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Annexure 4 - Transformer
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T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
INDEX
Sl.No. Item Format No. 1 Transformer general data DEWA/TP/TCD/IDT/ST/2 2 Final checks after energization DEWA/TP/TCD/IDT/ST/3-A 3 Final checks prior to energization DEWA/TP/TCD/IDT/ST/3-B 4 Initial Checks (to be done prior to starting site testing) DEWA/TP/TCD/IDT/ST/4 5 Site processing details DEWA/TP/TCD/IDT/ST/4 6 Visual inspection DEWA/TP/TCD/IDT/ST/5~7 7 Insulation Resistance measurement of Transformer (Winding &core) DEWA/TP/TCD/IDT/ST/8 8 2kV test on core and clamping structure DEWA/TP/TCD/IDT/ST/89 Ratio and Vector group tests DEWA/TP/TCD/IDT/ST/910 Magnetizing current measurement DEWA/TP/TCD/IDT/ST/10 11 Winding Resistance measurement DEWA/TP/TCD/IDT/ST/11 12 Short circuit Impedance measurement DEWA/TP/TCD/IDT/ST/12 13 Measurement of Tan delta and Capacitance of Winding DEWA/TP/TCD/IDT/ST/13 14 Measurement of Tan delta and Capacitance of Bushings DEWA/TP/TCD/IDT/ST/1315 Calibration of Temp. Indicators DEWA/TP/TCD/IDT/ST/1416 Hot spot Gradient check of Winding Temperature indicators DEWA/TP/TCD/IDT/ST/15 17 Ratio check of CTs for winding temperature indicators DEWA/TP/TCD/IDT/ST/15 18 Measurement of transducer out put for Remote Temp. Indicator DEWA/TP/TCD/IDT/ST/16 19 On load Tap changer- Operation checks DEWA/TP/TCD/IDT/ST/17 20 Tap position indication check DEWA/TP/TCD/IDT/ST/1821 Insulation resistance check of devices DEWA/TP/TCD/IDT/ST/1922 Fan Motor check DEWA/TP/TCD/IDT/ST/20 23 Operation check of cooling equipments DEWA/TP/TCD/IDT/ST/21 24 Protective device wiring/operation check DEWA/TP/TCD/IDT/ST/22 25 Cable box inspection DEWA/TP/TCD/IDT/ST/23 26 Checks on AVR DEWA/TP/TCD/IDT/ST/24~2527 Tap changer & cooler alarms / indications check DEWA/TP/TCD/IDT/ST/26 28 Tap Changer Parallel operation checks DEWA/TP/TCD/IDT/ST/27~28 29 Oil leak test DEWA/TP/TCD/IDT/ST/29 30 BDV test on insulating oil DEWA/TP/TCD/IDT/ST/30 31 Test results/properties of Insulating oil before filling in Transformer DEWA/TP/TCD/IDT/ST/31 32 Tests on transformer oil after complete site processing DEWA/TP/TCD/IDT/ST/32 33 DGA test on Transformer oil DEWA/TP/TCD/IDT/ST/33 34 Check on small wiring DEWA/TP/TCD/IDT/ST/34 35 Checks during Fire Deluge operation DEWA/TP/TCD/IDT/ST/34 36 Frequency response analysis DEWA/TP/TCD/IDT/ST/35
Checked By Verified By Verified By
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/1
TP / TCD / QP01-A042012 Revision
1 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
1.0 TRANSFORMER GENERAL DATA HV LV
RATING ONAN / ONAF MVA
NOMINAL VOLTAGE kV
FULL LOAD CURRENT (RATED TAP) A
VECTOR GROUP
SHORT CIRCUIT IMPEDANCE HV/LV Max. Tap ( 1 ) Rated Tap ( ) Min. Tap ( )
TYPE/FORM (given by manufacturer)
YEAR OF MANUFACTURE
ZERO SEQUENCE IMPEDANCE
NO OF TAPS
NO OF FANS
NO OF PUMPS
NO OF RADIATORS
TYPE OF OIL
TOTAL OIL QUANTITY
BREATHER TYPE
OLTC MAKE / MOTOR
OLTC TYPE / MOTOR
TOTAL WEIGHT
CONSERVATOR TYPE
NEUTRAL GROUNDING METHOD
TRAFO TYPE (ICT, IBT, IDT Etc.)
SUB STATION VOLTAGE
TYPE OF ROOF
OLTC COUNTER READING
COMMISSIONING DATE OF TRANSFORMER.
Checked By Verified By Verified By
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/2
TP / TCD / QP01-A042012 Revision
2 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
2.0 FINAL CHECKS (To be carried out after energization) Date:
1. Check for any abnormal sound in the transformer after commissioning
2. Check for any abnormality during OLTC tap operation
3. Check/Ensure no persisting alarms at the AVR & HMI
4. Oil Temperature Indicator reading C
5. HV Winding Temperature Indicator Reading C
6. LV Winding Temperature Indicator Reading C
7. Remote Winding Temperature Indicator Reading C
2.1 FINAL CHECKS (To be carried out during Load Test) Date:
1. Load Test current in the Transformer Amps
2. HV WTI Ammeter Reading Amps
3. LV WTI Ammeter Reading Amps
4. RWTI Ammeter Reading Amps
5. HV WTI circuit current measurement using clamp meter Amps
6. LV WTI circuit current measurement using clamp meter Amps
7. RWTI circuit current measurement using clamp meter Amps
8. Oil Temperature Indicator reading C
9. HV Winding Temperature Indicator Reading C
10. LV Winding Temperature Indicator Reading C
11. Remote Winding Temperature Indicator Reading C
Calibration Details Checked By Witnessed By Witnessed By
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/3-A
TP / TCD / QP01-A042012 Revision
3 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
3.0 FINAL CHECKS (To be carried out prior to energization) Correctness of oil level in all bushings and oil filled chambers.
All air release plugs (including radiators)& Buchholz relays vented
Pressure relief diaphragm intact
All bushing connections & test tap tightness checked
Neutral & Transformer Earth connection satisfactory
Position of all switches in MK & MDU ON position.
All CT connections are through / shorted & CT test windings open
WTI Ammeter circuit link connections are correct *Link Open loop resistance: *Link Closed Loop resistance:
No damage for insulators and clean
No oil leakage
Rating, diagram, Id plates fitted satisfactorily
Ensure that the silica gel is enviro gel type
Breathers satisfactory, oil level correct to the mark and pipe work joint is tight
All cabling and wiring visually satisfactory
All valves are in correct operational position with respect to valve schedule diagram (Ensure valves on both sides of relay and to HV cable box are open).
All valves labeled & locked and blanking covers provided wherever necessary
All protective and cable box covers fitted.
All pre-commissioning tests (including oil tests) completed & results are satisfactory.
Condition of Gland earthing of all cables in MK & MDU shall be satisfactory.
Permanent Identification tags for all control cables on both ends
Availability of marked up drawing copy in MK , MDU & & Record room
All openings (cable entry) in to AVR panel, MK and HV/LV cable box shall be closed.
Availability of power socket for oil filtration unit.
LV cable box connections shall be ensured
Ensure control cable gland and wiring connection tightness at device junction boxes and MK.
Record room verified for availability of records.
Locking of protective B relay & PRD released and locks if any are removed
No persisting alarms at AVR panel/ SCS /SCC (except VT supply absent)
*To be ensured by opening any one link in the CT circuit and entire path shall be measured with link in open and closed condition. Ensure link is closed and tightened after measurements.
Checked By Witnessed By Witnessed By
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/3-B
TP / TCD / QP01-A042012 Revision
4 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
4.0 Initial check (To be done prior to starting the test) No Checks Remarks 1 Availability of safe receipt report from I & QA 2 Ensure safe transit based on shock recorder data 3 Ensure proper site processing 4 Positioning of anti vibration pad 5 Ensure uniform thickness of anti vibration pad 6 Availability of related Specification 7 Availability of approved drawings & installation manual 8 Availability of factory test reports 9 Maintaining site notes 10 Compliance of oil TC to DEWA reference oil (if TC is incomplete, test
shall be done at independent lab)
11 Verification of Minimum / maximum oil level alarm (shall be done during oil filling by simulating actual condition) a) Main conservator (MOLG/ Prismatic MIN/MAX alarm operation) b) Quantity of oil needed to achieve MAX alarm(Ltrs) c) Quantity of oil needed to be drained to achieve MIN alarm(Ltrs) d) Quantity of oil needed to be drained from MIN position to initiate MT Bucholz alarm (Ltrs) * e) OLTC conservator(MOLG/ Prismatic MIN/MAX alarm check)
5.0 Site processing Details ( Site processing shall be done as per the O&M Manual) Equipment details Make: Capacity: Sl No: Last Date conditioning of purifier
5.1. Initial oil treatment (in storage tank) records BDV Water content Tan delta Oil TC from refinery
TC No. 5.2 Vacuum/ Treatment details
Degree of vacuum (min) Duration (hrs) Maintained: Mfrs proposal: Maintained: Mfrs proposal:
5.3 Oil Circulation details of IDT & OLTC Date Time Oil temp (C) Vacuum (in
purifier) IR value of IDT.
Inlet Out let OTI Ambient
Attach separate sheet for balance recordings * Ensure minimum 20 - 30 litres available
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/4
TP / TCD / QP01-A042012 Revision
5 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
6.0 Visual Inspection No Check point Criteria Remarks/Date 6.1 Transformer main body 01 Phase identification label As per approved name plate 02 Rating & Valve Schedule plate Thickness:
Material
03
Accessories & Devices a) Identification b) Type form
(Enclose approved list showing type/form) As per GOA As per GOA/ Approved
04 Fan a) Rating b) Blades c) Fan guards d) Mounting of Fan
Galvanized steel/ Aluminum Shall be available at both sides Shall be independently mounted
with proper Anti vibration arrangement
05 Free space under fan 750mm (min) 06 Valves
a) Main Tank fill, filter & draining b) Sampling valves (top, bottom & cable box) c) Cable box fill, filter & draining d) OLTC fill, filter and & draining e) Hydran valve
Size of valves shall be 50mm 15mm 25mm 25mm 50 mm
07 Pressure relief device a) Make b) Operating pressure
Trafo OLTC Cable box
08 Bushing a) Make b) Rating
HV HVN LV
09 Neutral Earthing a) Touch potential insulation b) Size Earthing cable section
N bar shall be insulated (1 kV) 300mm2 (min)
10 Core and clamp bushing Shall be identified
Verified By Verified By Verified By
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/5
TP / TCD / QP01-A042012 Revision
6 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
No Check point Criteria Remarks/Date 11 Identification of devices MK & Enclosures Shall be identified as per GOA 12 Accessibility of components and devices Easy access shall be available for
buchholz, Bladder rupture, oil level indicators and MK components.
13 Linking and De-linking of LV Bus bar Easy accessibility shall be available inside LV cable box
14 Earth connection between tank and cover One connection shall be located near to core/ clamp earthing
15 LV Bus bar, flexible Neutral terminal and neutral bar
Shall be tin/ silver plated
16 Thickness of cable box and covers 4mm 17 OTI&WTI capillary tubes Shall be dressed properly using
stainless steel ties and shall be identified at both ends.
18 Labels 1) All external parts identification label shall be stainless steel 2) Device label shall be stainless steel
6.2 Marshalling Kiosk/ Motor Drive Unit 01 Contacts, components and other parts which
require periodic maintenance Accessibility shall be there for these contacts
02 Wiring Shall be neatly arranged in trunking 03 Spare terminals Min 20% spare shall be available 04 CT terminals Test barrels shall be available 05 Doors . 1) Shall be lockable type
2) Front window shall be glass & located such that view of indicators are obtained
06 Redundant supply Shall be available 07 Labels Shall be permanent engraved 08 Anti vibration mounting Shall be used for mounting MK 6.3 Remote Tap Changer Panel (AVR Panel) 01 AVR supporting arrangement Shall be as per drawing 02 Contacts, components and other pats which
require periodic maintenance Accessibility shall be there for these contacts
03 Bottom terminal boards Shall be above 200mm from cable crutch of incoming multi core cable
Verified By Verified By Verified By
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/6
TP / TCD / QP01-A042012 Revision
7 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
No Check point Criteria Remarks/Date 04 Wiring Shall be neatly arranged in trunking 05 Spare terminals Min 20% spare shall be available 06 Labels Shall be permanent engraved 6.4 General 01 Oily water tank 1) Shall be available at S/S 02 Spillage oil & Fire water 2) Shall be directed to oily water
tank
03 Cobble stone Size shall be 35 to 50mm 04 Level of water in oily water tank Shall be monitored 05 Roof There shall be no gap at roofing
allowing bird entry
06 IDT room Lighting Availability of Essential/ Non Essential/Emergency lightning shall be confirmed.
07 Record room Record shall be kept in lockable exclusive with glass paneled (Attach list of documents available in room)
08 Maintenance access 1) Accessibility shall be there at the top of transformer 2) Safe Movement inside IDT room shall not be obstructed by pipelines.
09 Jacking facility To facilitate safe jacking of IDT, the jacking pads shall be inside the plinth.
Verified By Verified By Verified by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/7
TP / TCD / QP01-A042012 Revision
8 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
7.0 INSULATION RESISTANCE MEASUREMENT OF TRANSFORMER (WINDING AND CORE & CLAMP)
7.1 INSULATION RESISTANCE - WINDING Measured at 5000 Volts Oil temperature - C
Measured between 15 Seconds (M. Ohms)
60 Seconds (M. Ohms)
600 Seconds
(M. Ohms)
P.I. value (R600/R60)
HV LV and EARTH
LV - HV and EARTH
HV LV
Remarks:- PI value shall be >1.5 7.2 INSULATION RESISTANCE - CORE & CLAMP
Measured at 500 volts Oil Temperature - C Measured between Before 2kv Test (M.ohms)
After 2kv Test (M.ohms) Remarks
Core Earth
Clamps Earth
Core clamps
Note: Confirm that core and clamp are identified and having isolation 8.0 2kV test on Core and clamping structure 1. Applied 2kV, AC, between core & clamps connected together and tank for one minute
Leakage current - mA Result : Withstood / Failed
2. Applied 2kV, AC, between core and core clamps for one minute Leakage current - mA Result : Withstood / Failed
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/8
TP / TCD / QP01-A042012 Revision
9 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
9.0 RATIO AND VECTOR GROUP TESTS 9.1 Ratio Check Tap HV applied volts LV measured Volts Measured
ratio Nominal ratio
Error (%)
Remarks U-N V-N W-N u-v v-w w-u
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Voltage continuity check during tap changing operations - OK / Not OK 9.2 Vector group check
Connected terminals 1U& 2u together, Tap changer being on rated tap. Applied 3-phase voltage on HV terminals.
Vector diagram
Measured voltage:
U-V V-v V-w V-W W-w W-v W-U U-N
Remarks:
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/9
TP / TCD / QP01-A042012 Revision
10 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
10.0 MAGNETIZING CURRENT MEASUREMENT 10.1 HV Winding
Tap No. Applied voltage (volt) Measured exciting current (mA) Remarks U phase V phase W phase
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
10.2 LV Winding
Applied voltage (volt)
Measured exciting current (mA) Remarks U phase V phase W phase
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/10
TP / TCD / QP01-A042012 Revision
11 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
11.0 WINDING RESISTANCE MEASUREMENT 11.1 HV WINDING (Temp C)
Tap No.
Applied current (A)
Measured Resistance (Ohms) Factory value at
75C() Remarks
U N V N W N Average resistance R
@ t C @ 75 C 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Note : Graph plotted ( Tap no on x-axis and R on y-axis) for all the three phases to be attached)
TAP No U V () V - W () W U () Average @ t C ()
11.2 LV WINDING (Temp C) u v / u n
(Ohms) v w / v n
(Ohms) w u / w n
(Ohms) Average (Ohms) Factory value @ 75 C
(Ohms) @ t C @ 75 C
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/11
TP / TCD / QP01-A042012 Revision
12 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
12 SHORT CIRCUIT IMPEDANCE MEASUREMENT
Tap No.
Tap I (A)
Measured voltage on HV (volts)
Measured HV current (Amps)
Impedance (%) at . MVA base
Factory value (%) U V V W W U U V W U V W Average
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Impedance (%) = *Rated current x Measured voltage x 100 (* At corresponding tap) *Rated voltage x Measured current
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/12
TP / TCD / QP01-A042012 Revision
13 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
13.0 MEASUREMENT OF TAN DELTA & CAPACITANCE OF WINDING Ambient temp. Top oil temp.
Sl. No
APPLIED VOLTAGE
(kV)
CAPACITANCE (pF) CURREN
T (mA)
*Dissipation Factor (TAN DELTA) (%) Correction factor k=
Measured combination
Measured Value Factory Value
Difference (%) @
C @ 20C
1
2
3
4
5
6
14.0 MEASUREMENT OF TAN DELTA & CAPACITANCE OF BUSHINGS Make and Type of bushings:
Sl No
Applied voltage
(kV)
Measured on (Sl no. of bushings)
CAPACITANCE (pF) Current
(mA)
*Dissipation Factor (TAN DELTA) (%) Correction factor k=
Measured value
Factory value
Difference % @ C @ 20C
1 HV U
2 HV V
3 HV W
4 HV N
Note:1. Measured values of tan delta and capacitance shall be comparable to factory test report 2.Ensure test tap cap is put back & tight
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/13
TP / TCD / QP01-A042012 Revision
14 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
15.0 CALIBRATION OF TEMPERATURE INDICATORS
15.1 OIL TEMPERATURE INDICATOR
MAKE: TYPE: SERIAL NO.
BATH TEMPERATURE (0C)
INDICATOR READING (0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
COOLER START (0C) COOLER STOP (0C)
Remarks: 15.2 WINDING TEMPERATURE INDICATOR (HV)
MAKE: TYPE: SERIAL NO.
BATH TEMPERATURE (0C)
INDICATIOR READING ( 0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
COOLER START (0C) COOLER STOP (0C)
Remarks: - 15.3 WINDING TEMPERATURE INDICATOR (LV)
MAKE: TYPE: SERIAL NO.
TEST TEMPERATURE (0C)
INDICATIOR READING (0C)
ALARM CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
TRIP CONTACT SETTING (0C) OPERATION OF CONTACTS (0C)
COOLER START (0C) COOLER STOP (0C)
Remarks: - Note: a). Calibration of indicators shall be done simultaneously and the temperature reading between any two indicators
shall be less than 20C. b) Ensure that the red pointer is appropriately set. Calibration Details
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/14
TP / TCD / QP01-A042012 Revision
15 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
16.0 HOT SPOT GRADIENT CHECK OF WINDING TEMPERATURE INDICATORS
Loc
al /
Rem
ote
Indicator Sl No.
Bath Temp ( C)
Current injected at WT terminal
(A)
WTI reading
(C)
Hot spot gradient (C) Remarks Measured =
(WTI reading bath temp )
Required
Loc
al HV- ONAN-
ONAF- 1.2 pu-
Loc
al LV- ONAN-
ONAF- 1.2 pu-
Rem
ote HV- ONAN-
ONAF- 1.2 pu-
Rem
ote LV- ONAN-
ONAF- 1.2 pu-
Note: Hot Spot Winding Gradient of WTI shall be set based on the maximum gradient obtained during heat run test at ONAN or ONAF rating which ever is higher. Test at other ratings are for reference & subject to review. Current shall be applied after attaining steady temperature reading of the indicator. Sufficient time (approximately 40 minutes) shall be given for taking indicator reading, after current injection.
17.0 RATIO CHECK OF CTs FOR WINDING TEMPERATURE INDICATORS
CT location / Identification
No.
Name plate ratio
*Primary applied current
Measured secondary
current
Measured ratio
* Secondary winding resistance
* Measurement done at CT / MK terminals
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/15
TP / TCD / QP01-A042012 Revision
16 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
18.0 MEASUREMENT OF TRANSDUCER OUTPUT FOR REMOTE TEMP. INDICATOR DETAILS OF DEVICES ROTI : RWTI (HV) : RWTI (LV) : Device connected to SCS/SCC
Bath temp. (C)
OTI WTI (HV) WTI (LV) Reading at Remarks OTI
reading Transducer output (mA)
WTI reading
Transducer output (mA)
WTI reading
Transducer output (mA) SCS SCC
40 50 60 70 80 90 100 110 120 130 140 150
Note: Reading at SCS/SCC shall be done at ambient temperature.
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/16
TP / TCD / QP01-A042012 Revision
17 of 36
T P DIVISION TRANSMISSION COMMISSIONING DEPARTMENT SITE TEST REPORT
CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
19.0 ON LOAD TAP CHANGER OPERATION CHECKS Tap changer details Tap Changer Motor Make - Make - Type/Model - Motor Type - Sl. No. - Rating (KW) - MDU Type - Voltage - Year of Mfg. - Rated current -
Sl.No. Description of check Remarks 1 Local operation possible when selector s/w in local position 2 Handle interlock 3 End limit switches in extreme taps 4 Step by step operation 5 Tap position indication in MDU & Divertor switch 6 No of rotations for one step operation 7 Local operation is not possible when selector s/w in Remote position 8 Over travel in operation is within limits 9 Starting current of motor 10 Running current of motor 11 Phase discrepancy in operation (if separate poles for each phases) 12 Time for one tap changing Normal tap 13 Time for one tap changing run through tap (where applicable) 14 Contacts for all alarm/indication circuits 15 Over load tripping of motor (Setting of MPR) 16 IR value of motor and wiring with 500volts Megger 17 Lighting and heater controls (operation of door switch, thermostat etc.) 18 Setting made for voltage monitoring relay (UV/ OV .. ) 19 OLTC counter operation
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/17
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
20.0 TAP POSITION INDICATION CHECK:
Tap Positi
on MDU
Input to Transducer
()
Transducer output for
TPI (mA) at MDU
Transducer (AVR Panel)
Output (mA)
Tap Position at AVR Panel
Tap Position at SCS
Tap Position at SCC
Remarks
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
21.0 INSULATION RESISTANCE CHECK OF DEVICES
Sl. No. Device/Component
Details of devices Test voltage
Ambient Temp.
Terminal numbers in
MK
IR value (M) Serial No Make
1
HV bushing test tap (U) (V) (W)
2 HV-N bushing test tap
3 Buchholz relay(MT)
4 Buchholz relay(CB) 5 Oil level gauge (MT) 6 Oil level gauge (OLTC) 7 Rubber bag failure relay
8 PRD (MT)
9 PRD (OLTC)
10 PRD (CB U) 11 PRD (CB V) 12 PRD (CB W) 13 OLTC surge relay
14 OTI
12 WTI HV 13 WTI LV
14 Heater HV cable box
15 Heater LV cable box
16 Heater Marsh. Kiosk
17 Heater MDU
18 LV cable box supporting insulators
Tested By Witnessed By Witnessed by
Signature
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DEWA/TP/TCD/IDT/ST/19
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
22.0 FAN MOTOR CHECK
Make Rating KW/HP
Type / Model
Rated current
FAN NO.
SERIAL NO.
CHECK for DIRECTION OF ROTATION
STARTING CURRENT (A)
RUNNING CURRENT (Amps)
U V W
OV
ER L
OA
D D
EVIC
E
OVER LOAD SETTING (Amps)
TRIP OPERATION TIME (Sec)
BLOCKED ROTOR CURRENT (A) (Random test 10% only)
ALARM CONTACT (OK/Not OK)
IR VALUE AT 500 V (M ) 48 HR RUNNING TEST (No abnormality during test)
CHECK FAN RUNNING STARTS WHEN ONE PHASE IS DISCONNECTED RUNNING / NOT RUNNING
Calibration Details Tested By Witnessed By Witnessed by
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
23.0 OPERATION CHECK OF COOLING EQUIPMENTS
MANUAL OPERATION
DIRECTION OF FANS / PUMPS
AUTO CONTROL FROM HV W. T. I AS PER DRAWING FAN START (C) FAN STOP. .(C) ACTUAL OPERATION FAN START (C) FAN STOP. .(C)
AUTO CONTROL FROM LV W. T. I AS PER DRAWING FAN START (C) FAN STOP. .(C) ACTUAL OPERATION FAN START (C) FAN STOP. .(C)
AUTO CONTROL FROM O T. I AS PER DRAWING FAN START (C) FAN STOP. .(C) ACTUAL OPERATION FAN START (C) FAN STOP. .(C)
CHECK INTERLOCKING OF COOLING FANS WITH FPS OPERATION
UNDER VOLTAGE RELAY OPERATION AND ALARM CONTACT
MAIN CONTROL MCB TRIP
FAN CONTROL SWITCH TRIP
PUMP / FAN ON INDICATION
PUMP / FAN FAILURE INDICATIONS
CHECK FOR STAGGERED STARTING OF COOLER FANS/PUMPS
WIRING CHECKS (T. B NO, FERRULES, GROUPING OF ALARM CONTACTS ETC. AS PER DRAWINGS)
Tested By Witnessed By Witnessed by
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
24. PROTECTIVE DEVICES WIRING/OPERATION CHECK Sl. No.
Description Initiated from
Terminal No. in MK
Terminal /Ferrule No.in LCC
Remarks/ Results SCS/SCC(To be ensured at the device end)
1 Buchholz Alarm (MT) ------------ 2 Buchholz Alarm(CB) ------------ 3 Oil temp. high ------------ 4 Wind. Temp. high( HV) ------------ 5 Wind. Temp. high (LV) ------------ 6 Rubber bag fail ------------ 7 Oil level high(MT) ------------ 8 Oil level low (MT) ------------ 9 Oil level high (OLTC) ------------ 10 Oil level low (OLTC) ------------ 11 Cooling system faulty 12 Dissolved gas alarm 13 Heating / Lighting
supply failure (MK & CB)
14 Cooling fan running Transformer Trips 1 Buchholz relay (MT) ------------ 2 Buchholz relay (CB) ------------ 3 Surge Relay (OLTC) ------------ 4 Oil temp. high ------------ 5 Wind. Temp. high (HV) ------------ 6 Wind. Temp. high (LV) ------------ 7 PRD (MT) ------------ 8 PRD (OLTC) ------------ 9 PRD (CB U ) ------------ 10 PRD (CB V ) ------------ 11 PRD (CB W ) ------------
Buchholz Relay alarm contact operation check by N2 injection
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/22
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
25.0 CABLE BOX INSPECTION Sl.No Check points Verified by 23.1 HV Cable box prior to HV test of cables U V W
1 Ensure Cleanliness 2 Ensure Earthing of HV and LV terminations 3 Ensure that link is removed &Check test tap cap threads/ tightness 4 Ensure absence of floating parts in cable box 5 Ensure tightness of shield connection 6 Ensure filling of oil 7 Oil test report traceability 8 Ensure the BDV, water content & Tan of filling oil is satisfactory 9 Ensure the BDV, water content of filled oil is satisfactory
10 Ensure body earthing 23.2 HV Cable box after HV test of cables
1 Tightness of shield connection 2 Ensure that link is fitted and connections locked as per cable box
drawing
3 Ensure proper insulation of link as per drawing 4 Ensure cleanliness 5 Ensure that temporary earth link ( provided for HV test) is removed 6 Ensure absence of floating parts 7 Ensure tightness Terminal connections and shield 8 Value of applied torque for the connection of links( as per
manufacturers recommendation ------ Nm Bolt Size ---- mm)
9 Ensure BDV, tan delta & water content of filling oil is satisfactory 10 Ensure the BDV ,water content of filled oil is satisfactory
23.3 LV Cable box (after cable termination) 1 Ensure plating of LV bus bar 2 Ensure terminal connector tightness 3 Measured LV bus bar connection torque (Torque value -- ------Nm
Bolt size ------- mm)
4 Ensure connections are locked after torque checking 5 Ensure that no load is transferred to bushing 6 Ensure min. elect. Clearance as required by drawing. 7 Ensure cable sheath is floating and kept away from earth.
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/23
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
26.1. CHECK ON AUTOMATIC VOLTAGE REGULATOR (AVR) Details of AVR Make : Sl.No. : Band width % : ( volts) Under voltage
blocking (%) :
Over voltage setting (%) : VT sec. voltage : a). SOFTWARE CONFIGURATION DETAILS Firmware version : Background Program Version : b). HARDWARE CONFIGURATION DETAILS i) AVR System Number (If applicable) : ii)Article No/Sl No of AVR components/cards Sl.no. Description of Components / Cards Art. No. / Sl. No. Remarks c). AVAILABILITY OF BACKUP CDs FOR i) Updated background programme (If applicable) : ii) Firmware : d). AVAILABILITY OF MANUAL FOR ALL HARDWARE COMPONENTS / CARDS : e). AVAILABILITY OF SPARE COMMUNICATION CABLES : (For communication b/w PC and AVR system) f). TYPE OF COMMUNICATION PORT : g). ENGRAVED LABELS PROVIDED FOR ALL INDICATIONS AT AVR :
Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/24
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
26.2 Check Points
Sl.No Status description Check point Result Remarks 25.2.1 Operation
1.1
AVR in Auto mode
No manual operation possible from MDU, SCS, SCC and AVR
1.2 Auto operations with the variations in PT sec. Voltage. Tap Raise command when PT sec. Voltage reduced and vice versa
1.3 AVR in manual mode
Auto operations not possible 1.4 Manual operations possible from AVR
Manual operations possible from SCS & SCC 1.5
MDU in local position Operation possible from MDU
1.6 Operation not possible from AVR & SCC/SCS 1.7 MDU & AVR in remote
position Operation not possible from MDU&SCC/ SCS
1.8 Operation possible from AVR 1.9 MDU in remote & AVR in
Supervisory Operations not possible from MDU & AVR
1.10 Operation possible from SCC/ SCS only 1.11 Under voltage blocking No operations possible 1.12 Over voltage setting LED indication 1.13 Selection from SCS/SCC Supervisory/ remote selection of AVR 1.14 Selection from SCS/ SCC Auto / Manual selection of AVR
25.2.2 AVR Display 2.1 Voltage 2.2 Current 2.3 Tap No 2.4 Frequency 2.5 Master/Follower/Independent mode 2.6 Paragramar functions (Breaker status indication)
Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/25
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Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
27. TAP CHANGER & COOLER ALARMS / INDICATIONS CHECK
Sl.No. Alarm description Initiated at AVR DCS SCADA Remarks
27.1. ALARMS
1 TC out of step 2 TC incomplete 3 TC motor supply faulty 4 TC control supply faulty 5 AVR faulty 6 VT supply faulty
27.2. INDICATIONS
1 AVR in Remote 2 AVR in Supervisory 3 AVR in Auto 4 AVR in Manual 5 TC in progress 6 AVR in Independent mode 7 AVR in Master/follower mode 8 TC Extreme tap positions (Raise / Lower) ------- ------- 9 Over Voltage (only at AVR) ----- ------ 10 Under Voltage (only at AVR) ----- ------ 11 AVR healthy Status (only at AVR) ----- ------
Tested By Witnessed By Witnessed by
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Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/26
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
28. TAP CHANGER PARALLEL OPERATION CHECKS 28.1 PARALLEL MANUAL MODE
Sl.No.
MASTER/ FOLLOWER/ INDEPENDENT SWITCH SELECTIONS
OLTC OPERATION RESULT / REMARKS
Operated from
MDU AVR TR 1 TR
2 TR
3 TR 1 TR 2 TR 3 AVR panel SCS SCC
1 R H R/S* M F F OPERATE AS MASTER
OPERATE AS FOLLOWER
OPERATE AS FOLLOWER
2 R H R/S* F M F OPERATE AS FOLLOWER
OPERATE AS MASTER
OPERATE AS FOLLOWER
3 R H R/S* F F M OPERATE AS FOLLOWER
OPERATE AS FOLLOWER
OPERATE AS MASTER
4 R H R/S* M F I OPERATE AS MASTER
OPERATE AS FOLLOWER
OPERATE AS INDEPENDENT
5 R H R/S* M I F OPERATE AS MASTER
OPERATE AS INDEPENDENT
OPERATE AS FOLLOWER
6 R H R/S* I M F OPERATE AS INDEPENDENT
OPERATE AS MASTER
OPERATE AS FOLLOWER
7 R H R/S* M M M OPERATION SHALL BE NOT POSSIBLE OR OPERATE AS MFF MODE
8 R H R/S* F F F OPERATION SHALL BE NOT POSSIBLE OR OPERATE AS INDEPENDED MODE
9 R H R/S* I I I OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
10 R H R/S* M I I OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
11 R H R/S* I M I OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
12 R H R/S* I I M OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
OPERATE AS INDEPENDENT
M Master F Follower I Independent. S*-- Supervisory for SCS & SCC R Remote A Auto H Hand (manual)
Tested By Witnessed By Witnessed by
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Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/27
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
28.2 PARALLEL AUTO MODE Check for Breaker status indications before test *AVR (REMOTE Supervisory)
Sl.No SELECTIONS SWITCH GEAR STATUS Mode of AVR (Automatic change over) OPERATES AS
OPERATION CHECKED FROM REMARKS
MDU AVR HV BREAKERS LV INCOMER / BUS SECTION AVR1 AVR2 AVR3 IDT IDT2 IDT3 AVR DCS SCADA IDT1 IDT2 IDT3 IDT1 BS1 IDT2 BS2 IDT3 1 R H R* C C C C C C C C M F F M F F 2 R H R* C C C C C C O C M F I M F I
3 R H R* C C C C C C C O M F I M F I
4 R H R* C C C C C O C C M I F M I F 5 R H R* C C C O C C C C I M F I M F 6 R H R* C C C C O C C C I M F I M F 7 R H R* O C C C C C C C I M F I M F8 R H R* C O C C C C C C M I F M I F9 R H R* C C O C C C C C M F I M F I
10 R H R* O O C C C C C C I I I I I I 11 R H R* C C C O C O C C I I I I I I
12 R H R* C C C C O O C C I I I I I I
13 R H R* C C C C O C O C I I I I I I14 R H R* C C C C C O O C I I I I I I
C.AUTO OPERATION CHECK USING AVR Repeat the above operations in AVR Auto mode (changing AVR selection as Auto instead of H) and by varying the PT secondary voltages. Result/Remarks Remote H Hand (Manual) M Master F Follower I Independent C Close O Open
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
29.0 OIL LEAK TEST Hourly Reading/ details:
Date Time Ambient Temp. ( C)
Tr. OTI reading
(C) Pressure
at Top (Bar)
Pressure at Transformer Bottom (Bar)
Result /
observation Remarks
----- Before the application of Pressure PRD locking shall be released after completion of pressure test :
Calibration Details Tested By Witnessed By Witnessed by
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
30.0 BDV TEST ON INSULATING OIL
Sl.No Test no BDV of Main tank oil BDV of OLTC oil
1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average
BDV of Cable box oil Before HV test After HV test
U V W U V W 1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average
Sampling done from:
1 Test no: 1 2 Test no: 2 3 Test no: 3 4 Test no: 4 5 Test no: 5 6 Test no: 6
Average
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
31.0 TEST RESULTS / PROPERTIES OF INSULATING OIL BEFORE FILLING
Type of oil : Make: Country of origin: Property Unit Requirement Test Results Remarks
Kinematic viscosity at a) 400C b) -300C
mm2 / S 12 1 800
Flash Point 0C 140 Pour Point 0C - 40 Dissipation factor @ 900C [40 ~ 60Hz] ----------- 0.005 Appearance
------------ Clear free from sediment and
suspended matter
Density at 200C g/ml 0.895 Interfacial tension at 250C mN/m 40 Neutralization Value mg KOH/gm 0.01 Corrosive Sulphur --------- Non corrosive Total Sulphur content % < 0.15
Water Content mg/kg < 30
Antioxidant additives DBPC
%
0.08- 0.4
Oxidation stability a) Total acidity b) Sludge c) Dissipation factor @ 900C d) Total sulphur content
mgKOH/gm
%
%
0.3 0.05 0.050 0.15
Breakdown Voltage (Treated/ delivered) kV 70/ 30 2- Furfural content mg/kg 0.1 PCA content % < 3 PCB content Not detectable DBDS (IEC 62535)
(Copy of Test certificate from oil manufacturer is attached)
Prepared By Verified by Verified by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/31
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
32.0 TEST ON TRANSFORMER OIL AFTER COMPLETE SITE PROCESSING Type of oil: Make: Country of origin:
Sl. No. Property Unit Requirement as per Spec.
Test Result
Remarks
1 Color Number 2 (max) 2 Appearance --------- Clean, free
from sediment and suspended matter
3 Breakdown Voltage OLTC
kV 70
Main tank
4 Water Content OLTC
mg/kg < 10
Main tank 5 Dissipation Factor at 900C. --------- 0.015 6 Resistivity at 900C. Gm 60 7 Neutralization Value mgKOH/gm 0.03 8 Interfacial Tension mN/m 35 9 Oxidation Stability (Test
duration 500h) Total acidity Sludge DDF @ 90C Total sulphur content
mgKOH/gm
% --- %
0.3 0.05 0.05 0.15
10 Antioxidant additives DBPC % 0.08- 0.4 11 Flash Point 0C 140 12 Total PCB content mg/kg
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CONTRACT NO: NAME OF SUB STATION: Main Contractor Name of Bay:
Page no: Consultant: Equipment: Inter Distribution Transformer(IDT) Manufacturer SCADA No: Date
DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
33.0 DGA TEST ON TRANSFORMER OIL Date of Sampling : Oil Temperature :
Sampled by : Sampling Point :
Sample identification :
Tests carried out by :
Test report reference :
Test Results
Sl.No. Dissolved gas Concentration (ppm) Remarks
1 Hydrogen (H2)
2 Methane (CH4)
3 Ethane (C2H6)
4 Ethylene (C2H4)
5 Acetylene (C2H2)
6 Carbon Monoxide (CO)
7 Carbon Dioxide (CO2)
8 Oxygen (O2)
9 Nitrogen (N2)
10 TDCG (ppm / %)
11 CO2 / CO
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
34.0 CHECK ON SMALL WIRING No Check points Requirement Result
1 Alarm/ Trip terminals a) Disconnection b) Identification Alarm Trip c) Termination d) Looping
Facility shall be available Ferrule shall have Alarm or L marking Red ferrule with Trip or T in white shall be provided Stranded wires shall be with crimped terminals. Looping shall be through shorting link
2 CT terminals Shall be with shorting link 3 Plug socket Shall be wired 4 Contact operation check
Door switch of MK Heaters Thermostat (set @.) Hygrostat (set @.)
Performance shall be satisfactory
35.0 CHECK DURING FIRE DELUGE OPERATION
No Check point Requirement 1 Condition of fan Running fan shall trip on deluge operation 2. Entry of water in closed cabinets of
(LV cable box, MK, MDU) & terminal boxes of MOLG, CTs, Fans, PRDs, protective relays & all other device terminal boxes) Ensure that the cabinets are closed and tightened prior to deluge operation)
Shall be watertight.
3 Drainage inside transformer room Drainage system should be satisfactory
Tested By Witnessed By Witnessed by
Signature
Name Organization Consultant DEWA
DEWA/TP/TCD/IDT/ST/34
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DEWA/TP/132 KV/IDT /1.5.1.1.2.04 Rev.0
36.0 FREQUENCY RESPONSE ANALYSIS (FRA) Test shall be done in the following conditions. A. With neutral earthed (through the test equipment) and LV open
1. Applied on HV U phase 2. Applied on HV V phase 3. Applied on HV W phase
B. With neutral earthed (through the test equipment) and LV short circuited 1. Applied on HV U phase 2. Applied on HV V phase 3. Applied on HV W phase
C. With HV open
1. Applied on LV U phase 2. Applied on LV V phase 3. Applied on LV W phase
(Attach the FRA plots to this sheet)
Calibration Details Tested By Witnessed By Witnessed by
Signature
Name
Organization Consultant DEWA DEWA/TP/TCD/IDT/ST/35
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