Technical Part Part-1Design, Supply, testing, commissioning and
guarantee of Silent type 500 kVA / 400 kW (Prime rating), 3 phase,
415 volt, 50 Hz Diesel Generator sets-4 nos.(complete with
radiator, acoustic enclosure, anti-vibration mount/pad, Electronic
governing system, electronic control panel, AMF control panel, with
all necessary piping, power & control cable etc.)
Page 1 of 32
SPECIFICATION OF 500 kVA /400 kW DIESEL ENGINE SETS WITH ALL
REQUIRED ACCESSORIES
INDEXSr. No. 01 02 03 04 05 06 07 08 09 10 Scope General
Requirements for Technical Qualification Codes & standards
Technical Requirements for Performance of work Training Technical
Specifications Tests and inspection Engineering, Manufacturing
& Maintenance facility Drawing & Data sheets Technical Data
to be filled by Tenderer 29-31 of 31 26-27 of 31 28 of 31
Description Page No. 3-4 of 31 4 of 31 5 o 31 6-24 of 31 25 of
31
Page 2 of 32
1.0 SCOPE:The scope of this specification is to define the
requirements of supply, installation, testing, commissioning and
guarantee for intended operation of 500 kVA (Prime rating) Diesel
Generator Sets with radiator, acoustic enclosure, anti-vibration
mounts, diesel tanks, AMF control panel, all required accessories
and its hook up with existing system in place of 310 kVA DG sets at
HWPK. 1.1 Dismantling, shifting and safe deposit of existing 310
kVA indoor DG sets-4 nos. with Diesel Engine- W8V 17.5/22AMA of
Kirloskar oil engine ltd. make and Alternator- 310 kVA/248 kW, YTS6
type-3 nos. and 6AX 450/2 1000- 1 nos. of Kirloskar Electric Co.
Ltd. make, one-by-one after ensuring availability of emergency
supply from existing location to our central store. Each DG set
mainly consists of Diesel engine with governor & fly wheel
arrangement, Alternator, day tank (1200 litre), fresh water tank
(100 liter), existing exhaust piping (approx. 8 meters) with
silencer & turbo charger, AMF panel, jacket water & lub oil
heat exchanger with their connecting piping from DG set, Lube oil
priming pump with motor, Engine jacket water circulating pump motor
& heater, self starter with 24 volt, 200 Ah battery-4 nos. etc.
1.2 Dismantling of existing RCC foundations and structures of old
DG sets, day tank, heat exchangers etc. Design & construction
of new RCC (Reinforced Cement Concrete) or any other suitable
foundation for 500 kVA DG sets, day tank, radiator, AMF panel,
support piping & structure etc. as required for installation of
new DG sets & its accessories. Vibrating isolators (AVMs) /
anti vibration pad to be provided to reduce generator set vibration
and noise transmission to the surrounding structure. Supply of
construction materials, structural materials and all consumables
items, tools & tackle etc. for foundation shall be in suppliers
scope. 1.3 Design, supply of materials & construction of 3 hour
rating fire resistant wall in between DG sets and in between HSD
tanks. 1.4 Supply, testing, installation, commissioning and
guarantee of 4 nos. of Silent type 500 kVA Diesel Generator Sets
complete with their radiator (water cooled), acoustic enclosure (as
per latest CPCB norms), anti vibration mount/pad, turbocharger,
exhaust manifold with silencer, Electronic governing system,
Electronic control panel, self starting arrangement with 24 volt
battery suitable for 6 consecutive starting attempts, Flywheel
arrangement, HSD day tank, AMF control panel with Power controller,
electrical analyzer unit & digital automatic voltage regulator.
Supply & installation of piping for hook up of cooling system
& make up water from existing header, lube. Oil system, fuel
system from HSD tank to DG & from existing header to HSD tank.
Laying of FRLS power & control cables for connection of DGs
with existing switch gear. 1.5 Supply, installation, wiring and
hook up of Protection CTs (current transformer)-8 nos and measuring
CTs-4 nos. for each 500 kVA DG sets in place of existing CTs of 310
kVA DG sets with relays & metering devices. Dimension &
other details for design of CTs is enclosed. 1.6 Supply,
commissioning and hook up of Central Monitoring System consists of
PLC based centralized data logging system with redundant processor,
workstation loaded with suitable SCADA/HMI software, communication
network with driver software & full licenses (original
version), PC with 250 GB HDD, LCD colour monitor 17, Laser B/W A4
size printer and ups (see 4.5.0 for details specifications). It
needs to be communicating with individual instrument control
panels/ Power controller/ energy analyzer/ PLC of respective
generators to generate utility reports from the data logged during
operation of DG sets as per HWPK requirements. The local instrument
panels / power controller / energy analyzer have to be provided
with Ethernet/ Modbus/ Other suitable communication facility in
order to integrate with the central monitoring system.
Page 3 of 32
1.7 Supervision during testing & commissioning shall be
taken up under control of DG sets manufacturer engineer. This
supervision during installation, testing and commissioning shall be
considered as included in scope of all items. The supervision
during installation, testing and commissioning of DGs is in the
scope of the supplier and no extra charge shall be paid for
deputation of manufacturers engineer. Suppliers site engineer shall
ensure that installation job is done as per good engineering
practice, tender specification and approved drawings. 1.8 The
Bidder shall provide necessary supporting document for seeking
clearances/approvals of Pollution Control Board (PCB) / Central
Electricity Authority (CEA) / Atomic Energy Regulatory Body
(AERB).
2.0 GENERAL REQUIREMENTS FOR TECHANICAL QUALIFICATION:Apart from
meeting technical specifications laid in subsequent pages of
tender, following shall also be necessary to qualify for technical
part of tender. 2.1 The bidder shall be Original Equipment
Manufacturer (OEM) or Authorized dealer of Manufacturer. The
offered equipment have to be designed, manufactured and tested as
per relevant IS / ISO /IEC / IEEE standards with latest amendments.
2.2 DG sets manufacturer should have established manufacturing
facility of similar type of Diesel Generator sets since last five
(5) years and shall support for servicing and spares for minimum 20
years of operational life of DG sets. 2.3 The bidder should clearly
indicate the quantity and Highest Single Value Contract executed
during last FIVE (5) years, for the offered equipment. Bidder
should have executed one single contract during last five years for
the quantity equivalent to tender / bid. 2.4 They must have
executed at least three orders of supply, erection &
commissioning of Diesel Generator sets of similar capacity
successfully with Govt. organization, public sector or major
reputed Indian private sector organization. They should submit
performance certificate for their installation obtained from any
two of above organization. 2.5 Independent assessment of
performance of commissioned DG sets shall be done by HWPK also for
qualifying technical part. 2.6 The bidder shall furnish the list of
earlier installation as per requirement mentioned in Para 2.2 and
2.3 with detailed address and telephone no. etc. for independent
assessment.
Page 4 of 32
3.0 CODES AND STANDARDS:The equipment shall conform to the
latest issue of the relevant Indian Standard Specifications or the
ISO/IEC/IEEE specifications, wherever applicable. Some of the
relevant standards are listed below: IS-456 IS-2974 IS-3809
ISO-3046 ISO-8528 IS-10000 IS-10002 IS 3034 IS-12065 IS-12075
IS-8183 : : : : : : : : : : : : Plain and Reinforced concrete-code
of practice Design and construction of machine foundations-code of
practice Fire resistance test of structures Definition and Rating
of Diesel engine Specification & definition of prime power
rating, noise level, governor regulation of Diesel engine Method of
tests for Internal combustion engine Specification for constant
speed compression (Diesel) engine Environmental (Protection) Rules,
1986 latest amendment/ schedules for noise & emission limit of
DG sets. Code of practice for fire safety of industrial buildings
electrical generating and distributing stations. Permissible limits
of noise levels for rotating electrical machines Limits of
vibration severity of rotating electrical machines Insulating
material for better attenuation
IER-1956 : Indian electricity rule-1956 IE Act The Indian
Electricity Act 1910/Indian Electricity Supply Act-1948/Electricity
Act: 2003. IS-4722 : Rotating Electrical Machine specification
IS-4728 : Terminal marking and direction of rotation for rotating
electrical machinery IS-7132 : Guide for testing synchronous
machine IS-4691 : Degree of protection provided by enclosures for
rotating electrical machinery IS-2165 : Guide for insulation
coordination IS-3043 : Code of practice for earthing IS-2032 :
Graphical symbols used in electric technology IS-13947/
Specification for Low Voltage Switchgear and Control gear :
IEC-60947 IS-10118 Code of Practice for Selection, Installation and
maintenance of switchgear and : control gear IS-3072 : Code of
practice for installation and maintenance of switch-gear up to 1000
V. IS-2705 : Current Transformer Specification IS-3156 : Voltage
Transformer Specification IS-732 : Code of practice for electrical
wiring installations up to 650 volts IS-1554 Part-1 IS-7098 Part-1
IS-3842 IS-8686 IEC-60255 IS-14570/ IEC 688 : : : : : : PVC
insulated (heavy duty) electric cables for working voltages up to
and including 1100 volts Cross linked polyethylene insulated PVC
cables for working voltages up to and including 1100 volts
Application guide for Electrical relays for ac system Specification
for static protection relays Testing & specification for
microprocessor relay Electrical measuring transducer for converting
a.c. electrical quantities to analogue or digital signals
Page 5 of 32
4.0 TECHNICAL REQUIREMENTS FOR PERFORMANCE OF WORK:4.1.0
Technical requirement of Dismantling, shifting and safe deposit
of existing 4 nos. of 310 kVA DG sets with their
auxiliaries:4.1.1 The dismantling, shifting and safe deposit of the
existing four nos. of diesel generator sets shall be performed one
by one. 4.1.2 One by one means complete dismantling of one no. of
DG set with auxiliaries and second DG set shall be dismantle only
after commissioning & satisfactory operation of new 500 kVA DG
set with existing switchgear at this location. After installation
of two DG sets remaining two can be taken simultaneously subject to
satisfactory performance of first two. 4.1.3 Each 310 kVA DG set
consist of following items: a) Diesel Engine - Kirloskar oil engine
ltd. make, rating of 372 BHP (at 1000 rpm), W8V 17.5/22AMA type,
overall Dimension is (in mm) 2030 x 750 x 1300 (Length x Breadth x
Height) , eight cylinder, four-stroke inline turbo charged engine
with mechanical governor & flywheel arrangement.b) Alternator -
Kirloskar Electric Co. Ltd. make, model YTS6 type- 3 nos. , overall
dimension is ( in mm)1310 x 1400 x 930 (Length x Breadth x Height)
and 6AX 450/2 1000- 1 no., 310 kVA 248 kW, 3 Phase, 4 wire, 50c/s,
1000 rpm. overall dimension is ( in mm)1240 x 1200 x 1130 (Length x
Breadth x Height) c) Fuel Oil Tank - Approx. 1200 liter capacity MS
tank. d) Fresh Water Tank - Approx. 100 liter capacity MS tank. e)
AMF Panel - Consisting of Indicating meters, fuses, Power &
control relays, Aux. contactors, excitation system, battery
charging system etc. f) Self starting arrangement - Self Starters
with Batteries (Lead Acid) - 12 volts, 200 Ah 4 Nos. with
connecting cables from starter to batteries. g) Jacket water Heat
exchanger - 1 no., Jacket water circulating pump with motor- 1 no.,
jacket water heater- 1no. & their connecting piping from heat
exchanger to Diesel engine, from cooling water header to heat
exchanger etc. h) Lub. Oil heat exchanger - 1 no., Lub oil priming
pump with motor-1no. & their connecting piping from heat
exchanger to diesel engine and vice versa etc. i) Existing exhaust
piping (approx.8 mtrs) with silencer, turbo charger and supporting
structures. j) All supporting structures of fuel oil tank, fresh
water tank, heat exchangers, exhaust piping, lube oil & fuel
oil piping.
4.1.4 At the time of dismantling of DGs fresh HSD from tank and
used HSD from diesel engine shall be emptied in drums provided by
purchaser. 4.1.5 At the time of dismantling of DGs used lube oil
shall be emptied in drums provided by purchaser. 4.1.6 The
Contractor shall install safety caps/end plugs/flanges to the fuel
lines & water lines as necessary before removing/dismantling
the fuel/water lines from headers.4.1.7 All types of special tools
& tackles etc. required for dismantling & shifting of
materials shall be arranged by party. 4.1.8 The Contractor shall
remove all equipments/materials/oil etc. associated with the
existing diesel generator equipment as mentioned above. The
Contractor shall properly deposit all materials in our store at
place assigned by HWP (K).
Page 6 of 32
4.2.0 Technical requirement of civil work: Dismantling of
existing RCC foundation of 310 kVA DG sets (4nos.) and preparation
of new foundation for installation of 500 kVA DG sets 4 nos.4.2.1
The dismantling and preparation of new foundation of the existing
four nos. of diesel generator sets shall be performed one by one
(see 4.1.2 also). 4.2.2 Each existing DG sets having RCC foundation
(in cm): (a) 300x30x50 (Length x Breadth x height) 2 nos. (b) 50
x25 x 10- 2 nos. & (c) 110 x 110x 4- 1no. 4.2.3 The existing
concrete pads / foundation of DG sets as mentioned above shall be
fully dismantle below surface level (up to depth of 300 mm) for
proper bonding of new foundation. 4.2.4 The new foundation for
Diesel Generator set shall be formed in accordance with the
IS-2974. Depth of foundation should be designed considering weight
of 500 kVA DG set with acoustic enclosure. 4.2.5 The length and
breadth of foundation should be at least 150-300 mm (6-12) more
than base length and breadth of equipment. Foundation height should
be about 100-150 mm above ground level to maintain cleanliness
around DG set. 4.2.6 Foundation should be designed with necessary
pocket for grouting of anchoring bolt/ isolators springs etc. as
required for installation of Vibrating isolators (AVMs) / anti
vibration pad for installation of DGs. Foundation of DG sets shall
qualify for seismic zone-II with post seismic importance factor of
1.5. 4.2.7 Requirement of dimension (depth etc.), type/ design of
RCC / AVMs as necessary shall be finalized during technical
discussion after opening of technical bid. In case bidder offers
altogether different foundation arrangement it shall also be
accepted subject to meeting the vibration, noise, vibration
transmission and critical speed suitability criteria as per
relevant standard. 4.2.8 All areas under and adjacent to the
foundation shall be well cleaned prior to pouring of concrete. The
surface except the pockets for grout shall be made rough so as to
secure good bond with fresh cement. Cement grout with
non-shrinkable additive shall be used where structurally required.
4.2.9 All surfaces other than main foundation to be chipped/
cleaned for finishing/ recoating of the surface/floor. 4.2.10 All
civil works for installation of HSD Tank, radiator, structural
support for anchoring of piping, vents, exhaust chimney etc. in the
bidders scope. 4.2.11 Concrete of M25 or higher grade as per IS-456
shall be used for foundation of machines. The concrete used shall
be of plastic consistency without excessive water. Continuous
concreting shall be done as far as possible for entire block,
leaving provisions for grouting. 4.2.12 Reinforcement may be bent
and fixed in accordance with the procedure indicated in IS-2502.
Annealed steel wire (0.9mm dia or over) may be used for tying
crossing bars. 4.2.13 Construction joints should be avoided. The
finished surface of the foundation shall be leveled before
installing the machine. 4.2.14 The fundamental natural frequency of
foundation of DG sets shall be at least 20 percent away from the
machine operating speed. Dynamic analysis, vibration analysis,
static analysis, grade of concrete, reinforcement steel etc. shall
be as per IS-2974.
Page 7 of 32
4.2.15 Shuttering material shall have smooth and even surface
and the joint shall not permit leakage of cement grout. All surface
of shuttering, in contact with concerts, shall be treated with a
nonstaining mineral oil or other approved material to prevent
adhesion with concrete and protect reinforcement also. 4.2.16 The
required routing/ lay out for cable racks, trenches shall be worked
out. Main cable trench 600 mm wide is available at both side of
existing DG sets. Excavation/ digging & trenches as necessary
for laying & termination of power & control cables, laying
of branch piping etc. required for installation of new DG sets in
the suppliers scope. 4.2.17 Checker plates / trench covers should
be provided for newly make trenches. Brick works/ sand filling to
be done for all excavation/ digging work. Backfilling the cable
trench & making up to the ground level in the suppliers scope.
4.2.18 Supply of all construction materials (cement, concrete,
reinforcement etc.), structural materials (anchoring bolt, angle,
column etc.), all consumables items (nut-bolt, clamps, shims,
cotton etc.) & shuttering materials etc. shall be in the
suppliers scope. 4.2.19 The design, drawings and specification of
foundation shall be approved from Engineer-InCharge before
execution of work.
4.3.0 Technical requirement of Design, supply & construction
of 3 Hour rating fire resistant wall in between DG sets & HSD
day tanks.4.3.1 Fire resistant reinforced concrete wall of minimum
3 hr fire rating has to be formed in between DG sets & in
between HSD tanks. 4.3.2 Concrete aggregates, thickness of
reinforced concrete walls, concrete cover to the reinforcement in
wall shall be calculated considering both side exposed to fire as
per specification of IS-6142 & IS-456. 4.3.3 Height &
length of fire resistant wall (non-load bearing) shall be finalized
on the basis of overall length, height and layout of DG sets &
HSD tank. 4.3.4 Fire resistant wall should have ability to shown
fire stability, fire integrity/ thermal insulation or other
expected duty as specified in standard fire resistance test as per
IS- 3809. 4.3.5 Design and layout of the firewall shall be approved
after placement of purchase order before construction of wall.
4.4.0 Technical Specification of 500 KVA Diesel generator Set- 4
nos. & its auxiliary.4.4.1 Technical requirement of foundation
/ base rail, unloading, shifting for installation of DG sets.
4.4.1.1 Static & dynamic load data of DG sets for foundation
design shall be furnished with detail layout drawing of DG set by
manufacturer for approval. 4.4.1.2 Engine & Alternator shall be
coupled through a flexible coupling and mounted on a factory
designed and tested sturdy steel channel base frame. The base shall
be designed and built to resist deflection, maintain alignment, and
minimize resonant linear vibration. 4.4.1.3 The base frame shall be
free from any defects such as burrs, twists, distortions etc. The
base frame shall then be painted with 2 coats each of red oxide
primer and black synthetic enamel paint to prevent rusting.
Page 8 of 32
4.4.1.4 Provision for lifting (Eye bolts/ pockets) provided on
base frame of the DG sets should be designed considering total
weight to be handled and to maintain the centre of gravity of the
DG sets while lifting. Other than this, eyebolt shall be also
provided on individual major equipment of handling (Diesel engine,
alternator, radiator, acoustic enclosure, tank, AMF panel etc.).
4.4.1.5 Anti-vibration mounting may be used to ensure the vibration
& noise transmission of the DG sets to the surrounding
structure & building within the permissible limit as per IS/
manufactures recommendation. 4.4.1.6 Sufficient no. of suitable
capacity steel spring isolators/ anti vibration mountings (AVMs)
dully approved shall be installed between the base and the mounting
surface. The isolators shall bolt to the base, and have a waffled
or ribbed pad on their bottom surface. The pads shall be resistant
to heat and age, and impervious to oil, water, antifreeze, diesel
fuel, and cleaning compounds. Isolators shall have minimum of 25 mm
deflection and qualify for seismic zone as laid down in IS-1893.
4.4.1.7 The leveling and alignment of foundation shall be carried
out carefully before placing the DG sets. The final grouting of the
base frame and fixing of the mounting bolts of the panels shall be
carried out only after ascertaining perfect alignment and leveling
by the experienced and skilled persons and on clearance from the
engineer in charge. The base frame of DG sets should be leveled
using shims before grouting with foundation. 4.4.1.8 Before
deployment of material handling equipments, chain pulley blocks,
Hook, sling, trolley etc. for erection, shifting & installation
of DG sets & its auxiliaries it is necessary to submit valid
test certificates. Appropriate rating & smooth functioning of
all equipment shall be ensured before start of work. Only
authorized persons should be allowed to operate material handling
equipments. 4.4.2.0 Technical requirement of Acoustic enclosure of
Diesel Generator set. 4.4.2.1 The diesel generator sets are housed
inside a high quality acoustic enclosure of compact, modular &
sleek design with low noise level (75 db) at a distance of 1 meter
as per latest MOEF (Ministry of Environment and forest) / CPCB
(Centre pollution control board) norms. 4.4.2.2 The acoustic
enclosure shall be soundproof, weatherproof, and environmental
friendly consisting of acoustically treated panels from all the
four sides and top. It includes hinged doors on either side for
maintenance of DG set. 4.4.2.3 All the panels should be lined with
fire proof acoustic material light resin rock wool as per relevant
IS. The material shall have more than 48 Kg/m3 density and the
layer shall be 75 mm thick covered in the fiber glass sheet and
perforated powder coated sheet from inside. The outside fabrication
will be made out of 2 mm GI Sheet and with ventilating louvers for
both at the engine side for fresh air entry and for hot air
exhaust. 4.4.2.4 Exhaust silencer should be of domestic grade type
mounted outside the enclosure, exhausting to atmosphere. Exhaust
pipe is to be extended up to height of approx. 8.8 meters as per
CPCB norms. All joints to be sealed with fireproof neoprene gaskets
to withstand temperature and pressure at site conditions. All high
temperature exposed surfaces to be insulated by glass wool with
aluminum cladding up to the silencer. 4.4.2.5 Adequate ventilation
should be provided to meet the air requirements for combustion and
heat removal. A ventilation fan/blower of adequate capacity to meet
the total air requirement and air changes shall be provided.
4.4.2.6 Existing Shutter modification has to be done to accommodate
the inlet & outlet ducts as necessary for air requirement for
ventilation/combustion. Max allowable temp. Shall be 450 C in side
the enclosure.Page 9 of 32
4.4.2.7 Enclosure and layout of the equipment have to design to
facilitate easy access to all serviceable parts and having
sufficient space in and around the DG set for maintenance &
operation of the DG set. The fuel level gauge & engine control
panel (for engine parameter) shall be visible from outside the
enclosure. Drain plugs shall be provided outside the enclosure for
draining lube oil. Handle type locking systems has to be provided
for hinged doors. 4.4.2.8 Arrangement for illumination with 40 watt
tube light type fixtures has to be make. Lights shall be arranged
at both sides of DG sets inside the enclosure. In addition to this
2 nos. of panic lighting shall also provide inside the enclosure on
24 volt DC supply. Lights will be switched from individual MCBs
mounted on control panel cover & have back-up HRC fuse. Two no.
industrial type metallic plug socket (both side of DG). 4.4.2.9
There should be a provision of emergency shut down (by stopping
solenoid) of the diesel generating set (Prime Mover) from outside
the enclosure. 4.4.3.0 Technical requirement of Exhaust system of
Diesel Generator set. 4.4.3.1 The engine exhaust system shall be
installed to discharge combustion gases quickly and silently with
minimum restriction. The exhaust system, including silencer, shall
be designed for minimum restriction, and in no case backpressure
shall exceed 40 mm of Hg. 4.4.3.2 Engine exhaust system shall
include exhaust manifold with muffler, flexible fittings, exhaust
silencer, exhaust piping, elbows, bends, heat insulating
lagging/cladding, supporting dampers, spring, rain trap, thimbles
etc. 4.4.3.3 A stainless steel flexible exhaust fitting shall be
provided to allow for thermal expansion and engine vibration. The
flexible fitting shall include a floating flange on one side to
match the engine exhaust outlet port(s) and bolt pattern and a
fixed flange on the opposite end to match the exhaust silencer
inlet(s). 4.4.3.4 Piping shall be supported and braced to prevent
weight or thermal growth being transferred to the engine. Support
dampers and springs shall be included where necessary to isolate
vibration. Roof height is approx. 7 mtrs. From ground level. First
support shall be within 2.0 meter from exhaust flexible centre
line. 4.4.3.5 The domestic type exhaust silencer shall be sized and
supplied by the engine supplier. It shall be mounted near the
engine at suitable location to optimize silencing &
backpressure to the system. A provision for draining moisture shall
be included. 4.4.3.6 The silencer shall provide extreme noise
attenuation for environments with low background noise. Silencer
shall be pancake style bottom inlet, end outlet style. It should
meet stringent sound emission standards laid down by CPCB / MOEF
notification. 4.4.3.7 Schedule B MS exhaust pipe of minimum 200 mm
dia (8 inch) and long end elbows shall be used. One no. 1/ 8 inch
NPT connection should be provided for measuring exhaust back
pressure during commissioning. 4.4.3.8 Exhaust piping inside the DG
set room should be lagged along with aluminum sheet cladding to
avoid heat input to the room. A rain cap shall be provided to
terminate the exhaust pipe. The distance between exhaust pipe and
rain cap should be higher than diameter of pipe. Horizontal run of
exhaust piping should slope downwards away from the engine to
condensate trap. 4.4.3.9 Use of thimble is necessary while passing
the pipe through concrete wall. The clearance around the pipe in
walls shall be sufficient to allow free movement and expansion/
contraction of piping.Page 10 of 32
4.4.3.10 Emission limit (NOx level, HC, CO etc.) stack height
and noise level shall comply with the guidelines laid down by
MOE&F and any other stipulation of the SPCB and CPCB in this
regard. 4.4.4.0 Technical requirement of HSD storage tank of Diesel
Generator set. 4.4.4.1 The HSD storage tank of Diesel Generator set
shall be installed outside of existing DG building as nearer as
possible with DG set. 4.4.4.2 The capacity of the HSD storage tank
shall be of 1000 liters capacity sufficient for 8 hours full load
continuous operation. It shall be fabricated with minimum 3mm thick
M.S sheet with all standard accessories, which includes breather,
drain plugs for draining diesel complete with drain valve, trough
arrangement to collect spill oil (individually or collectively),
air vent, inlet and outlet pipe connection, and manhole with cover.
4.4.4.3 HSD tank, fuel piping, valve etc. should be free from
leaks. Materials of tank, valve, pipe etc. shall be compatible with
required service and shall not affect the any chemical properties
of HSD (as per IS-1460). 4.4.4.4 Installation of piping for hook up
the fuel system from existing header to HSD tank & from HSD
tank to DG with necessary valve arrangements, non return valve
between HSD tank & Diesel engine & necessary flanges/blinds
etc. 4.4.4.5 Wire mesh filter screen at filling point & fill
neck to allow min.5%expansion space shall be provided. Fuel water
separator shall provide in between fuel tank and fuel filter,
necessary mounting arrangement/drain valve etc. to be provided.
4.4.4.6 The fuel level gauge (10-95%) to be provided visible from
outside the enclosure. Electronic fuel Level transmitter/switches
to be installed and the digital/analog level indication have to be
provided in the control panel and low & high level alarm/trip
at AMF panel. The full level float arrangement has to make to avoid
any spillage of oil. Each diesel engine shall be provided with
on-line fuel flow metering device (calibrated in liter) to monitor
fuel consumption. 4.4.4.7 Fuel tank should be placed on the level
such that fuel outlet point (at bottom of fuel tank) is optimally
above the engine driven booster pump inlet connection. Fuel tank
location should be such that it does not obstruct free movement of
service personnel. 4.4.4.8 Excavation/ digging, trenches, supports,
thimbles / opening in walls as necessary for installation of fuel
system shall be in the suppliers scope. 4.4.4.9 General arrangement
& equipment layout drawings of HSD tank with DG, Isometric /
P&I diagram for complete fuel piping arrangement shall be
submitted for approval before execution of work. 4.4.5.0 Technical
requirement of cooling system of Diesel Generator set. 4.4.5.1 The
generator engine shall have a jacket water-cooling system with a
closed circuit design with provision for filling, expansion, and
de-aeration. The cooling pump shall be gear driven by the engine.
Auxiliary coolant pumps if required for heat exchangers or separate
circuit after cooling shall be provided. 4.4.5.2 Coolant
temperature shall be internally regulated to disconnect external
cooling systems until operating temperature is achieved. Cooling
system should be designed considering 50 0C ambient and max temp.
Rise of 5 0C is allowed inside the enclosure.
Page 11 of 32
4.4.5.3 Heat rejected to the engine jacket water shall be
discharged to the atmosphere through a radiator. The radiator shall
be sized to cool the engine continuously while operating at full
rated load. Air shall be drawn from the underside of the radiator
and discharged to the atmosphere forced by engine driven fan. The
radiator shall have an expansion tank with sight glass to allow for
proper expansion and filling of the cooling system. 4.4.5.4 Cross
ventilation and free flow of cool, clean and fresh air to be
maintained for satisfactory operation of DG set. Air should flow
from alternator end to engine. Opening in front of radiator should
be 1.5 times radiator core and at back 2.25-3.0 times radiator
core. 4.4.5.5 Installation of piping for hook up the make up water
line from existing header to radiator with necessary valve
arrangements, non return valve, strainer arrangement, pressure
gauge at both side of strainer & flanges/ blinds etc. 4.4.5.6
Ducting in front of radiator may be required to take out hot air
from inside of acoustic enclosure to atmosphere. Extension duct to
be designed and additional ventilation arrangement if required
shall be incorporated by supplier. It shall be finalized during
technical discussion. 4.4.5.7 Provision has to be made for low
coolant level alarm, radiator water high temperature alarm &
trip, cooling water circulation failure and hook up with DG control
panel and AMF panel for annunciation. 4.4.6.0 Technical requirement
of self-starting arrangement of Diesel Engine. 4.4.6.1 The engine
starting system shall include 24-volt DC self-starting motor(s)
(mounted on Diesel engine), starter relay/ magnetic switch and
automatic reset circuit breaker (mounted on AMF panel) to protect
against butt engagement. The engine shall be started by starter
motor engaging with the fly wheel ring gear and disengaging
automatically when the engine starts. 4.4.6.2 Batteries (2 x 12 V)
automotive grade suitable for diesel engine cranking duty
(conforming to IS 7372) shall be lead acid types mounted near the
starting motor. A corrosion resistant or coated steel battery rack
shall be provided with suitable rubber matting for placing
batteries. The system shall be capable of starting a properly
equipped engine within 10 seconds. The starting system shall be
parallel to the engine starting batteries. The battery shall be
capable of providing at least six consecutive starting cycles with
time interval of 5 second. 4.4.6.3 Double run single core TRS
insulated unsheathed circular flexible cable of 70 mm2 (2228 x 0.2)
size conforming to IS: 9857 shall be used for connecting Battery to
starter. 4.4.7.0 Technical specification and requirement of Diesel
Engine. 4.4.7.1 The Diesel Engine shall be stationary, heavy duty,
compression ignition, totally enclosed, water cooled, in line, 4
stroke, direct injection, cold battery starting, turbocharged after
cooled in accordance to BS:5514 and IS:10002 complete with all
accessories. 4.4.7.2 The engine shall be capable of developing
brake horsepower at 1000/1500 RPM to deliver 400 kW /500 kVA
alternator output equipped with all engine-mounted parasitic and
external loads such as radiator fans, engine driven pumps etc.
4.4.7.3 The Engine Alternator set offered shall be continuous duty
type of rating (Prime power) 400 kW /500 kVA. The set may be idle
for a long period except for routine test periodically. When there
is no power supply the set will be required to run continuously at
rated load. The set shall be capable of taking 10% overload for one
hour during a period of 12 hours.
Page 12 of 32
4.4.7.4 Diesel engine shall comply with the requirements of BS
5514 (ISO 3046). The engine shall meet all the performance
requirements of the set under the specified operating conditions.
4.4.7.5 Circulation of cooling water through the engine and
radiator shall be by means of engine driven pump. The water
circuits shall be fitted with an easily accessible drain point. The
cooling fan shall be arranged to drive directly by the engine and
the hot air shall ducted to suitable openings in the generator room
wall. 4.4.7.6 Lubrication of the engine shall be by means of an
engine driven integral pump. The pump shall have on the suction
side a coarse strainer and on the delivery side a duplex `full
flow' fine filter complete with changeover cock to facilitate oil
flow to the engine if filter becomes blocked. The lubricating oil
system capacity shall be sufficient to enable the engine to run
continuously at any load. 4.4.7.7 Lube oil priming pump with motor
shall be provided when the engine is at rest. The control circuit
of the lube oil pump shall be designed to run once for six minutes
after every four hours or any other operating cycle suitable to
engine design and cut off in case of engine running. 4.4.7.8
Lubrication shall be provided by suitable capacity gear pump to
develop positive pressure for lubricating all moving parts. No
moving parts shall be required lubrication by hand either prior to
the starting of engine or while it is in operation. Paper filament
type lube oil filter with lube oil cooler shall be provided for
cooling and filtration of lube oil. A bypass filter shall be
provided to bypass the lube oil in case the lube. oil is not
getting hot. Temperature and pressure gauges / transmitter shall be
fitted to the lubricating system. A dip stick arrangement shall be
provided to check the level of lube oil in sump. 4.4.7.9 The engine
shall be efficiently silenced with suitable noise attenuators
provided at cooling/combustion air inlets and outlets. Bellow type
flexible pipe shall be provided between Engine and M.S. Exhaust
Pipe. 4.4.7.10 Diesel engine assembly should have single piece
Engine block, Deep hardened crankshaft, molybdenum iron cylinder
liners induction hardened, Aluminum alloy piston, Forged steel
connecting rods for piston and rod assembly, intake and exhaust
valves with hardened steel stem and hard faced to resist wear at
high temperature, geared design flywheel, fly wheel hosing with
coupling guard, vibration damper etc. 4.4.7.11 To facilitate smooth
starting of engine in cold weather condition Jacket water heaters
shall be provided to maintain coolant temperature of 32C while the
engine is idle. Heaters of suitable rating (240 volt) with
protection (fuse & contactor) and thermostatic controls shall
be provided. Hoses to and from the heater shall be industrial
quality, which exhibit long life in operational environments.
Automatic logic shall be incorporated to isolate the heaters during
operation. 4.4.7.12 Engines shall start, achieve rated voltage and
frequency, and be capable of accepting load within 10 seconds. All
four DG Sets should be identical in specifications; drooping
characteristics and transient response of shall conform to ISO 8528
and suitable for parallel operation with grid. 4.4.7.13 the fuel
system should comprise of fuel pump with Governor, fuel injectors,
24 volt DC solenoid coil, Replaceable fuel filter. Diesel fuel
rates shall be based on fuel having a low heating value (LHV) of
42,780 kJ/kg when used at 29C and weighing 838.9 g/l. 4.4.7.14 The
governor of the engine shall be electronic type and be capable of
fine governing of speed to Class A2 of BSS 5514/1977, ISO
3046/IV.
Page 13 of 32
4.4.7.15 The governor shall be electronic besides hydraulic with
manually adjustable arrangement with a over speed trip mechanism to
automatically shut-off the engine or the fuel supply if the set
reaches 110% of rated speed. In addition to this, an engine mounted
emergency push button/lever shall be provided from outside of
acoustic enclosure. This shall trip the engine when pressed. This
shall be suitably protected against accidental tripping. 4.4.7.16
The engine shall run steadily and maximum change of speed because
of load variation on suddenly taking off or throwing, speed
variation should be as per clause 2.3.2 of IS:10000 (Part VII).
4.4.7.17 When the engine alternator is delivering 10% and 100% of
the rated power output, the steady load speed band shall not exceed
1% of the rated speed. 4.4.7.18 The recovery time from temporary
distribution to the steady load speed band at the new load shall
not exceed 3 second after taking off or throwing on the rated load.
4.4.7.19 An electronic engine control panel shall be provided on
individual Diesel Generator set visible from outside of acoustic
enclosure. Following parameters/ indication shall be available on
it. a) b) c) d) e) f) Engine speed (rpm) lub. oil pressure (bar)
and temperature ( 0c) Radiator water temperature coolant temp( 0c)
Intake air temp ( 0c) Engine runtime (hour) Controller for
electronic governor
g) Multi channel Temperature scanner with digital display for
exhaust gas temperature of cylinders, engine jacket water
temperature, bearing & winding temperature of alternator.
4.4.7.20 Required sensors for Engine monitoring parameters as
mentioned above shall be provided with analog/digital signal and
additional potential free contacts for Central management system.
4.4.7.21 Calibration certificates for all the measuring and
controlling instruments like fuel injection pump, thermostatic
valves, tacho- generator, electronic governing system, engine
monitoring sensor / devices etc. has to be furnished before supply
of materials. 4.4.7.22 Engine manufacturer shall furnished the
complete data / specification sheet consisting of No. of valves,
Displacement, Compression ratio, Valve arrangement, firing order,
cylinder bore, piston stroke length, % engine loading vs specific
fuel consumption curve showing optimal engine loading with max.
efficiency, max. cylinder temperature at 100% and 110 % of prime
rating, specific fuel & lub. oil consumption per KWh, Engine
performance data at different % load, power de-rating curves etc.
4.4.7.23 Maintenance and overhauling pattern/schedule, operating
life of DG sets, service centre locations and response time for
maintenance shall be furnished for evaluation of post guarantee
maintenance. 4.4.7.24 Fuel consumption rate, lub oil consumption
rate, Efficiency of Diesel engine shall be used for technical
evaluation and depending upon operating hours during its life cost
of energy shall be loaded for comparison of cost. fuel consumption
rate at 75% of the rated load shall be 78 litre per hour.Page 14 of
32
4.4.8.0 Technical requirement and specification of Alternator.
4.4.8.1 The alternator shall be brushless, self excited and
regulated through AVR and designed for continuous rating of 500 KVA
(at 0.8 pf lagging), 415 volts, 3 phase 4 wire, 50 Hz at 1000/1500
rpm conform to IS 4722/1970 at specified site conditions. The set
shall be capable of taking 10% overload for one hour during a
period of 12 hours. 4.4.8.2 The alternator winding shall be star
connected. The power supply terminals (3 phase) and neutral
terminal shall be brought out in separate terminal box. The
terminals shall be mounted in an accessible position on the
alternator with necessary cable gland plates suitable for extension
of the supply to the AMF control panel. 4.4.8.3 The direction of
rotation of alternator, terminal marking of 3 phase with neutral
and terminal marking of field winding shall be in accordance with
IS-4728. The phase sequence (UVW) and direction of rotation shall
be clearly marked on the alternator. 4.4.8.4 The alternator shall
be directly coupled to the diesel engine through flexible coupling.
The degree of protection for the generator and exciter shall be
minimum IP 23. 4.4.8.5 The stator of the alternator shall be
assembly of stator core, foot plates, air baffles and the stator
winding. The stator core consists of low loss electrical sheet
steel. The sheets are insulated to each other by coats of varnish
at both sides. The skewed stator slots have to be used to reduce
noise level. All windings should be double layer fractional pitch
chorded lap type winding to reduce/ eliminate 5th / 7th harmonic,
made of electrolytic grade copper of high purity. 4.4.8.6 The
complete rotor (cylindrical / salient type construction) shall
consist of single shaft, rotor field winding, damper winding, full
bridge diode rectifier unit, brushless exciter winding with fan.
The rotor core shall be shrunk fitted on the shaft. 4.4.8.7 The
shaft shall be designed sufficiently rigid to take care of
transmitting torques, minimum static deflection and natural
frequency away from rated speed. The shaft should have axial
grooves in middle section to accommodate leads from exciter to
field winding of alternator. 4.4.8.8 The inertia of the machine
shall be adequate to meet the transient stability requirements
imposed by the interconnected electrical power system, to limit
speed rise and shall have such a value which will not cause the
machine natural frequency to be in resonance with the expected
frequency of Diesel Generator sets surges. A margin of approx. 25%
shall be provided. 4.4.8.9 The alternator shall be fitted with two
RTDs per phase for monitoring winding temperature. The connecting
leads of the temperature sensors shall be terminated in an
instrument terminals box. Two nos. of space heater of rating 230
volts shall be incorporated inside the enclosures & separately
wired to terminal box. 4.4.8.10 Each alternator shall be provided
with its own exciter. The exciter shall have exciter winding
rotating armature type and its output fed to alternator main field
through full bridge diode rectifier mounted on single shaft. Stator
winding of exciter should have main & regulating field winding
connected to the voltage regulating system. PIV of exciter diodes
must be 800v or 8 times the maximum exciter armature operating
voltage, whichever is higher. 4.4.8.11 The capacity of the
excitation system shall be adequate to supply continuously 1.1
times the excitation current and voltage required by the generator
at 100% rated kVA and 100% rated voltage & for supplying twice
the excitation current required by the machine at 100 % rated kVA
and 110% rated voltage for a duration of one minute without
damage.Page 15 of 32
4.4.8.12 The alternator characteristics shall be suitable for
parallel operation with grid without any quadrature droop
compensations. The AVRs shall be suitable for voltage regulation of
+/- l % or better against all loads and prime mover drop up to 4%
of the nominal speed. 4.4.8.13 The ceiling voltage shall not be
less than 1.4 times the rated excitation voltage for a minimum of
10 sec. Voltage swing (Transient response) when rated load is
suddenly switched on should be maximum 10 % with 0.2 to 0.7 sec
(Recovery time). Automatic voltage regulation 0.5 % to 1.0 % from
no load to full load. 4.4.8.14 The excitation system while
operating at maximum kVA, terminal voltage, power factor &
speed shall be capable of changing from rated field voltage to 90
percent of ceiling voltage within 25 ms for a sustained drop in
generator terminal voltage of 5 percent. 4.4.8.15 Neutral / star
point of alternator shall be solidly earthed via neutral grounding
contactor in case of island mode and selectable incase of parallel
running with grid. 2 nos. of earth points are to be provided of
alternator for body earthing. 4.4.8.16 The alternator shall be
capable to deliver 150 % of FLC and having unbalanced current
carrying capacity of 20 % of FLC and Short circuit current
withstand capacity is 5 times FLC for 5 sec.( S.C. rating of
existing switchgear is 36 MVA). 4.4.8.17 All the performance
requirements such as automatic voltage regulation (AVR), power
system stabilizer (PSS) in accordance with the Authoritys
connectivity regulations and standards, grid standards &
regulations on grid standards shall be complied. 4.4.8.18
Insulation shall be of thermal class H for the stator and the rotor
windings with temperature rises limited to that of thermal Class F.
Vibration severity for the machine shall be within the limits
specified in IS 12075.The rating plate information in accordance
with ISIS 4722/1970. 4.4.8.19 3 phase power terminal box &
terminals should be suitable for terminating 3 nos. of 3 core x 300
sq. mm FRLS insulated Aluminium cable & neutral terminal box
should be suitable for 2 nos. of 150 sq.mm insulated Al. cable and
glanding with double compression cable. Separate terminal boxes
shall be provided for space heater, field winding & RTDs.
4.4.8.20 Generator manufacturers shall furnished the complete data
/ specification sheet consisting of Transient, sub transient ,
synchronous reactance, short circuit ratio, ceiling voltage,
excitation voltage and current at no load and full load, efficiency
at diff % of load, stator and field resistances etc. They will also
furnish unity p.f. and S.C. characteristic curve, No load loss
curve, Power-load angle characteristics, power swing curve,
capability curve ( V-curve) at lagging, leading & unity pf.
4.4.9.0 Technical requirement of AMF control panel of Diesel
Generator Sets 4.4.9.1 Each Diesel Generator set shall be provided
with independent AMF control panel. It shall consist of components
for starting, controlling and monitoring the operation of the
diesel generator set. 4.4.9.2 AMF control panel shall be floor
standing, cubical pattern, fabricated with 2 mm M.S. sheet painted
with anticorrosive red oxide primer and powder coated with
synthetic enamel paint of gray shade. It shall be supported by
structural steel frame with necessary foundation / mounting
arrangement and installed near the DG set. 4.4.9.3 The components
of AMF control panel shall be designed, installed, wired &
integrated as per IS-10118, IS-3072, IS-732 and IS-13947. The
components used in the fabrication of the panel shall be of high
quality/reliability and shall be of reputed make, the spares of
which arePage 16 of 32
readily available in the local market. The design, drawings,
layout & dimension of complete panel shall be got approved from
the Engineer-In-Charge before manufacturing. 4.4.9.4 The AMF panel
shall be dust, moisture & vermin proof with IP 43 enclosure. It
shall have air circuit breaker of 800 amps rating. The breaker
shall be electrically operated, horizontal draw out type, having
three poles operated through a common shaft by operating mechanism.
It shall have Service, Test and Isolate positions within the
cubicle. 4.4.9.5 The circuit breaker shall be capable of rapid and
smooth interruption of currents under all conditions, completely
suppressing severe and persistent short circuit conditions. 4.4.9.6
The symmetrical breaking capacity of the breaker shall be more than
50 KA / 36 MVA, which shall remain constant within the limits of
the rated voltages specified in this specification. For voltages
lower than the rated voltage, the breaking current shall remain
constant. 4.4.9.7 The circuit breaker shall be suitable for rapid
closing and tripping. The breaker opening and closing operations
shall be obtained from compressed spring charging mechanism. The
mechanism for spring charging shall be motor operated with facility
for manual charging when required. Spring operated mechanism shall
be complete with opening spring, closing spring and all necessary
accessories to make the mechanism a complete unit. 4.4.9.8 The
auxiliary voltage of closing circuit, tripping circuit and spring
charging motor shall be 110 volt dc. The closing release shall
operate correctly at all values of voltage between 85% and 110% of
the rated voltage. The shunt trip shall operate correctly under all
conditions of the circuit breaker up to the rated breaking capacity
of the circuit breaker and at all values of supply voltage between
70% and 110% of the rated voltage. 4.4.9.9 The circuit breaker
shall have followings inherent safety features: i) In Test
position, power contacts shall be disconnected however control
contacts shall remain undisturbed and close/trip operations of the
breaker should be possible without energising the power circuits.
ii) Operation of close/trip should not be possible unless it is
fully in Service/Test or Isolate position. Withdrawal or engagement
of breaker should not be possible unless breaker is in open or
tripped condition. iii) In service position it should not be
possible to close unless auxiliary contacts provided for it get
closed. iv) The main isolating power contacts on fixed portion
should have automatically closing shutters by movement of breaker
from service to test/isolate position. They should have door
locking arrangement in closed position. v) Operating mechanism
shall have anti pumping feature for both electrically and
mechanically closing method. vi) Mechanical trip and access to it
shall be provided on the front without opening of the compartment
doors. 4.4.9.10 Mechanical and electrical indications shall be
provided to show open & closed position of the breaker and
charged/discharged condition of the spring located at a place where
they are easily visible to operator, by separate indictor on the
front of panel without opening compartment door. 4.4.9.11 Auto/
manual selector switch for operation of circuit breaker &
C-N-T- switch for electrical close/ trip operation in test/ manual
mode shall be provided. Breaker On/off, Breaker in service, spring
charged, Lock out (86) operated, trip ckt healthy LED
indicationPage 17 of 32
shall be provided on Breaker cubicle. 4.4.9.12 Switch fuse unit
(SFU) with fuses, bimetallic relay, Power contactor, Aux. contactor
etc. required for Lub. oil priming pump (see 4.4.7.7), for
ventilating fans/ blowers (see 4.4.2.5), for illumination inside
acoustic enclosure( see 4.4.2.8) & AMF panel, for jacket water
heater (see 4.4.7.11), for space heater of alternator ( see
4.4.8.9), AMF panel etc. shall be provide in separate cubical for
easy access. 4.4.9.13 A, 4 wire, 415 volt, 50 Hz Class III power
supply shall be available at site for requirement of 4.4.9.12.
Necessary SFU, power contactor, on/off switch, Aux. contactor, LED
indication etc. shall be provided by manufacturer on AMF panel for
incoming supply. 4.4.9.14 3, 415 volt, 50 Hz alternator output
shall be terminated to extended bus-bar connected to incoming of
breaker with necessary current transformers (CTs), potential
transformer( PTs) & excitation transformer etc. for measuring,
protection & AVR. 415 volt R,Y,B, LED indication for incoming
supply from alternator before breaker shall be provided on Breaker
cubicle. 4.4.9.15 Neutral grounding contactor (N.G.C.) shall be
provided for neutral earthing of alternator (see 4.4.8.15). Control
ckt to operate N.G.C shall be built up in PLC. Neutral CT for
Restricted Earth fault & standby earth fault shall be provided
with extended bus-bar for double earthing arrangement separately
from body earthing of AMF panel. Full length copper earth bus shall
be provided at the bottom of the panel. 4.4.9.16 3 terminal at
outgoing of circuit breaker & neutral terminal at incoming of
NGC shall be arranged horizontally with extended bus bar to
terminate 3 nos. of 3 core x 300 sq. mm FRLS PVC insulated
Aluminium cable. 4.4.9.17 The DG set incoming shall be provided
with numerical 3 phase (microprocessor based) multifunctional
generator protection relays with self supervision feature, with LCD
display for parameters, LED indication for fault, RS-485 serial
port for remote communication etc. suitable for electrical
protection of alternator which are mentioned below: a) b) c) d) e)
f) g) h) i) j) Voltage restrained over current protection (50/51V),
two stage Thermal overload protection of m/c.(49) (with alarm &
trip) IDMT O/C + E/F protection (51/ 51N) (selective curves)
Reverse power / Low forward protection (32) Negative phase sequence
protection (46), two stage Loss of excitation (40) Under / over
voltage relay (27/59) two stage Under / over frequency relays (81)
Restricted Earth fault (64 F) & standby earth fault (64 S)
protection Lock out feature (86)
4.4.9.18 Trip circuit supervision relay, control supply failure
relay, PT fuse failure relay, lockout relay, auxiliary relays etc.
required for multiplication of alarm/ trip contact for tripping of
breaker, alarm/ trip annunciation at AMF panel, for remote
indication for synchronization & existing switchgear shall also
be incorporated. 4.4.9.19 One digital Power analyzer/ energy
meter/Tr-vector meter shall be provided for monitoring electrical
parameter such as KWH, KW, KVA, PF, V, I. etc. of alternator. It
shall have RS-485 serial port for remote communication of all
parameters to central monitoringPage 18 of 32
system. 4.4.9.20 24 Volt battery for self starting of Dg sets
shall be connected through Battery charging system with suitable
control & protection system and electronically controlled
regulating system for charging the batteries in float / boost mode
with battery current limit. Battery shall be charged by 415 volt
supply available at same panel. 4.4.9.21 Analog voltmeter &
ammeter shall be provided for monitoring of voltage & current
of battery charger & battery, for voltage & current of
excitation system (field voltage & current), for Alternator O/P
voltage & currents with selector switches for 3. Digital
frequency meter / Analog rpm meter & pf meter shall also be
provided for DG operation. 4.4.9.22 All measuring analog / digital
meter/ tri-vector meter shall be of class-0.5/1 accuracy. 4.4.9.23
Following Switch / push buttons shall be provided at AMF panel for
DG operation: a) Auto/ manual selector switch for auto / manual
starting of DG sets. b) Local/ Remote selector switch for Local
& remote operation of Dg sets. Local means from AMF panel and
remote means from existing Class-III switchgear. c) Start &
stop push button for starting the DG set in local & manual
mode. d) Speed increase/ decrease push button for increasing
frequency /speed in local and manual mode. e) Voltage raise/ lower
push button in local and manual mode. f) On/ off selector switches
for 24 volt DC supply, 110 volt DC supply & 415 volt 3 phase
class-III supply. g) h) Float/Boost mode selector switches for
battery charger. Pushbutton for emergency trip to stop the Diesel
generator Set, excitation etc.
4.4.9.24 PLC based control circuitry shall be designed to start,
control and monitor the operation of Diesel Generator Set. PLC
shall have redundant type CPU with scan time of 10 millisec &
power supply card with LED indicating type I/O cards for monitoring
& controlling the parameters. It shall communicate to Central
Monitoring System of DG system via communicating devices and
cables. 110 volt AC, UPS supply is available at site and shall be
hooked up with necessary cabling at terminals provided by you.
4.4.9.25 Lub oil pressure switch alarm & trip contacts, temp.
switch alarm & trip contacts, HSD fuel level low/high alarm
& trip contacts, trip ckt supervision relay alarm contact,
Electrical fault lock out relay (86) trip contact, 24 volt dc
source available contact, 415 volt class-III supply available
contact, Alternator Bearing & winding temp. alarm / trip
contact from temp. Scanner etc. shall be wired as I/Ps of PLC for
logic buildup for starting & tripping of DG sets, alarm &
trip annunciation on AFM panel. 4.4.9.26 The starting philosophy
shall include following points: i) The present design envisages
three operating & one standby DG sets and same shall be
maintained. All the DG sets are designed to automatically come in
line in case of failure of grid supply (Class-IV) and connect to
three main Bus-Q, Bus-R, Bus-T and standby Bus-S of Class-III
(emergency) switchgear. ii) If Auto/manual selector switch is
selected in manual mode. DG can be started manually only from AMF
panel using start push button, voltage & speed can be
raise/lower using raise/lower push buttons either at AMF panel or
respective Class-III switchgear panel depending upon selection of
Local/ Remote switch.Page 19 of 32
iii) Auto/manual selector switch is normally kept in auto mode.
When the grid voltage falls below the permissible value & after
set time delay; under voltage relay of respective buses (Bus-Q,
Bus-R, Bus-T) trip the respective mains breakers (Class-IV) and
initiate starting signal to respective DGs & standby DG set.
iv) For 500 KVA DG sets: After getting starting signal from Under
voltage relays PLC shall initiate signal to start solenoid of the
starter and starter motor to start the cranking of engine. PLC
shall check starting of engine & the voltage buildup of
alternator (80% of rated voltage). If engine does not get start
& conform by PLC next start shall be initiated. v) A three
attempts automatic starting sequence to be designed with total
lapse time of 25 sec. After every attempts PLC shall checked the
starting of the DG set and required voltage buildup .After lapse of
25 sec engine fail to start shall appear and further starting
action shall be stoped. vi) PLC shall initiate the starting signal
to DG sets only after conforming the following: a) If lub oil
pressure is healthy. b) If Lock out relay (86) is showing healthy.
c) If 24 volt dc supply is available. vii) After satisfactory
starting of DG set & voltage build up to 80% of rated value PLC
shall initiates the closing command to breaker of AMF panel.
4.4.9.27 PLC shall initiate the stop signal to diesel engine sets
in case of following conditions: a) If lub oil pressure becomes
below the trip value. b) Engine fails to start after three
attempts. c) If Engine temp.is high above the trip value. d) Engine
speed above 110%( set value). e) Alternator winding temp. very
high. 4.4.9.28 When class IV (grid supply) power resumes & load
transfer from DG set to grid without break (after synchronization)
& DG supply incoming breaker on existing switchgear gets trip,
PLC shall initiates trip command to trip AMF panel incoming
breaker. After conforming the tripping of AMF breaker, PLC shall
stop DG set after set delay in auto mode. 4.4.9.29 All DG controls,
Alarm/ Trip indications, PLC aux. supply, contactor, stopping
solenoid, etc. shall be designed on 24 volt DC with sufficient
redundancy derived from batteries / charger. 4.4.9.30 Starting
& tripping contacts shall be wired from PLC to start manually
& stop automatically the HSD fuel pump as per HSD level of
Individual HSD tanks of DG sets. 4.4.9.31 If Lock out relay (86)
operates in case of electrical fault PLC shall trips the AMF
breaker. 4.4.9.32 Digital automatic voltage regulator/ controller,
excitation system, excitation transformer, metering &
compounding CT, PT etc. required for voltage regulation &
protection of excitation system etc. shall be provide in separate
cubical at AMF panel. 4.4.9.33 The digital automatic voltage
regulator shall be microprocessor based with fully programmable
(user friendly with LCD display) in either auto/ manual mode or PF
mode. The regulator shall be capable of sensing true RMS in three
phases of alternator output voltage, or operating in single phase
sensing mode. The regulator shall have over currentPage 20 of
32
protection, with under/ over current limiter. 4.4.9.34 The
regulator shall not be damaged or result in unsafe operation when
subjected to open or shorted input due to sensing loss, or sensing
source shorted to ground. 4.4.9.35 A provision is made for field
flashing arrangement for self excitation of the alternator, sensing
of rotating diode by monitoring excitation current, sensing of loss
of excitation, excitation voltage / current sensing for metering,
for sensing of open/ short ckt/ earth fault of excitation ckt etc.,
contact for alarm/ trip required for annunciation shall be
incorporated. 4.4.9.36 A solid state microprocessor based alarm
module shall be mounted on the AMF panel including red (for trip /
fail) and Amber (for status / alarm) flashing LEDs and silencable
alarm hooter with acknowledge, test & reset button to
annunciate alarm/ trip conditions. The hooter shall resound on
subsequent alarms after silencing/acknowledgement, with the
flashing LED displaying a solid light until the condition is
corrected. 4.4.9.37 Annunciation window (4 x 8) shall be provided
for following function:(i) (ii) (iii) (iv) (v) (vi) (vii) (viii)
(ix) (x) (xi) (xii) (xiii) (xiv)
Local mode selected Auto mode selected Manual mode selected
Remote mode selected Battery low Excitation fail Lock out relay 86
operated Generator alarm Generator alarm winding temp.
(xv)
Lub oil pressure low alarm Lub oil pressure low trip Engine
temp. high alarm Engine temp. high trip Fuel oil level low alarm
Engine over speed trip Lub oil priming pump overload NGC on PLC
healthy Radiator temp. high Low coolant level alarm Automatic
control fail(xxvii)
(xvi) (xvii) (xviii) (xix) (xx) (xxi) (xxii) (xxiii) (xxiv)
(xxv) (xxvi)
Generator winding temp. trip bearing temp.
Emergency trip operated ACB trip ckt unhealthy alarm Protection
& metering PT fuse failure alarm Engine fail to start
Governor solenoid
Stop
operated(xxviii) (xxix)
Rotating diode fail.
spare ( 4 windows)
4.4.9.38 A Data integrator/ converter/ mixer shall be provided
on the AMF panel to integrate the data from PLC of AMF panel, from
AVR, from Electronic control panel of DG set, from window
annunciator and from Power analyzer/ energy meter to communicate
the monitoring, alarm & fault data to Central Monitoring System
consists for data logging and generate utility reports. 4.4.9.39
All doors, panels, removable covers shall have neoprene gaskets
around. Pressure release diaphragms on breaker/busbar cubicle and
cable termination compartments shall be provided such that hot
gases discharged during release of pressure dont injure operating
personnel. Page 21 of 32
Cable compartments shall be provided with removable undrilled
plates of 3 mm thick for cable entries from bottom of the panel.
4.4.9.40 All Instruments, relays and control switches requiring
manual intervention shall be flush mounted. 4.4.9.41 Panel doors
shall be fitted with strong, heavy duty hinges and braced so as to
prevent any sagging, bending or distortion. The hinged parts/doors
have latches at two places. The hinges on panel doors should not
deformed due to loads of relays, meters, operating switches, knobs
etc. fitted on the panel doors. 4.4.9.42 All the metallic parts,
enclosures, panel doors shall be earthed to a common earth busbar
running along the entire length of the panel. The size of the earth
busbar shall be selected for carrying the max. fault current. Two
earthing terminals shall be brought out for connection to earthing
grid. 4.4.9.43 Separate cable alleys shall be provided for power
and control terminations. The power connectors up to 16 amps rating
can be DIN rail mounting push type. The connectors above 16 amp.
shall be bolted type with protective shrouds/covers. All the power
terminals shall be provided with suitable rating terminals to
terminate ring type lugs of power cables. The power terminals shall
be properly tagged / labelled and shall be mounted separately from
the control terminals. The control terminal block shall have 20 %
extra terminals. 4.4.9.44 Power cable PVC FRLS (outer sheath) type-
3 nos. from alternator to existing switchgear & control cable
FRLS (outer sheath) PVC insulated from AMF panel to existing
switchgear shall be supply, laid, gland and terminated. 4.5.0
Technical requirement of Central Monitoring System 4.5.1 Central
Monitoring System shall be designed with redundant processor,
workstation loaded with suitable SCADA/HMI software, communication
network with driver software, PC (LCD monitor 17) with printer and
ups to be placed centralized near DG room at average distance of 20
mtrs. 4.5.2 Individual AMF panel of DG sets shall have Data
integrator / mixer (see 4.4.9.38) to communicate on Ethernet/
Modbus / Other suitable communication facility with central
monitoring system through separate Data converter. 4.5.3 Central
Monitoring System shall monitor & store all important parameter
of individual DG sets. Real time and historical data shall be shown
on user friendly graphic display (mimic diagram). CMS shall have
enough memory to store data for 6 month, for periodic data logging
and to generate utility reports on excel sheet as per HWPK
requirements. 4.5.4 CMS most show followings parameters: i) Energy
Parameters- Voltage, Current, frequency, KW, KWh etc. ii) Engine
parameter- Engine speed (rpm), lub. oil pressure and temperature ,
Intake air temp, Engine runtime (hour), temperature of cylinders,
engine jacket water temperature, bearing & winding temperature
of alternator etc. see(4.4.7.19). iii) Important parameter alarm/
trip/ status parameter from PLC/annunciator (see 4.4.9.37) as
defined in of PLC. 4.5.5 CMC shall be supply with following
components: a) PC of reputed make shall be supply with INTEL
PENTIUM (core duo) processor, 2 GB RAM, 250 GB HDD, optical mouse,
17 colour LCD monitor, multimedia keyboard, Serial (RS232) port
& data converter card suitable for 4 channel I/P with 20 %
spare port, DVD combo drive complete with SCADA / driver software
& all required accessories.Page 22 of 32
b) Latest HP Laser B/W A4 size printer complete with print
technology, processor & USB port compatible with
above-mentioned PC.
c) Data converter, Shielded twisted pair serial communication
cable from AMF panel to CMC, hardware etc. required shall be in the
scope of supplier. 4.6.0 Technical requirement of modification of
existing system 4.6.1 Presently All four DG sets (three operating
& one standby) are operating with existing 415 volt (Class-III)
switchgear. They are designed to automatically come in line in case
of failure of grid supply (Class-IV) and connected to their
respective buses (three main Bus-Q, Bus-R, Bus-T and one standby
Bus- S) as per existing logic and same shall be retained. 4.6.2
When class IV (grid supply) power resumes, DG sets are gets
synchronized & load transfer from DG set to grid without break.
We are having common synchronization system for all DGs with plug
in arrangement to synchronize one by one DG with their respective
buses (grid supply). We have planned to use same system for
synchronization by replacing the components of synchronization
panel. 4.6.3 Components Need to be supply for replacing are as
follows: a) Current Transformer of Ratio- 800/5 (20/5P10) - 4nos.
800/5(15/5P10) -4nos. 800/5(20 CL1) 3 nos., 800/0.5- 1 no. (see
sketch / dimension details). b) Synchronizing relay,
synchronoscope, frequency meters, voltmeters etc. c) Manual freq
raise lower button 4 nos., AVR manual remote potentiometer- 4 nos.
4.7.0 List of spares to be obtained for our use after guarantee
period of DG sets: (i) Diesel Engine: a) b) c) d) e) f) g) h) i) j)
All Engine Bearings/Bushes- 1 set Piston Assembly including piston
rings, connecting rods, bolts etc. 2 nos. Piston rings(all types)-
1 set Inlet valve and exhaust valve-1 set Main lub oil pump
assembly- 1 no. Main fuel oil pump assembly-1no. Fuel Injection
pump-1no. Gaskets and O rings-1 set. Turbo Charger assembly-1 no.
Coupling assembly complete-1no.
(ii) Lube Oil Filters: a) b) c) Filter Cartridge/Elements-1 set
Cartridge Guide- 2 no. Set of filter gaskets/O rings-1 set
(iii) Fuel Oil Filters:Page 23 of 32
a) b) c)
Filter Cartridge/Elements-1 set Cartridge Guide- 2 no. Set of
filter gaskets/O rings-1 set
(iv) Aux Lube Oil pump: a) b) c) d) Pump Assembly with motor
& coupling 1 set Set of bearings/Sleeve- 1 set Mechanical
shaft, Seal- 1 set Set of gaskets/O rings- 1 set (v) a) b) c) d) e)
f) g) h) Electrical Alternator:
Set of bearings 1 set Rotating Diode assembly- 1 set Diode Fuse
20 % of total qty AVR cards 1 no. Governor Controller 1no.
Potential transformer one of each type- 1 no. Current Transformer
one of each type- 1 no. Control transformers one of each type- 1 no
(vi) Instrumentation:
a)
10 % of spare instruments or 1 of each type 1 set
Page 24 of 32
5.0 TRAINING:Successful bidder, before erection and
commissioning of Diesel Generator sets at HWPK Site will arrange
for training of engineers- 2 nos. and technician-3 nos. for
operation and maintenance of DG set, PLC and associated equipments
at their premises/factory.
6.0 TECHNICALSPECIFICATIONS: 6.1. Guaranteed Technical
Specifications of Diesel Generator Sets: Engine Specifications/
make Rated Prime rating Overload capability Type of Engine
Aspiration Engine cooling system Governing System Starting Noise
emission control Transient/ Governor characteristics Standard
applicable Alternator specification / make Rating (kW)/ Power
Factor Rated Voltage Rated speed / freq. Excitation / AVR Cooling
Rated Making Capacity Rated symmetrical short circuit rating S.C.
ratio Reputed make 400 kW at 1500 rpm Min. 10 % for 1 hour in every
12 hour operation In line, 4 stroke, compression ignition type.
Turbocharged after cooled Radiator type Electronic besides
hydraulic Self starting Acoustic enclosure As per Class A2
IS-10002, ISO-3046 / 85280 Reputed make as per IS 4722 400 kW / 0.8
p.f. 3 , 415 volt +/- 5 % 1500 rpm / 50 Hz Brushless excitation
/Digital AVR with manual setting Totally enclosed fan cooled (TEFC)
110 k Ap 36 MVA / 50 kA at 415 voilt 0.5
1. a) b) c) d) e) f) g) h) i) j) 2. a) b) c) d) e) f) g) h)
Note- Equipment shall be of similar or higher rating.
Page 25 of 32
7.0 TESTS AND INSPECTION:7.1 The DG sets shall be of proven
design and should have been type tested as per IS 10000 / 10002 and
IS 4722 / 7132 from reputed laboratory of the country within 5
years. Copy of type test results shall be submitted for review.
Type test should have been performed on at least one type of item
of a group of identical items to be supplied. 7.2 Routine/
performance tests of Diesel Generator sets shall be carried out at
manufacturers premises as per IS:10000 / IS:4722 / technical
specifications of our tender in presence of HWPK representatives.
7.3 Provisional list of test to be performed is given below: 7.3.1
Type test: 7.3.1.1 For Diesel Machine (i) Initial performance test
a) Twelve hour rating test of engine b) Fuel consumption test c)
Governing test (ii) Endurance test (iii) Determination of power
(iv) Mechanical efficiency determination (v) Lubricating oil
consumption (vi) Test for smoke level, emission etc. 7.3.1.2 For
Alternator(i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix)
Measurement of winding resistance
Measurement of leakage resistance & potier reactances
Measurement of open-circuit characteristics & parameter
Measurement of short-circuit characteristics & parameter
Efficiency test Temperature rise-test Over speed test Dielectric
test Short-circuit withstand and measurement of reactance &
time const
Page 26 of 32
7.3.2 Routine Test: 7.3.2.1 For Diesel Machine(i) (ii)
Determination of power Fuel consumption test
(iii) Lubricating oil consumption
7.3.2.2 For Alternator(i) (ii)
Measurement of winding resistance of stator, field etc.
Insulation resistance test
(iii) Phase sequence test (iv) Measurement of open-circuit
characteristics & parameter (v)
Measurement of short-circuit characteristics & parameter
7.3 After the stand-alone test of Diesel machine and alternator
is complete the bidders/ supplier shall perform functional test of
PLC, AMF panel etc. and show integration of PLC, Electronic control
panel, communicating devices etc. with central monitoring system.
7.4 Specification sheet & Quality Assurance plan, which shall
include tests during manufacturing, routine tests, type test etc.
has to be submitted for approval before supply of DG sets.
Page 27 of 32
8.0 ENGINEERING, MANUFACTURING AND MAINTENANCE FACILITY:8.1 The
DG sets with all accessories shall be engineered and supply as per
technical specifications and drawings shall be submitted for our
approval. 8.2 The DG sets shall be tested and inspected at the DG
sets manufacture factory. HWPK shall reserves the right to inspect
the manufacturing facility before finalization of purchase
order.
9.0 DRAWING & DATA SHEETS:9.1 The bidder shall furnish the
following drawing and data along with the offer: 9.1.1 Technical
particulars/catalogues for the offered system & detailed
description of the system. The description should be self
explanatory with required sketches/diagrams and prove the technical
suitability of the item offered. 9.1.2 Complete filled in data
sheet for all equipment. 9.1.3 Bill of materials and recommended
list of spares for two years trouble free operation (for our future
use). 9.1.4 Bidder should submit two copies of technical bid (in
duplicate). 9.1.5 Bidder shall submit 4 sets of final and approved
copy of all drawings, datasheet, specification sheet, manual etc.
and one set of soft copy for all documents. 9.2 DATA SHEET
(DEMOGRAPHIC DATA): HWP (K) is situated in village Anushakti
(Rawatbhata) on the bank of Chambal River, 60 Kms. away from Kota
by the side of KotaGandhi Sagar Road. Kota is a big railway
junction of western railway. Site Condition a) Altitude b) Humidity
c) Indoor/outdoor installation d) Climate Owner Less than 1000 M
above MSL 95% non condensing Indoor, Non-AC & may have dust
particles. Tropical with temperature variation 3 C to 47.5
Government of India, Department of Atomic Energy.
9.3 OTHER TECHNICAL DETAILS FOR REFERENCE:(i) (ii) (iii)
Existing Class-III switchgear arrangement single line diagram.
Layout drawing of existing DG sets enclosed. Dimension details of
existing current transformer.Page 28 of 32
10. TECHNICAL DATA TO BE FILLED BY TENDERER:A. 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 Diesel Engine Name of the
Manufacturer Type / Model No. Application code / Standards Rated
Prime rating (kW) Gross Engine power output (hp) Rated speed at
full load (rpm) Overload capability (for 1 hr in every 12 hr) Type
of Engine Aspiration No. of cylinder Bore x stroke length (mm x mm)
Displacement (cc / liter) Firing order Compression ratio Air to
fuel ratio Piston speed Engine cooling system (type) Coolant
capacity (liter) Governing System (class) Load variations Maximum
change of speed as a percentage of rated speed On suddenly taking
off or Transient Change throwing on the rated load Permanent Change
On change of load by any step Transient Change of 20 percent of the
rated load Permanent Change at 100 % load Fuel consumption at 75 %
load rate at 50 % load at 25 % load Heat rejection to ambient Heat
rejection Heat rejection to coolant rate Heat rejection to exhaust
Heat rejection to fuel Heat rejection to after cooler Cranking
motor rating volt/kW Starting system No. of battery Battery voltage
/ amp-hr rating Grade of oil Lub. Oil Consumption rate / 100 hr. of
running system Total system capacity Maximum Oil temperature
Combustion air inlet flow rate (m3/min) Type of silencer
(grade)Page 29 of 32
20
21
22
23
24 25
Exhaust system
Exhaust stack gas temperature (deg C) Exhaust gas flow rate
(m3/min) Exhaust flange size (internal diameter) (mm) Exhaust
system backpressure (maximum) (kPa) Type of enclosure Sound level
at 1 meter (db) Sound attenuation (db) Materials used for sound
attenuation
26 27 28 29 30 31 B. 1. 2 3 4 5 6 7 8 9 10
Noise emission control
11.
12 13 14 15 16 17 18 19 20 21
Dry weight ( kg) Gross weight (kg) Moment of inertia of rotating
equipment with flywheel & fan (kg-m2 ) Acceleration time of
engine from cold to idle speed HSD fuel tank capacity ( in liter)
Alternator Name of the Manufacturer Type / Model No. / frame size
Rating ( kVA / kW / p.f.) Rated Voltage (volt) Stator insulation
class Rated insulation level (KVp) One minute power frequency
withstand voltage Lighting impulse withstand voltage Rated Speed /
Frequency (rpm / Hz) Rated full load current (Amp) Efficiency @ 100
% upf / 0.8 pf @ 75 % @ 50 % Resistance Stator resistance (ohm)
Rotor resistance ( ohm ) Sub transient direct axis Reactances (x)
Sub transient quadrature With time constants () Transient saturated
Synchronous direct axis Synchronous quadratue axis Reactances
Negative sequence (X2) Zero sequence (X0) Short circuit ratio Rated
short circuit current ( kA) Rated fault MVA at 415 volt Type of
cooling Over load capacity 10 % ( hr) 50 % Type of excitation Field
voltage / current at rated load at u.p.f at 0.8 pf lagging Method
of protection against shaft currents Rotor insulation class Exciter
ceiling voltage (volt)Page 30 of 32
Rotor critical speed 22 23 24 25 rpm Temperature rise Weight of
rotor / moment of inertia (kg/ kg-m2 ) Gross weight of Alternator
(kg)
(rpm)
C. 1.
AMF panel Circuit breaker
2. 3. 4. 5. 6. D. 1.
2. 3. 4. 5. 6. 7. 8.
Continuous current rating Short time current rating Peak making
current Power freq. withstand voltage Duty cycle Opening time
Closing time Control voltage for closing / tripping/ spring
charging motor Make & type of Automatic voltage regulator Make
& model of power analyzer/ tri-vector meter Make & rating
of indicating lamp ( rating) Window annunciation type, make &
size ( no. of window/ row) Colour shade of AMF panel General
Overall efficiency of at 25 % DG sets at % of rated at 50 % load at
75 % at 100 % Highest starting load permissible at % at 50 % of
running load at 75% Control cable type Power cable size & type
( PVC / FRLS ) History of manufacturing and earlier installation in
India for getting feed back. Enclose list Delivery period. Time
period for installation & commissioning of one DG sets List of
deviations, if any, from purchasers requirements. Enclose list
Rating
Note: 1. Partially filled data sheets or incomplete technical
information is liable for rejection. 2. Every para of the tender
should be thoroughly studied and requirement mentioned should be
addressed with back up records in the technical part of the tender.
3. Each page of this document and extra sheet submit by the bidder
should be signed along with its official seal. Clarification
regarding site conditions and system for which the Diesel Generator
sets are required can be obtained from;Page 31 of 32
General Manager, Heavy Water Plant (Kota), PO: Anushakti, Via:
Kota, Rajasthan between 0900 hrs. and 1700 hrs. on any working day.
Following are the contact details: Phone No. 01475# 242201, Fax
No.-01475#242203
Page 32 of 32
