
approval.
The scheduled date of first submittal, time allowed for
Engineer's approval, and expected date of issue after final approval
shall be shown for each drawing.
The Contractor shall submit an updated revision of the schedule
for approval or certify that the previous issue is still in effect
every weeks over the contract period.
٢١٣. PURCHASE ORDERS AND DELIVERY SCHEDULES
The Contractor shall submit to Engineer in triplicate, unpriced
copies of all requisitions and purchase orders, within seven (7)
days of placing such verbal or written orders, showing both delivery
date ex-factory and C & F site.
Within reasonable intervals from effective date of Contract the
Contractor shall submit to Engineer in triplicate a project order
schedule which shall portray the present status of major orders
placed by the Contractor at the date. In case of certain orders,
when requested by Engineer, the delivery status shall be reported at
more frequent intervals.
٢١٤. SHIPPING INSTRUCTIONS
The Contractor shall advance mail copies of packing lists for
each shipment to Engineer.
At least seven days prior to each shipment, a description of
packing and crating proposed shall be submitted to Engineer.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٦ / ٩٠
٢١٥. CONTRACTOR'S ERECTION INSTRUCTION MANUALS
The Contractor shall provide five (5) hardcopies & related
electronic file in English of each erection instruction manual
required for the installation of the equipment covered by this
specification and as otherwise specified herein.
٢١٦. CONTRACTOR 'S SPECIFICATION
The Contractor shall submit to Engineer, for approval, his
specifications covering the supply, shop fabrication, inspection,
testing, packing, transportation, and erection for the work covered
by this specification.
٢١٧. CORRESPONDENCE
The Contractor shall submit correspondence in six (6) hardcopies
& related electronic file, in accordance with the correspondence
procedure to be issued by Engineer.
٢١٨. TEST SCHEDULE
The Contractor shall submit to Engineer for approval a test
schedule for his equipment which shall include such tests specified
throughout the specification and in the relevant standards. The
schedule shall cover type, routine or any other factory tests.
Where tests are re-scheduled from the dates previously given in
the test schedule, the Contractor shall so advise Engineer.
٢١٩. FIELD TESTS
The Contractor shall submit to Engineer for approval details of
all tests to be performed on each piece of equipment during field
testing commissioning.
٢٢٠. TEST REPORTS
Test reports shall be submitted in six (6) hardcopies & related
electronic file to Engineer as soon as possible after tests are made
and prior to incorporating the material in the works. The reports
shall be in such form as to enable determining compliance with the
applicable specifications for the material tested. Test reports
shall be accompanied with a certificate of compliance of the
equipment with the type and routine tests stipulated in the
applicable standards.
٢٢١. OPERATING AND MAINTENANCE MANUALS
The Contractor shall submit to Engineer for review four (4)
complete sets of detailed operating and maintenance manuals covering
operation and maintenance of all equipment supplied.
SPECIFICATION
SECTION 2 - GENERAL REQUIREMENTS
٢٧ / ٩٠
Once Engineer has made the final review, the Contractor shall
provide six (6) bound sets of complete manuals and one (1) complete
set of the corresponding plates for their reproduction by the
rotoprint method for each substation.
The Contractor shall provide Engineer, together with reduced
drawings of the relevant parts detailed in the operating and
maintenance manuals, ten (10) bound specially prepared part lists
and catalogues covering all equipment provided and which may be
necessary and/or useful for operation, maintenance, repairs,
dismantling or assembly and for identifying the parts when
requesting spares.
In addition to above the following general manuals, covering the
whole project, shall be delivered but not be limited to:
١. A general description of the equipment in this Contract.
٢. Operating instructions, suitable for training of personnel.
٣. General maintenance instructions, describing frequencies and
methods for regular inspections, for planned maintenance and for
regular part replacements. The instructions shall also include
fault location guides.
٢٢٢. LANGUAGE
All drawings, catalogues, illustrations, printed specifications,
operating and maintenance manuals and parts lists shall be submitted
in English.
٢٨ / ٩٠
SPECIFICATION
SECTION 3 - MEDIUM VOLTAGE INDOOR
SWITCHGEAR
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٢٩ / ٩٠
٣٫١ DESCRIPTION
Medium voltage indoor switchgear shall mean 6 KV metalclad and
withdrawable switchgear cubicles with vacuum circuit breakers,
instrument transformers, earthing switches and required equipment of
LV compartment for indoor installation. Work of this section
includes design, manufacture and factory testing of medium voltage
indoor switchgear and all their accessories, including cables
accessories and the connection of this system. The switchgear shall
be complete ready for installation.
٣٫٢ TERMINOLOGY
Technical terminology is to be as defined in latest edition of
IEC 60050, I.E.E.E 100 and/or ANSI C42-100 standards.
٣٫٣ STANDARDS
Work of this section shall comply with the requirements of latest
edition of IEC, IEE, BS, DIN, ANSI and NEMA standards within which
IEC standard is preferred.
٣٫٤ DESIGN
٣٫٤٫١ General
The Contractor is totally responsible for mutual compatibility
and adequacy of all medium voltage outdoor switchgear and all other
corresponding equipment in any respect.
The medium voltage outdoor switchgear shall be modular design
with pull out breakers. Control, protection and metering scheme are
specified in relevant section in technical specification and
drawings.
The medium voltage circuit breakers shall be trip-free and anti
pumping. The operating mechanism of the breakers shall be of the
stored energy spring type.
Each medium voltage breaker shall have a manually operated
grounding switch mechanically interlocked with the breaker.
Withdrawal and insertion of the breakers shall not be possible
with breaker main contacts closed. The operation of circuit breakers
inside cubicles shall be inhibited when 6 KV busbars are earthed for
maintenance.
The following auxiliary supplies are available for control:
(Voltages are nominal).48 or 125 volts DC 400/230 volts AC 50 Hz
Close command shall be blocked when insufficient energy is
available for subsequent tripping.
Circuit breaker and its associated earth switch shall be provided
with auxiliary switches having sufficient NO/NC contacts for proper
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٠ / ٩٠
operation of switchgear regarding control, indication, interlocking
and alarms for local and remote control.
Earth switches shall be equipped with interlocking magnet to
block the hazardous operation.
The cubicle shall be so structured and segregated from each other
as to prevent the spread of fire to other compartments of a cubicle
or adjacent cubicles when so occurs.
٣٫٤٫٢ Detailed Data
١) Particulars of systems: 7.2 kV
١$١ Nominal voltage kV (rms) 6
٢$١ Highest voltage kV (rms) 7.2
٣$١ System frequency Hz 50
٤$١ Number of phases 3
٥$١ System neutral earthing Non effectively earthed
٢) Service conditions: -
٣) Particulars of the installation and its components:
١$٣ Indoor or outdoor installation indoor
٢$٣ Number of busbars No. 3
٣$٣ Rated voltage kV (rms) 6
٤$٣ Rated frequency Hz 50
٥$٣ Insulation level (at IEC conditions)
١$٥$٣ Rated 1 min
power
frequency
withstand
voltage kV (rms) 28
٢$٥$٣ Rated lightning
impulse
withstand
voltage kV (peak) 75
٦$٣ Rated normal currents (inside cubicle)
١$٦$٣ Busbars A 2500
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣١ / ٩٠
٢$٦$٣ C.B and other
equipment
(incoming/outgi
ng) A 2500/1250/630
٧$٣ Rated short time
withstand current kA (rms) 40
٨$٣ Rated duration of
short circuit S 1
٩$٣ Rated peak withstand
Current kA 102
١٠$٣ Degrees of protection
for the IP42 enclosure
and partitions -
١١$٣ Type of metal-enclosed
switchgear and
controlgear -
٤) Additional technical data for C.B.: 7.2 kV
١$٤ Type Vacuum
٢$٤ Number of poles 3
٣$٤ Rated short circuit
breaking current kA (rms) 40
٤$٤ Rated duration of short
Circuit S 1
٥$٤ Rated cable-charging
breaking current A (rms) 31.5
٦$٤ First-pole-to-clear factor 1.5
٧$٤ Break time ms 60
٨$٤ Rated operating sequence -
٩$٤ Type of operating devices Spring
١٠$٤ Method of operation Manual and Power
١١$٤ Rated supply voltage and
rated supply frequency 125 V DC(CONTROL & MOTOR)
48 V DC (CONTROL)
400/230 V AC,50Hz(HEATER & LIGHTING)
٥) Additional technical data for V.T.:
١$٥ Type Dry and inductive wound
(indoor)
٢$٥ Rated primary voltage kV(rms) 6/√3
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٢ / ٩٠
٣$٥ Rated secondary voltage V(rms) 100/√3
٤$٥ Number of secondary winding 1
٥$٥ Accuracy class of each winding 0.5+3P for busbar
0.5+3P for incoming
٦$٥ Rated burden of each Winding VA 50
٧$٥ Max. partial discharge
at 1.1/√3 rated voltage PC 25
٦) Additional technical data for C.T
١$٦ Type Dry
٢$٦ Rated primary current According to
PSLD
٣$٦ Rated secondary current A 5
٤$٦ Max. partial discharge
at 1.1/w3 rated voltage PC 50
٣٫٥ FABRICATION AND MANUFACTURES
٣٫٥٫١ Switchgear Cubicles
Unit type construction shall be used to form a rigid self
supporting, self-contained housing. Panel cladding shall be cold
rolled steel, minimum 3 mm reinforced where cutouts occur.
The all metal clad enclosure shall be complete with full length
front doors, bottom cable entry, bolted rear panels for access to
6 KV bus, top covers, terminals and shall be provided in such a way
to minimize the risk of danger to personnel.
All surfaces shall be cleaned free of all rust and foreign
material, painted with a rust resistant paint, primed, sealed
(sealer required on exterior only) and finished with two coats of
indoor paint suitable for the environmental conditions. The interior
shall be white in color , the exterior color shall be light gray.
All surfaces to be painted shall be cleaned and free from
moisture at the time of painting. paint materials which are not
specified by brand or make shall be top quality products, of
manufacturer approved by client's representative. Paint coating
shall be uniform and free from defects. Primers and pre-treatment
shall be applied as soon as practicable after surface has been
cleaned. Damage to primer coats shall be repaired before succeeding
coats are applied as soon as practicable in accordance with
manufacture's written recommendations.
Painting equipment shall be kept clean using. Manufacturer
recommended thinner or other compatible thinner.
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٣ / ٩٠
Conventional spray painting equipment shall be provided with
adequate filters to remove condense and lubricating oil from the air
stream.
For multi coat application, the individual coats shall be tinted
such as to give distinct and easily visible color different between
coats to facilitate inspection.
Panels shall be bolted together, they shall not be welded. All
panels shall be fitted with an interior light which is operated by a
switch , a 230 volt single phase socket and a thermostat controlled
heater to prevent condensation. The panels shall have structural
steel base channels and shall be bolted to the floor.
The cubicles shall include:
١) Draw out breaker equipped anti pumping & trip free features.
٢) Copper busbars shutter system to isolate the copper busbars
automatically when rocking out breaker or moving truck.
٣) Operating slot for grounding switch operation.
٤) Grounding switch mechanically interlocked with its associated
breaker to prevent grounding into live circuit.
٥) Mechanically operated breaker operation counter inside each
breaker cubicle.
٦) Heater and thermostat inside each cubicle.
٧) Lighting equipment inside each cubicle wherever necessary.
٨) Potential transformers connected star-star with suitable
protection for primary and secondary, as required.
٩) Current transformers with suitable burden for protection and
measuring instruments.
١٠) Adequate pothers for 6 KV cables.
١١) Grounding switch.
Each circuit breaker cubicle shall have the following items front
mounted on the cubicle:
١) Circuit breaker control switch with red, green and amber lights.
٢) Earth switch position indicator.
٣) Circuit breaker position indicator.
٤) Local/Remote selector switch.
٥) Test blocks for current transformer connections with automatic
shorting bars.
٦) Push button for lamp tests.
٧) Manual spring charging and manual close-open facility.
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٤ / ٩٠
٣٫٥٫٢ Instrument Transformer
Instrument transformers shall be dry type suitable for indoor
use.
Current transformers shall be of the same insulation class as the
switchgear and shall be rated to withstand the mechanical
(momentary) and thermal (short time) effects of the short circuit
currents of the system. The output of each current transformer shall
be suitable for correct working of all rated devices i.e.:
protective devices, measuring instruments etc. Over the required
range of load and fault duties. Where dual-purpose current
transformers are used for both measurement and protection, the
requirements shall be met for all secondary winding being connected
to their maximum burdens simultaneously.
Main ratio is required values, rated secondary current shall be
5 A. Current transformer circuits shall be terminated on test links.
Potential transformers shall be of the same insulation class as
the switchgear. All potential transformers shall be inductive wound
types.
The secondary voltage of the potential transformers shall be
100/√3 volts and the primary nominal voltage the same as the
switchgear. Burden of all potential transformers shall be equal .
Adequately rated fuses shall be provided in the secondary and
primary circuits. The potential transformers shall be capable of
maintaining of rated accuracy class as per IEC 60185. Provision
shall be made to prevent an arc on primary disconnecting contacts by
arranging the secondary contacts to break before primary contacts
part on withdrawal of the potential transformers. Provision shall be
made to prevent personnel for coming in contact with the potential
transformer primary fuses until after the primary disconnecting
devices have separated by a safe distance and are properly grounded.
The medium voltage system is not effectively grounded.
٣٫٥٫٣ Busbars
Main bus shall be copper, insulated with self extinguishing
insulation and be complete with insulated supports. Busbars shall be
sized to adequately carry the currents rating of 2500 A. Busbars
shall be color coded in red, blue & yellow.
٣٫٥٫٤ Ground Bus
A minimum of 120 mm cross section of copper ground bus shall
extend along the length of each panel. Clamp type connectors shall
be provided for directly connecting together the ground bus of
adjacent panels.
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٥ / ٩٠
The bus shall be so arranged that it does not interfere with the
removal of any panel from a panel assembly or with the access to or
operation of equipment within a panel.
٣٫٥٫٥ Terminals
Stud type terminal blocks of unit construction shall be provided
to accommodated all circuits entering or leaving the panels. A
minimum of 10% spare terminals shall be included for spare or future
circuits. Terminals shall have insulating barriers between points.
The terminals shall be grouped and labeled according to their duty
by strips securely attached to each block.
Terminal block shall be 600V grade, 10 A rated.
Terminal size for voltage signals not less than 4 with
severability and for current signals not less than 6 with both
severability and shortening facilities.
Ferrules identified with appropriate wire numbers shall be
provided at both ends of each wire within panels.
Removable covers of clear transparent insulating material shall
be provided over terminal blocks on which connections are provided
for a circuit of greater than 125 volts. Terminal blocks shall not
be used as junction points for cables which are not required in the
panel.
٣٫٥٫٦ Panel Wiring and Connection
Control wiring shall be thermoplastic insulated stranded copper
of a size not less than the following:
a. Panel wiring, excluding current transformer circuit single
conductor 2.5 mm2
b. Current transformer circuit 4 mm2
Extra flexible wire shall be used for connections to equipment on
hinged frames. Wiring in panels shall be covered with self-
extinguishing cotton braid. All wiring shall be carried out without
intermediate splicing. All cables shall enter the panels from the
bottom. Flame-proof plastic wiring ducts shall be provided at the
sides and bottom of the panels to carry wiring vertically to the
terminal blocks. the ducts shall be perforated and shall be provided
with a detachable cover.
Wire ends shall be fitted with crimped ring type terminals. Not
more than two wires shall be terminated on any one stud or terminal.
Each terminal point on the terminal block shall be indelibly labeled
in accordance with wiring designations.
The DC trip and AC voltage supplies and wiring to the main
protection shall be segregated from those for back-up protection and
also from protective apparatus of special purpose.
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٦ / ٩٠
The incoming power supply to each panel shall be through fuses in
such a manner that the supply to any one panel can be isolated from
the remaining panels. Fuse holders shall be the dead front types.
The color of the cubicle wiring shall preferably be different for
AC and DC circuit.
All secondary and control wiring within a high-tension
compartment shall be protected by a grounded armor shield.
٣٫٥٫٧ Nameplates
Beveled sheet mica nameplates shall be provided. They shall be
the same color as the panel with black engraving.
A panel nameplate approximately 25 mm x 125 mm shall be placed on
the front and rear of each panel.
Nameplates approximately 15 mm x 60 mm with lettering 4 mm high,
shall be placed on the front of each panel for indicating lamps,
push buttons and control switches. Ampere ratings for fuses or
circuit breakers and also nameplates with descriptive functions for
switches or similar items shall be provided.
Each nameplate must bolted or riveted on to a non-removal part of
the cubicle. Stick-on or glued labels are not acceptable.
Nameplates are to be mounted 0.5 cm below indicating lights,
control switches and push buttons.
Each cubicle shall have a rating plate with the information
required by the IEC 298 and in addition ambient temperature basis
for ratings.
Each device installed in the cubicle, each terminal strip and
each indicating and operating element shall be identified with
permanently attached plastic labels of approved design. Inscriptions
on these labels must coincide with those used on the drawings.
Each circuit breaker, earthing switch, instrument transformers
etc.Must have its own rating plate with information according to
relevant IEC standard.
٣٫٥٫٨ Switches
All switches shall be of the rotary type, with silver-plated,
self-cleaning contacts and rectangular deals on which function
positions are clearly indicated.
Switches shall be suitable for interrupting the trip and close
currents of the circuit breaker control circuits without requiring
the use of interposing relays.
٣٫٥٫٩ Pilot Lamp Assemblies
Pilot lamps of the standards switchboard type shall be provided
for, but not necessarily limits to the following indications:
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٧ / ٩٠
١) Breaker "open" - "closed" ("green - red")
٢) Shutter Closed (amber)
٣٫٦ INSPECTION AND TESTS
Perform all inspection, routine tests and type tests stipulated
in applicable standards to ensure that material and workmanship
conform to the specification and drawings.
Give Engineer access to the works for determination or assessment
of compliance with the provision of this specification or to witness
the Contractor's inspection or tests.
Produce a certificate of compliance of the equipment with the
design, routine and type tests stipulated in the applicable
standards.
Owners reserve the right to have representative present during
final shop and functional testing. The Contractor shall advise the
date of test at least ten days in advance.
The following tests shall be performed on metalclad switchgear in
accordance with 62271-200.
٣٫٦٫١ Type Test
- Tests to verify the insulation level of the equipment
- Tests to prove the temperature rise of any part of the
equipment and measurement of the resistance of
circuits
- Tests to prove the capability of the main and earthing circuits
to be subjected to the rated peak and rated
short-time withstand currents
- Tests to prove making and breaking capacity of the included
switching devices
- Tests to verity the protection of persons against access to
hazardous parts and the protection of
equipment against solid foreign objects
- Test to access the effects of arcing due to an internal fault
(for switchgear classification IAC)
- Electromagnetic compatibility tests (EMC)
Despite of mentioned tests, the following tests shall be
performed on interior component of metalclad
switchgear in accordance with IEC 62271-100, 60044-1 and 60044-2.
- Mechanical and environmental tests on circuit breaker including
mechanical operation tests in
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٨ / ٩٠
ambient temperature and higher and lower temperature tests.
- Resistance temperature of circuit breaker contacts
- Capacitive current switching tests including single capacitor
bank and back-to–back capacitor bank
- Accuracy tests for instrument transformers
- Other equipment shall test in accordance with relevant IEC
٣٫٦٫٢ Routine Tests
According to IEC 62271-200 following tests shall be carried out
on metalclad switchgear components:
- Mechanical operation tests
- Tests of auxiliary electrical , pneumatic and hydraulic devices
- Tests after erection on site
In spite of aforesaid tests, following tests shall be performed
on metalclad switchgear
- Resistance measurement of circuit breaker contacts and
lightning impulse test in accordance
with IEC 62271-100
- Accuracy test on instrument transformers
- Routine tests on other equipments in accordance with relevant
standards
٣٫٧ Commissioning
After a metalclad switchgear has been installed and all
connections have been completed,
commissioning tests are recommended to be performed to confirm
that transportation and storage
have not damaged the metalclad switchgear.
The manufacturer shall produce a program of site commissioning
checks and tests. Repetition of the
full program of routine tests, already perfumed in the factory,
shall be avoided. For this purpose the
commissioning tests shall include, but not limited to the
following items. The results of the tests shall
be recorded in a test report.
- Visual inspection and assurance of erection, correct
installation, lack of damaging and electrical
commotions correctness.
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٣٩ / ٩٠
- Assurance of direct connection existence of metal body to
ground network.
- Visual inspection of inner components of switchgear, assurance
of damaging lack and control of
electrical connections.
- Insulation resistance test with megger.
- Control of high voltage phase consequences.
- Operation test and circuit breaker adjustment.
- Operation test of mechanical and electrical interlocks.
- Operation test of explosion valve and relevant interlocks.
- Current transformer test.
- Voltage transformer test.
- Not being short circuit of CT secondary is in connection and
being short circuit of CT secondary
is not in connection.
- Test and adjustment of measurement apparatus.
- Operation test of alarming and indicating devices.
- Test of cells ventilation.
٣٫٨ Drawings & Documents
٣٫٨٫١ Documents to be given by tenderer
- Filled schedule MECL (II)
- Catalogue & technical pamphlets
- Summary of type test reports
- Outline drawing
- Detailed summary of exceptions to tender specifications
- List of spare parts
- Reference list of switchgear and main components
- List of special tools
٣٫٨٫٢ Documents to be given by contractor /supplier
The electrical and mechanical design, fabrication, factory
testing, working and packing,transportation, erection, site test,
operation and maintenance drawings, documents and manuals shall be
submitted not limited to the following:
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٠ / ٩٠
- Design calculation sheets to establish adequacy of metalclad
switchgear in any respect;
- Outline dimension and cut away drawings
- Packing details
- Shipping, warehousing, assembling, erection, commissioning,
operating and maintenance
instruction manuals.
- Name plate drawings
- Control and wiring diagrams
- Operation mechanism drawings
- Site test instruction manuals
- Routine test documents
- List of components
- Type test documents
- Work schedules and monthly progress report
- Drawing list
- Final as built Doc./Dwg.
- Dismantling, reassembling & adjusting manuals
٣٫٩ SPARE PARTS
Mandatory spare parts shall be provided as per relevant schedule
of prices for this section.
The tender shall recommend any additional spare parts considered
necessary.
Spare part List:
Equipment Rating Quantity
CB 2500 A 1 Set
CB 1250 A 1 Set
CB 630 A 1 Set
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤١ / ٩٠
Protection:
Cables:
1x(3x150 mm2) Cop.: Means connection 3 φ with 1 copper 3 core cable section 150 mm2 each core.
Abbreviation:
Cop.: Copper
Cl.: Class
Fs.: Security Factor
RMS: Root Mean Square
Function Code Function Description Function Code Function Description
25 6 KV Change Over system 51 Delayed Overcurrent
27 Under Voltage 59 Over Voltage
26 Temperature 64 Earth Fault
46 Reverse Phase 71 Transformer Oil Level
49 Thermal Over Load 87 Differential
50 Instantaneous Overcurrent 97 Buchholz (Tr. Gas Detector)
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٢ / ٩٠
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٣ / ٩٠
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٤ / ٩٠
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٥ / ٩٠
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٦ / ٩٠
SPECIFICATION
SECTION 3 – MEDIUM VOLTAGE INDOOR SWITCHGEAR
٤٧ / ٩٠
٤٨ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٤٩ / ٩٠
٤. CONTROL & PROTECTION
٤١. DESCRIPTION
Relays placed in LV compartment of panels with switches,
interpose C.T.s and V.T.s , fuses, etc. .Work of this section
includes: design, supply, manufacture, testing, transportation,
installation and commissioning of relay and all other protection
devices, which are to be supplied loose, with all their accessories.
The extent of work shall also include the preparation and
furnishing of schematic wiring, internal wiring and external cable
connection drawings.
The contractor shall be responsible for obtaining information
regarding parts of the installation not covered by the order, which
can affect the design of the control equipment.
٤٢. TERMINOLOGY
Technical terminology is to be as defined in latest edition of
IEC 50, I.E.E.E. 100 and/or ANSI C4200 standards.
٤٣. STANDARDS
Work of this Section shall comply with the requirements of latest
edition of IEC, BS, DIN, ANSI and NEMA standards within which IEC
standard is preferred.
See also section 2.4.
٤٤. DESIGN
٤٤١. General
The Contractor is totally responsible for mutual compatibility
and adequacy of all control and relay and all other corresponding
equipment, in any respect.
The electrical control and protection scheme for the switchgear
shall be as shown on the drawings.
The design of the relay protection shall be such that high
tripping reliability will be achieved. This applies to a
particularly high degree in cases where the remote back-up function
provides unselective tripping of the primary fault.
The relay protection shall be designed in such a manner and shall
have such functional values that operational reliability of the
plant will not be significantly affected. In this connection special
considerations shall be given to the risk of spurious tripping as a
result of e.g.: inrush currents, etc. It is not acceptable for
switching in to require several attempts, or to cause tripping of
parts of the network which is in operation.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٠ / ٩٠
Strict demands are made on selectivity in isolation. Only the
minimum possible part of the plant shall be tripped to isolate the
fault or clear the abnormal conditions. In addition, the fault must
be tripped with in the time necessary for equipment protection,
personnel protection, reasonable restriction of material damage,
etc, and before damage has had time to occur in the event of
abnormal operating conditions. Tripping of a faulty part of the
plant shall take place before mechanically and electrically adjacent
parts of the plant are damaged.
Mal operation of the relay protection as a result of the
characteristics of measuring transformers shall be taken into
account in conjunction with the design of relay protection and
dimensioning of the auxiliary wiring. Unless otherwise specified all
functional requirements on the relay protection function shall be
satisfied for short circuit powers and associated zero-sequence
impedances at the maximum, minimum and intermediate values.
The measurement and tripping zones shall be coordinated with
breaker failure protection function, so that primary faults between
the breaker and the current transformer will be tripped by the
breaker failure protection function, with the possible degree of
selectivity.
The function of control is to collect all information necessary
for the operation personnel to supervise the operating conditions of
the plant and whenever necessary to initiate changes to the
operating conditions.
The LV compartment shall be so dimensioned that it can be adapted
to the maximum extension possibilities for the switchyard.
In addition, it shall be so designed that no drilling on site is
necessary when carrying out such extensions.
٤٤٢. Synchronizing
Synchronizing & Change Over facilities shall be provided for
manual and automatic closing of the breakers.
It is required for the synchronizing equipment that voltage
information be supervised so that the equipment will be blocked if
fuse should fail for the measuring transformers.
Selectors and terminals shall be provided for testing. The
selector shall also serve as an isolating switch.
Voltage-check relay shall be provided in order to permit the C.B.
to be closed on live line/dead bus and dead line/live bus
conditions. The relay shall recognize live condition for voltages
80% of relay rating (Un) and dead conditions for voltages adjustable
between 30%-80% of relay rating.
Change Over "On/Off" & "Auto/Manual" switches located on LV
compartment shall be used for connecting the voltages to be change
overed to the change over unit. The individual switch shall be
connected so that only one circuit breaker at a time can be
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥١ / ٩٠
energized. The unit shall be designed in such a manner that it will
not be possible to interconnect inadvertently the voltage circuits.
The automatic closing (change over) of the breaker shall be
called from the panel and by remote control.
Auto/Manual selector switch shall be provided on potential cell
panel to facilitate the appropriate mode of operation to be
selected. As a general rule, when the selector switch is on AUTO
position, all breaker closures from the panel, remote control
equipment, shall take place automatically via the change over
equipment. Scope shall be provided for shunting the change over
equipment via selector switch when it is on MANUAL position, so that
direct operation of the breaker due to defective change over
equipment can be carried out. On MANUAL closure the synchroscope
unit shall be employed as an aid. This shall consist of a double
voltmeter, synchronscope and double frequency meter, placed on the
change over control panel. Potential cell panel shall be so
positioned to give easy view to operator.
When the change over equipment is switched "On", this shall be
indicated on the change over control panels and remotely for the
relevant breaker.
For all measured voltages insulating transformers shall be
included in the change over equipment.
The auxiliary power shall be taken from a special fused 125 VDC.
If the equipment requires an ac supply, this shall be taken from the
station service 230 VAC.
٤٤٣. Inter-Tripping (Transfer Tripping Scheme)
This function is required to trip all outgoing feeders whenever
relevant incoming feeder trip.
٤٤٤. Panel DC Circuit Supervision
The DC supply to the protections in each relay panel supplied
shall be supervised via an under voltage relay and lamp. An alarm
shall be initiated on the loss of the DC supply.
The relay shall be so positioned to detect the failure of
interconnection circuit of DC supply to all the relays and
protection devices within the panel.
٤٤٥. Common Breaker Control and Protection Schemes
All the control/protection schemes finally operate the circuit
breaker. The following relays/systems shall generally be followed
for each circuit breaker.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٢ / ٩٠
٤٤٥١. Auxiliary Supply
The auxiliary and control supply of the breaker for the following
circuits shall be protected by separate set of fuses or other
appropriate protective devices:
(a) Closing coil.
(b) Trip coil
(c) Motor operating mechanism.
(d) Lighting and heating.
The DC control supply protective devices shall be installed in
respective panels, whereas for AC supply they shall be installed in
respective circuit breaker operating mechanism.
٤٤٥٢. Trip Circuit Supervision Relays
Trip circuit supervision relays for supervising each trip coils
of every breaker after closing of the breaker shall be provided. The
relay on operation shall give annunciation. It shall also be
provided with a hand reset flag indicator. The trip coil supervision
relays coil ratings designed for DC control voltage and relays shall
operate satisfactorily between 80% and 120% of the rated voltage.
The time between failure of the trip circuit and operation of the
alarm contacts shall be such as to prevent mal operation due to
transient voltage condition. The pick up and drop off current of the
relays shall not be so small such that relay will self drop due to
deposit of some dust particles etc. in the breaker auxiliary
contacts and thereby giving false indications for breaker trip coil
faulty.
The trip circuit supervision scheme shall involve passing a low
level current through the trip circuit (including the breaker trip
coils) and shall be so wired to supervise all wiring of the trip
circuit.
٤٤٦. Tripping Circuits
Contacts or terminals for tripping must not be used for auxiliary
functions - exclusive contacts or terminals for the tripping
function.
High functional security and speed are necessary in the tripping
circuits, and the system design shall thus be such that a minimum of
series-coupled circuit elements will be required.
The tripping circuits shall be of single-pole design. Only the
positive poles shall be closed at tripping. The negative pole is
permanently connected to the tripping coil of the breaker.
Tripping coils in the breaker shall be supplied via tripping
relays which must have an operating time not in excess of 5 ms.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٣ / ٩٠
Tripping contacts shall also be capable of breaking the circuit
to the solenoid even if the auxiliary contact in the breaker should
fail to open.
Relays in tripping circuits electrically located after the
testing devices of the relay protections shall be equipped with
testing devices. The entire trip function from the relay protection
to the outgoing cable to the switchgear shall be capable of being
tested without the breaker being operated and with no other action
for isolating the circuit than operation of permanently installed
test devices.
In every relay for relay protection provision shall be made for
isolating the outgoing tripping signal by means of easily operated
isolating devices on the front of the cubicle without the relay
protection measurement being blocked.
Individual electrically reset type lock out relay should be
provided for each breaker to lock its closing circuit. In the event
of permanent faults.
٤٤٧. Testing Facilities
All relay protection shall be capable of being tested
individually (even during normal operation) with adequate safety of
the test personnel and without the risk of spurious tripping.
Various partial protection functions for a given primary object
shall include facilities for individual testing with the other
protection in operation. When testing the protection, it is not
acceptable that the protective functions in the other system are
blocked or activated.
The design shall be such that external test equipment can be
connected to the protection at a permanently mounted connector. All
quantities necessary for measuring the functional values of the
protection as well as the tripping function shall be connected to
this. In addition, the design shall be such that (after testing) the
protection will safely revert to operational condition.
All actions, necessary in normal maintenance testing shall be
capable of being carried out from the front of the relay related
cubicle, where the switching devices for testing shall also be
located.
For replacement of faulty relays "plug-in" or "draw-out" systems
are preferred.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٤ / ٩٠
٤٤٨ Motor Feeder Scheme without Differential
Protection
The motor feeder scheme without differential protection schematic
diagram is shown in relevant drawing number SEP1_30 and consist of
main following relays:
(١) "Device (50)" Over Current Relay
(٢) "Device (46)" Reverse Phase Relay
(٣) "Device (49)" Thermal Overload Relay
(٤) "Device (64)" Earth Fault Relay
٤٤٩ Motor Feeder Scheme with Differential
Protection
The motor feeder scheme with differential protection schematic
diagram is shown in relevant drawing number SEP1_31 and consists of
main following relays:
(١) "Device (87)" Differential Protection
(٢) "Device (50)" Over Current Relay
(٣) "Device (46)" Reverse Phase Relay
(٤) "Device (49)" Thermal Overload Relay
(٥) "Device (64)" Earth Fault Relay
٤٤١٠ Transformer Feeder Scheme
The transformer feeder scheme schematic diagram is shown in
relevant drawing number SEP1_32 and consists of main following
relays:
(١) "Device (50)" Over Current Relay
(٢) "Device (51)" Thermal Overload Relay
(٣) "Device (64)" Earth Fault Relay
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٥ / ٩٠
Follower Relays
For buchholz (97), oil temperature (26) and oil level (71)
protection follower relays should be provided.
Secondary Protection
Properly selected protection on 400 V side of the transformer shall
be provided. The rating and interrupting curve and other
characteristic shall be such to isolate secondary fault maintaining
the required selectivity.
٤٤١١ Medium Voltage Board Potential Case Scheme
The medium voltage board potential case scheme schematic diagram is
shown in relevant drawing number SEP1_33 and consist of main
following relays:
(١) "Device (27)" Under Voltage Relay
٤٤١٢ Coupling Feeder Scheme
The coupling feeder scheme schematic diagram is shown in relevant
drawing number SEP1_34 and consist of main following relays:
(١) "Device (51)" Thermal Overload Relay
٤٤١٣ Incoming Feeder From Startup Transformer Scheme
The incoming feeder from startup transformer scheme schematic
diagram is shown in relevant drawing number SEP1_35 and consist of
main following relays:
(١) "Device (50)" Over Current Relay
(٢) "Device (51)" Thermal Overload Relay
(٣) "Device (64)" Earth Fault Relay
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٦ / ٩٠
٤٤١٤ Incoming Feeder From Unit Transformer Scheme
The incoming feeder from unit transformer scheme schematic
diagram is shown in relevant drawing number SEP1_36 and consists of
main following relays:
(١) "Device (50)" Over Current Relay
(٢) "Device (51)" Thermal Overload Relay
(٣) "Device (64)" Earth Fault Relay
٤٤١٥ Bus Transfer Cubicle Scheme
The bus transfer cubicle scheme schematic diagram is shown in
relevant drawing number SEP1_37 and consists of main following
relays:
(١) "Device (25)" 6 KV Change Over System
٤٤١٦ Measuring Instruments
Apparatuses and components shall be designed and fitted taking
into consideration the relevant operating conditions, possibilities
for comfortable reading, inspection, testing, cleaning and
maintenance. Equipment, especially those having a limited lifetime
shall be easily accessible for replacement and service.
All instruments for front mounting on the panel shall be semi-
flush mounted, back connected, dust-proof, with rectangular cases,
removable covers, and transparent windows and with provision for
sealing where necessary.
Meter elements, specially those requiring testing and adjustment
shall be provided in draw out type cases fitted with devices to
automatically short the current and open the voltage circuits and
where applicable, to provide for interruption of the tripping
circuit. Metering instruments shall be of square type having
dimensions 96x96mm.
All the measuring equipments must be digital type with the following
capabilities:
١- Minimum accuracy class 0.5.
٢- Capability to bear in at least 3In for continuous operation and 25In for 3Sec., 50In for 1Sec.
٣- Capability to bear in at least 1.5Vn for continuous operation and 2Vn for 10Sec.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٧ / ٩٠
All switches shall be of the rotary type with silver plated self-
cleaning contacts and rectangular dials on which function positions
are clearly indicated.
For replacement of faulty relays “plug in” or draw out systems
are required. All auxiliary relay, trip relay and timers may be
supplied in non-draw out type.
All relays, metering, measuring device, which shall be mounted on
front of panels, shall be suitable for flush or semi-flush mounting.
٤٤١٧ Annunciators
Annunciator equipment shall be mounted on the panel adjacent to
the mimic diagrams, capable of accepting all the alarms required
within the substation, and compatible for operation in conjunction
with the relay equipment provided. The annunciator windows shall be
engraved. The size of engraving to be advised later to the
successful contractor.
Number of alarm points shall be sufficient to identify and locate
where the trouble exists. The alarm annunciator equipment shall be
designed in such a way that the necessary corrections or repairs can
be performed in the shortest possible time. At least 20% of the
windows shall be provided as spares.
The annunciators shall be furnished with audible and visual
alarms with acknowledge push-button. The annunciator shall be
suitable for accepting DC power supply as specified in section of
technical specification. The type with repeating contacts for each
alarm point is required for future supervisory alarm indication. The
voltage rating and other specification of repeat contacts shall meet
SCADA and/or interface requirements.
The annunciators shall be mounted on control panels for power
transformer, C.B. and lines as shown in the tender drawings
enclosed.
The alarm points for each substation shall be divided in critical
and non critical alarms. Critical alarms are the ones which require
immediate action and the non critical alarms are of a nature which
require action within some reasonable length of time with respect to
keeping the substations fully operable.
Two different types of audible alarms shall be provided for
distinction between critical and non-critical alarms.
In case of loss of DC supply of annunciator, it shall be possible
to give an alarm to operator by AC supply.
In case of static annunciator schemes, special precautions shall
be taken by the Contractor to ensure that spurious alarm conditions
do not appear due to influence of external magnetic fields on the
annunciator wiring and switching disturbances from the neighboring
circuits within the panels.
Separate annunciation system for each voltage level(i.e.: 230
KV,66 KV,...)shall be provided.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٨ / ٩٠
٤٤١٨ Fuses Links and Ancillary Apparatus
Each protection and control circuits shall be provided with
necessary arrangement for receiving, distributing, isolating and
fusing of DC and AC supplies for various circuits such as
protection, control, signaling, lighting etc. The incoming and sub
circuit shall be such as to ensure selective clearance of sub
circuit faults. Potential circuits for relaying and metering shall
be controlled by fuses.
Carriers and bases for fuses and links shall comply with IEC
recommendations and color coded to permit identification of the
circuit rating.
All fuses shall be of cartridge type mounted on plug in type fuse
bases and adequately shrouded. Fuses shall have operation indicators
for indicating blown fuse conditions. Fuse carrier base shall have
imprints of fuse rating and voltage.
All incoming circuits in which the voltage exceeds 125 Volts
shall be fed through insulated fuses and/or links, the supplies
being connected to the bottom terminal, which shall be shrouded so
that accidental contact with live metal can not be made when the
moving portion is withdrawn.
PT secondary circuits should be equipped with fuse or MCB.
If MCBs are used in VT secondary circuits, they shall have two
normally open and two normally closed auxiliary contacts for
blocking trip circuits of voltage dependent protection and for
annunciation. Where high-speed protection is involved, the speed of
operation shall be less than 5 milliseconds.
٤٥. SUBMITTALS
٤٥١ Calculation Sheets
Submit six (6) copies of all calculations to establish adequacy
of the control and protection devices selected, in any respect, for
the specified duties under all power system operation conditions
(from normal to the most severe fault conditions envisaged) in
accordance with submittals section 3.
٤٥٢ Contractor's Drawing and Design Data
Submit electrical, design, fabrication and erection drawings and
this section in accordance with the sub article 3.3 in submittals
section 3.
The following shall be considered a minimum:
− Outline dimension drawings and installation instruction of the
equipment to be mounted in or on the panels.
− Detail drawings of the printed circuit boards.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٥٩ / ٩٠
− Commissioning test instruction of protection relays.
− Internal wiring and connection diagrams of all apparatus.
− Manufacturer's descriptive and maintenance Literature.
− Commercial data of elements which have been used for
construction of any relay.
٤٥٣ Test Reports
Submit six (6) copies of all final type and routine test reports
together with the certification of the compliance of the equipment
with the type and routine tests stipulated in the applicable
standards.
٤٥٤ Maintenance Data and Operating Instructions
Submit maintenance manuals for this section in accordance with
article entitled "operating and maintenance manuals" in submittals
section 3.
٤٥٥ Relay Settings
East Azarbijan Power Generation Management Company will provide
sufficient system data to the Contractor to enable him to perform
the following works included in this Contract.
(١) Ranging of relays and calculation of relay settings.
(٢) Setting of relays and commissioning of the control and
protection system supplied.
The Contractor shall submit to E.A.P.G.M.Co. 3 complete sets of
calculation and proposed relay setting data for information and
approval, before the installation of the control and protection
equipment.
٤٦. FABRICATION AND MANUFACTURE
٤٦١ Construction of Boards and Panels
The panels shall be constructed of cold rolled steel 3.0 mm in
thickness, welded and reinforced where necessary.
The switch-board panels used for control and metering shall be
designed to facilitate switching and supervision by the operators to
minimize the probability of accidental tripping of circuit breakers
and motor operated switches as a result of human error. The control
switchboards shall be designed and installed in accordance with
future requirements in order to enable installation of future
additions with a minimum of changes to existing installations.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٠ / ٩٠
Relay shall be provided with relays in accordance with those
shown on the drawings of the switchgear single line diagrams. The
relays used for circuit protection shall conform with the details
listed in this section of the specification.
All surfaces shall be cleaned free of all rust and foreign
material, painted with a rust resistant paint, primed, sealed
(sealer required on exterior only) and painted ANSI # 61 or the same
color as existing panel. Panels shall be bolted together, they shall
not be welded. All panels shall be fitted with an interior light
which is operated by a door switch, a 230 volt single phase socket
outlet. The panels shall be bolted to the floor. Each panel shall be
supplied with a heater and thermostat to prevent the formation of
condensation.
٤٦٢ Panel Terminals
Stud type terminal blocks of unit construction shall be provided
to accommodate all circuits entering or leaving the panels.
Test links shall be provided on the current leads of each
protective relay. The test links shall be designed such that the
current leads are short circuited when the test links are open. A
minimum of 10% spare terminals shall be included for spare or future
circuits. The terminal blocks shall be arranged vertically, mounted
at the sides of the cubicle and set towards the rear so that the
ferrule numbers may be easily read. Terminals shall have insulating
barriers between points. The terminals shall be grouped and labeled
according to their duty by strips securely attached to each terminal
block.
Terminal size for voltage signals not less than 4 with
severability and for current signals not less than 6 with both
severability and shortening facilities.
Terminal block shall be 600V grade, 10 A rated.
230 V circuit terminals shall be segregated from other terminals
and fitted with self extinguishing transparent plastic covers to
prevent contact with live parts. They shall have warning labels
mounted there on in a conspicuous position.
There shall be a minimum clearance of 250 mm between the first
row of terminal blocks and the associated cable gland plate. Also
the clearance between two rows of the terminal blocks shall be a
minimum of 150 mm.
Ferrules identified with appropriate wire numbers shall be
provided at both ends of each wire within panels.
Removable covers of clear transparent insulating material shall
be provided over terminal blocks on which connections are provided
for a circuit of greater than 125 volts potential. Terminal blocks
shall not be used as junction points for cables which are not
required in the panel.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦١ / ٩٠
٤٦٣ Wiring and Connections
Control wiring shall be thermoplastic insulated stranded copper
of a size not less than the following:
(١) Panel wiring single conductor. 2.5 mm2
(٢) Wiring external to panels 2.5 mm2
excluding current transformer
circuits.
(٣) Current transformer secondary wiring. 4 mm2
Extra flexible wire shall be used for connections to equipment on
hinged frames. Wiring in panels shall be covered with a self
extinguishing cotton braid. All wiring shall be carried out without
intermediate splicing. All cables shall enter the panels from the
bottom. Self extinguishing plastic wiring ducts shall be provided at
the sides and bottom of the panels to carry wiring vertically to the
terminal blocks. The ducts shall be perforated and shall be provided
with a detachable cover.
Wire ends shall be fitted with crimped ring type terminals. Not
more than two wires shall be terminated on any one stud or terminal.
Each terminal point on the terminal block shall be indelibly labeled
in accordance with wiring designations.
The DC trip, AC voltage supplies and wiring to the main
protection shall be segregated from protective apparatus of special
purpose.
The incoming power supply to each panel shall be through fuses in
such a manner that the supply to any one panel can be isolated from
the remaining panels. Fuse holders shall be the dead front type.
The control circuits for power circuit breakers, motor operated
switches, power transformer, metering, etc., shall be designed for
future supervisory remote control and position indication, contacts
on switches and relays as needed for future supervisory alarms shall
be provided according to section 17.
٤٦٤ Ground Bus
A 40 mm x 3 mm copper ground bus shall extend along the length of
each panel. Clamp type connectors shall be provided for directly
connecting together the ground bus of adjacent panels. The bus shall
be so arranged that it does not interfere with the removal of any
panel from a panel assembly or with the access to or operation of
equipment within a panel.
٤٦٥ Nameplate and Mimic Bus
Beveled sheet mica nameplates shall be provided.
Ampere ratings for fuses or circuit breakers and also nameplates
with descriptive functions for switches or similar items where these
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٢ / ٩٠
may not be assigned a specific standard device function number shall
be provided.
Nameplates are to be mounted 1.0 Cm above relay cases, 0.5 Cm
above indicating lights, control switches and push buttons, and on
the button front of meter cases.
A mimic bus shall be mounted on the front of the station control
boards. The bus shall be metallic or plastic it shall be fastened by
stick fasteners and shall be easily removable. Buses shall be color
coded identical to which already installed.
The mimic bus shall indicate the actual arrangement of the
initial installation bus shall be designed for easy modification to
future arrangement.
٤٦٦ Relays
All relays shall conform to the BS 142. or relevant IEC standards
and such national standards as may be appropriate in the country of
manufacture and numerical type. However, the requirements of the
standards (of country of manufacture) shall in no case be inferior
to their counter parts in BS or IEC. In any case, the copy of the
specification should be furnished along with the Tender for
Engineer's approval.
In considering the relay equipment, method of mounting and
accommodation, account shall be taken of the fact that Iran lies in
an "earthquake belt" and for design purposes, it shall be assumed
that all of shocks at ground level can achieve 0.35 g.
Individual relays shall, as a minimum, satisfy the numerical
values quoted in appendix "F" of BS 142, and the Contractor shall
furnish type test certificates for each equipment as appropriate.
All protective relays shall be in draw out cases with built in
test facilities. Necessary test plugs shall be supplied loose and
Shall be included in Contractor's scope of supply. Test blocks and
switches shall be located immediately below each relay for testing.
Unless otherwise specified, all auxiliary relays and timers shall be
supplied in non draw out cases.
All AC relays shall be suitable for operation at 50 Hz for V.T.
secondary and C.T. secondary as specified in single line diagram. DC
auxiliary relays and timers shall be designated for the DC voltage
specified in the respective single line diagram and shall operate
satisfactorily between 80% to 110% of the rated voltage, voltage
operated relays shall have adequate thermal capacity for continuous
operation.
All protective relays shall be provided with at least two pairs
of potential free output contacts. Additional contacts shall be
provided where required. auxiliary relays and timers shall have
pairs of contacts as required for the function. Contacts shall be
silver faces with spring action.
Protective relays shall be provided with operation indicators,
externally reset table from the front of the relay. Loading
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٣ / ٩٠
resistors shall be furnished where needed to ensure reliable target
operation. Auxiliary relays shall be provided to permit duplicate
targeting at a remote location.
Timers shall be of the electro-magnetic or static type. Pneumatic
timers are not acceptable.
No control relay, which shall trip the power circuit breaker when
the relay is de-energized, shall be employed in the circuit.
Provision shall be made for easy isolation of trip circuits of
each relay for the purpose of testing and maintenance.
Auxiliary seal-in units provided on the protective relays shall
preferably be shunt reinforcement type. If series relays are used,
the following shall be strictly ensured.
The operating time of the series seal-in unit shall be
sufficiently shorter than the trip coil or trip relay in series with
which it operates to ensure definite operation of the flag indicator
of the relay.
Seal-in unit shall obtain adequate current for operation when one
or more relays operate simultaneously.
Impedance of seal-in unit shall be small enough to permit
satisfactory operation at the trip coils or trip relay when the DC
supply voltage is minimum.
All transistorized protective relays shall be able to withstand
the high voltage interference which is normally experienced in high
voltage switching stations.
In order to minimize high voltage surges to acceptable levels,
the station multi core cables shall be lead sheathed and earthed
according to the latest standards for light voltage switching
stations.
All transistorized protective relays which receive their DC from
the station battery shall use DC/DC converters which meets over
voltage tests, impulse test, H.V. interferences etc. as rigorous as
those specified for transistorized relays.
٤٦٧ Recorders, Meters, Annunciators and Instruments
All instruments for front mounting on the panel shall be semi-
flush mounted, back connected, dustproof, switch-board type with
rectangular cases, removable covers, transparent windows and with
provision for sealing where applicable.
Meter elements, specially those requiring testing and adjustment
shall be provided in draw out type cases fitted with devices to
automatically short circuit the current circuits and where
applicable, to provide for interruption of the tripping circuit.
All meters required for revenue metering shall have metering
accuracies of the at least 0.5 percent. All statistical meters
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٤ / ٩٠
supplied shall have a minimum accuracy of 1.5 percent of full scale.
All meters for revenue purposes shall be unidirectional type.
The dimension of the recorder (voltage, frequency and power
recorders where required and their paper graduations should be such
that a minimum of one tenth of nominal rated values can be read
easily, but however it should not exceed 96 mm x 96 mm. The Pointer
of the recorders should be sensitive enough to respond, that is give
an indication, to a magnitude of the initiating signals equal to and
less than 2% rated values.
Wiring of all components and contacts to the terminal blocks, for
external connections, is included.
AC inputs can be isolated from the relay and test equipment
connected without open circuiting the current supply.
Trip circuits are opened but the DC supply is maintained, where
applicable, for testing of the relay.
AC quantities can be injected in to the relay from portable test
equipment.
All meters shall be large dial rectangular type with dimension of
96 mm x 96 mm and covers shall be of a non reflecting glass type.
Final scales and ranges of instruments, where such scales are not
already detailed in this Specification are to be given later.
Annunciators for the control boards shall be relay type suitable
for N/O and N/C alarm condition and have the following operational
sequences.
(١) Lamp Test
Upon closing of the lamp test button contacts, all lamps on the
panel shall be energized. Lamps shall be de-energized upon release
of the test button.
٨$٦$٤ Switches
Circuit breakers shall be controlled and indicated by discrepancy
control switches forming part of the mimic diagram. The change of
state of circuit breaker or disconnect switch shall cause its
discrepancy control switch light to flash.The indication of change
of state will be accepted by turning the discrepancy switch manually
into the position of agreement with the substation switch.
All switches shall be of the rotary type with silver plated self
cleaning contacts and rectangular dials on which function positions
are clearly indicated.
Switches shall be suitable for interrupting the trip and close
currents of the circuit breaker control circuits without requiring
the use of interposing relays. Position indicator for disconnect
switches shall be similar, but visually differentiated from, the
circuit breaker control switched.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٥ / ٩٠
A local/supervisory switch shall be provided and mounted on a
control panel to perform the following duty:
(١) When in the local position:
(٢) Disable all operations initiated by contacts in supervisory equipment provided by others.
(٣) When in the "supervisory" position:
− Disable all operations initiated by control switches in the stations control room (operation of devices with local
control switch shall not be affected).
− Disable all audible alarms in the station control room.
− The switch lights should indicate these positions.
٤٧. INSPECTION AND TESTS
Perform all inspection, type tests and routine tests stipulated
in applicable standards to ensure that the material and workmanship
confirm to the specification and drawings.
Give access to Owner's representative to the works to determine
or assess compliance with the provisions of this specification or to
witness the Contractor's inspection.
Produce a certification of the compliance of the equipment with
the type and routine tests stipulated in the applicable standards.
Include the following tests:
(١) Operation of all meters and relays using single phase or three phase supply as required; operation of relay contacts using
the appropriate DC supply.
(٢) Energizing of all low voltage control circuits using the
appropriate voltage supply, and testing for operation and
sequence of operation including polarity tests where required.
(٣) Di-electric strength test according to IEC standard.
(٤) Continuity of all low voltage circuits.
Satisfactory evidence of the successful performance of such tests
is required.
EAPGMCo. reserves the right to have representative present during
final shop and functional testing. The Contractor shall advise the
date of test at least sixty (60) days in advance.
٤٨. SUPERVISION OVER INSTALLATION AND ERECTION
Supervise over installation, erection and commissioning of panels
in accordance with the drawings and manufacturer's instruction to
ensure satisfactory and proper operation in every respect.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٦ / ٩٠
Perform visual inspection to insure that there is no damage. This
supervision and inspection shall cover but not be limited to the
following:
(١) Install, level, align panels and fasten to floor and adjacent panels.
(٢) Remove shipping blocks and braces.
(٣) Clean interiors.
(٤) Examine Connections to ensure that they are not loose,
tighten as required.
(٥) Interconnect panels and install cables.
(٦) Touch up all damaged paintwork.
(٧) Inspect, make necessary adjustments, field test, and place the equipment in commercial service.
(٨) Notify Engineer in writing as soon as installation of the equipment is complete.
(٩) On completion of the installation carry out testing of the equipment which is in accordance with a program that has been
approved by EAPGMCo. Carry out all tests in co-operation with
and in the presence of Engineer subject to the requirements
and operating conditions of the EAPGMCo. system.
(١٠) Perform field tests to include but not limited to the
following:
١$١٠) Continuity test of all
low voltage circuits.
٢$١٠) Meggering on all low
voltage circuits.
٣$١٠) Energizing of all low
voltage circuits.
٤$١٠) Check of the operation
of all meters, relays, instruments, alarm and trips.
٥$١٠) Timing tests.
٦$١٠) Functional testing of
all equipment.
Provide all instruments and equipment required for the site
acceptance tests. These instruments will remain the Contractor's
property and can be removed after the successful completion of the
tests.
٤٩. SPARE PARTS
Mandatory spare parts shall be provided as per relevant schedule
of prices for this section.
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٧ / ٩٠
The tendered shall recommend any additional spare parts
considered necessary.
٤١٠. MEASUREMENT AND PAYMENT
Payment of this section excluding its spare parts will be a lump
sum and will be made in accordance with schedule of prices.
For spare parts of this section payment will be unit price and
will be made in accordance with schedule of prices.
Spare part List:
Equipment Type Minimum Functions Quantity
Relay Motor Feeder Diff./Rev./OC/EF 1 Set
Relay Motor Feeder Rev./OC/EF 1 Set
Relay Incoming OC/EF 1 Set
Relay Coupling / Tr. Feeder OC/EF 1 Set
Relay Voltage Protection U/O Voltage 1 Set
Equipment Quantity
Trip Relay 5
Lockout Relay 5
Trip Circuit Supervision 5
Auxiliary Relay 10
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٨ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٦٩ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧٠ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧١ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧٢ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧٣ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧٤ / ٩٠
SPECIFICATION
SECTION 4 – CONTROL & PROTECTION
٧٥ / ٩٠
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
٧٦ / ٩٠
SCHEDULE OF TECHNICAL INFORMATION
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Medium Voltage Indoor Switchgear Switchgear Cubicle
٧٧ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Indoor or outdoor installation 4 Number of phases 5 Number of bus bars 6 Rated voltage kV(rms) 7
Rated insulation level(at IEC service conditions):
Rated 1 min. power frequency withstand voltage kV(rms)
Rated lightning impulse withstand voltage kV(rms)
8 Rated normal current of circuits:
Bus bar & bus-coupler feeder A(rms)
Transformer feeder A(rms)
Outgoing feeder A(rms)
9 Rated short-time withstand (I th) current
kA(rms)
10 Rated duration of short circuit S 11 Rated peak withstand current kA (peak) 12 Pot head type and manufacturer 13 Current transformer type and manufacturer 14 Current transformer burden and accuracy 15 Current transformer ratio
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Medium Voltage Indoor Switchgear Switchgear Cubicle
٧٨ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
16 Voltage transformer type and manufacturer 17 Voltage transformer burden and accuracy 18 Voltage transformer ratio 19 Ground switch type and manufacturer 20 Ground switch type of mechanism 21 Ground switch type of interlock 22 Ground switch number and type of auxiliary switch 23 Ground switch type of blade 24 Type and rating of fuses for voltage transformer
circuits:
Primary H.V. fuses A
Secondary L.V. fuses A
25
Degree of protection for the enclosure and partitions For the enclosure Between LV+HV compartments
26 Cubicle weight
Incoming Kg
Bus-coupler Kg
Outgoing Kg
27 Cubicle shipping weight including circuit breaker kg
kg
28 Cubicle dimensions (LxWxH) cm³ 29 Earthquake protection(coefficient of g) 30 Type of metal enclosed switchgear
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Circuit Breakers for Medium Voltage Switchgear General
٧٩ / ٩٠
ITEM
DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Applicable technical standards
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Circuit Breakers for Medium voltage Switchgear Rated Values and Characteristics:
٨٠ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Indoor or outdoor installation 2 Number of phases 3 Number of poles 4 Rated Voltages kV(rms) 5 Rated frequency Hz 6
Rated insulation level(at IEC service conditions):
Rated 1 min. power frequency withstand voltage
kV(rms)
Rated lightning impulse withstand voltage
kV(peak)
7 Rated normal current(at IEC service conditions): A(rms) 8 Rated short-circuit breaking current kA(rms) 9 Rated duration of short circuit S S
10 Rated line-charging breaking current A(rms) 11 Rated cable-charging breaking current A(rms) 12 Rated small-inductive breaking current A(rms) 13 First pole to clear factor 14 Rated transient recovery voltage (TRV)for terminal
faults kV(rms)
15 Rated characteristics for short-line faults kA(rms) 16 Rated short-circuit making current kA(rms) 17 Rated out-of-phase breaking current
kA(rms)
18 Rated operating sequence
19 Rated time quantities: Rated opening time ms Rated break time ms ms Rated closing time ms ms Rated make time ms ms Max. time interval between opening of first and last phase of three phase circuit-breaker
ms
Closing time from energization of close coil to latching of circuit breaker in fully closed position ms
ms
20 Max. temperature rise under rated load condition ˚C °C 21 Max. peak value of switching over voltage when
interrupting rated line charging current
22 Voltage drop across terminals of a phase at 100 A DC
23 Breaking current(Asymmetrical) A 24 Number of NO & NC auxiliary contacts
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Circuit Breakers for Medium voltage Switchgear Construction features:
٨١ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Type of circuit breakers(sf6 or vacuum) 2 Mass of complete circuit breaker 3 Creepage to earth over insulation 4 Minimum clearances:
Between phases mm
Between live parts to earth mm
5 Overall dimension of the installation
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Circuit Breakers for Medium voltage Switchgear Operating Mechanism of Circuit-Breaker and Associated Equipment
٨٢ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Type of operating mechanism(spring) 2 Rated supply pressure N/m2 3 Quantity of free gas for operation 4 Power supply for operating mechanism and control
voltage
5 Current and power for operating A,W 6 Operating times(of operating devices) ms 7 Trip coil current and number of trip coil A,No. 8 Trip coil rated max./min. voltage V 9 Closing coil current A
10 Closing coil rates max./min. voltage V 11 Special interlocking requirements 12 Type and number of auxiliary contacts 13 Power supply for auxiliaries 14 Number of operating cycle permissible before
inspection and maintenance of contacts and other essential parts:
At 50% rated current
At rated current
At 50% short circuit current
At rated short circuit current
15 Type of main contacts 16 Type of arcing contacts 17 Type of arc control device 18 Details of spring charging motor 19 Type of motor 20 Power consumption W 21 Rated voltage V 22 Speed at rated output R.P.M. 23 Class of insulation 24 Time required by motor to charge the spring
completely S
25 Motor full load current A 26 Maximum starting current A 27 Rating of protection fuses A 28 Type of starter and rating
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Incoming Cubicles
٨٣ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Rated secondary current A 4 Rated primary current for different taps(multi ratio)
Core 1 A
Core 2 A
Core 3 A 5 Burden and accuracy class(specify the values for
relevant parameters in each class, e.g. ALF for class P, Vµ , Ie & Rct for class X,etc.)
Core 1
Core 2
Core 3 6 Type of CT(oil immersed, dry) 7 Class of CT(outdoor, indoor) 8 Rated transformation ratio 9 Rated short time thermal current(1,3 sec) kA(rms)
10 Rated short time dynamic current kA(peak) 11 Rated frequency Hz 12 Pollution level mm/kV 13 Type of primary winding(single turn or multi turn)
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Incoming Cubicles
٨٤ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
14 Insulation level(at IEC service conditions):
Nominal service voltage kV(rms)
Rated voltage (max.) kV(rms)
Rated lightning impulse withstand voltage kV(peak)
Rated one minute power frequency withstand voltage
kV(rms)
15 Rated continuous thermal(% of rated primary current)
16 Time permitted with open circuited secondary S 17 Voltage of secondary winding terminals with
normal primary load current, secondary open circuit V
18 Design altitude above sea level M 19 Temperature rise at rated burden above following
ambient temperature
40 ˚C
45 ˚C
50 ˚C
55 ˚C
20 Type of protective device, if any, to limit voltage in item 17 above
21 Overall dimensions(HxWxL) mm 22 Total weight of a single phase CT
kg
23 Material of conducting parts:
Primary windings
Secondary windings
24 Type of terminal connectors 25 Power frequency withstand voltage on each
secondary windings kV(rms)
26 Max. partial discharge at 1.1/√3 rated pC
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Outgoing Cubicles
٨٥ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Rated secondary current A 4 Rated primary current for different taps
Core 1 A
Core 2 A
Core 3 A 5 Burden and accuracy class(specify the values for
relevant parameters in each class, e.g. ALF for class P, Vµ , Ie & Rct for class X,etc.)
Core 1
Core 2
Core 3 6 Type of CT(oil immersed, dry) 7 Class of CT(outdoor, indoor) 8 Rated transformation ratio 9 Rated short time thermal current(1,3 sec) kA(rms)
10 Rated short time dynamic current kA(peak) 11 Rated frequency Hz 12 Pollution level mm/kV 13 Type of primary winding(single turn or multi turn)
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Outgoing Cubicles
٨٦ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
14 Insulation level(at IEC service conditions):
Nominal service voltage kV(rms)
Rated voltage (max.) kV(rms)
Rated lightning impulse withstand voltage kV(peak)
Rated one minute power frequency withstand voltage
kV(rms)
15 Rated continuous thermal(% of rated primary current)
16 Time permitted with open circuited secondary S 17 Voltage of secondary winding terminals with
normal primary load current, secondary open circuit V
18 Design altitude above sea level m 19 Temperature rise at rated burden above following
ambient temperature
40 ˚C
45 ˚C
50 ˚C
55 ˚C
20 Type of protective device, if any, to limit voltage in item 17 above
21 Overall dimensions (HxWxL) mm 22 Total weight of a single phase CT
kg
23 Material of conducting parts:
Primary windings
Secondary windings
24 Type of terminal connectors 25 Power frequency withstand voltage on each
secondary windings kV(rms)
26 Max. partial discharge at 1.1/√3 rated pC
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Bus-Coupler Cubicles
٨٧ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Rated secondary current A 4 Rated primary current for different taps
Core 1 A
Core 2 A
Core 3 A 5 Burden and accuracy class(specify the values for
relevant parameters in each class, e.g. ALF for class P, Vµ , Ie & Rct for class X,etc.)
Core 1
Core 2
Core 3 6 Type of CT(oil immersed, dry) 7 Class of CT(outdoor, indoor) 8 Rated transformation ratio 9 Rated short time thermal current(1,3 sec) kA(rms)
10 Rated short time dynamic current kA(peak) 11 Rated frequency Hz 12 Pollution level mm/kV 13 Type of primary winding(single turn or multi turn)
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Current Transformers Bus-Coupler Cubicles
٨٨ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
14 Insulation level(at IEC service conditions):
Nominal service voltage kV(rms)
Rated voltage (max.) kV(rms)
Rated lightning impulse withstand voltage kV(peak)
Rated one minute power frequency withstand voltage
kV(rms)
15 Rated continuous thermal(% of rated primary current)
16 Time permitted with open circuited secondary S 17 Voltage of secondary winding terminals with
normal primary load current, secondary open circuit V
18 Design altitude above sea level m 19 Temperature rise at rated burden above following
ambient temperature
40 ˚C
45 ˚C
50 ˚C
55 ˚C
20 Type of protective device, if any, to limit voltage in item 17 above
21 Overall dimensions (HxWxL) mm 22 Total weight of a single phase CT
Kg
23 Material of conducting parts:
Primary windings
Secondary windings
24 Type of terminal connectors 25
Power frequency withstand voltage on each secondary windings
kV(rms)
26 Max. partial discharge at 1.1/√3 rated pC
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Potential Transformers
Incomming cubicles
٨٩ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Rated primary voltage kV/√3 4 Rated secondary voltage V/√3 5 Rated burden of winding VA 6 Rated frequency Hz 7 Highest system voltage kV(rmms) 8 Rated voltage factor:
Continous
30 seconds
9 Insulation level(at IEC service conditions):
Rated lightning impulse withstand voltage kV(peak)
Rated one minute power frequency withstand voltage
kV(rms)
10 Power frequency withstand voltage between secondaries and secondary to earth
kV(rms)
11 Rated transformation ratio 12 Number of secondary winding 13 Accuracy class for each winding 14 Continuous thermal burden of secondary winding VA 15 Total continuous thermal burden of secondary
winding VA
16 Permissible secondary short circuit time with rated voltage maintained on primary terminals
S
17 Short circuit impedance Ω 18 Temperature rise at rated burden above following
ambient temperature
40 ˚C
45 ˚C
50 ˚C
55 ˚C 19 Designed for Min. to Max. ambient temperature ˚C 20 Designed altitude above sea level m 21 Method of suppressing ferro resonance phenomena 22 Overall dimensions(HxWxL) mm 23 Total weight of a single VT kg 24 Material of conducting parts 25 Max. partial discharge at 1.1/√3 rated voltage pC
SCHEDULE OF TECHNICAL INFORMATION (INFORMATION TO BE SUPPLIED WITH TENDER)
Potential Transformers
Incomming cubicles
٩٠ / ٩٠
ITEM DESCRIPTION TECHNICAL
PARTICULERS
1 Manufacturer’s name and country 2 Manufacturer’s type designation 3 Rated primary voltage kV/√3 4 Rated secondary voltage V/√3 5 Rated burden of winding VA 6 Rated frequency Hz 7 Highest system voltage kV(rmms) 8 Rated voltage factor:
Continuous
30 seconds
9 Insulation level(at IEC service conditions):
Rated lightning impulse withstand voltage kV(peak)
Rated one minute power frequency withstand voltage
kV(rms)
10 Power frequency withstand voltage between secondaries and secondary to earth
kV(rms)
11 Rated transformation ratio 12 Number of secondary winding 13 Accuracy class for each winding 14 Continuous thermal burden of secondary winding VA 15 Total continuous thermal burden of secondary
winding VA
16 Permissible secondary short circuit time with rated voltage maintained on primary terminals
S
17 Short circuit impedance Ω 18 Temperature rise at rated burden above following
ambient temperature
40 ˚C
45 ˚C
50 ˚C
55 ˚C 19 Designed for Min. to Max. ambient temperature ˚C 20 Designed altitude above sea level m 21 Method of suppressing ferro resonance phenomena 22 Overall dimensions(HxWxL) mm 23 Total weight of a single VT kg 24 Material of conducting parts 25 Max. partial discharge at 1.1/√3 rated voltage pC