REPAIR / MAINTENANCE OF 132/11 KV POWER TRANSFORMER AND CONNECTED ACCESSORIES UNDER GE (U) BATHINDA

Amount

Carrying out field test of transformer oil for visual inspection (colour and appearance), break down voltage, water content and acidity before Dehydration & filtration and submission of report all as per IS 1866: 2017 and IEC 60422: 2013 complete all as specified and as directed.

Carrying out tests of transformer oil for Interfacial tension as per ASTM D971 and Dielectric dissipation factor @ 90°C as per IEC 61620, IS 16086, IS 12422 from NABL Accredited Lab complete all as specified and as directed

Dehydration & filtration of transformer oil at site with portable filtration cum dehydration machine to improve the dielectric strength not less than 60 KV with in 1 minute with 2.5 mm Gap complete all as specified and as directed. Note :- (i) Contractor shall ensure no wastage of transformer oil

M & L for onsite overhauling of power transformer (Make: Technical Associates Limited, Vintage: 2008, Oil Capacity in Liters: 10500, Transformer Serial No: TA12.500.GG), 132 kV /11 kV of capacity 12.5 MVA after proper shut down and disconnection of supply as per following complete all as specified and as directed: -

Opening of top cover, connecting pipes, primary and secondary sides bushings, all inspection plates, radiators, PRV, Buchholz relay, draining out transformer oil from transformer in suitable containers (containers to be provided by the contractor), cleaning of tanks to remove any accumulated sludge and also servicing. Testing and calibration of On-load Tap Changer, Buchholz Relay, PRV Alarm / Trip Testing, Oil level indicator, cooling fans etc.

Reassembly of various parts using new set of gaskets, replacement of Silica Gel with all parts/ joints properly installed and tightened.

Refilling of Transformer oil after Filtration, Dehydration of the oil

Reassembly, Reconnection and Commissioning the transformer after conducting following tests of the transformer in presence of Board of officers detailed by Accepting officer: (a) Transformer protection system check i.e. Oil temperature indicator, Winding temperature indicator (b) Insulation Resistance and Polarization index test (c) Measurement of capacitor bushings (d) Measurement of voltage ratio (turns ratio) and Phase displacement (e) Measurement of vector group or polarity of the transformer (f) Measuring of winding resistance (g) Measurement of vibration of the transformer (h) Magnetic Balance Test (i) A measure of Frequency Balance Response (FRA) of the transformer (j) Measurement of floating neutral point (k) Capacitance and Tan delta test for HV bushings & transformer, (l) The measure of short-circuit impedance and magnetizing current of the transformer (m) Operational measurement on OLTC’S (n) Measurement of stability of differential, REF of transformer (o) Measurement of bushing current transformers (BCT’S) (p) Measurement of copper losses

Note: (i) The complete Job shall be executed under the supervision of the original manufacturer and skilled Personnel authorized by the manufacturer. MOU with the original manufacturer along with the details of personnel with their qualification and experience shall be submitted prior to the execution of the item. (ii) All the T&P and testing equipment’s required for undertaking the overhauling shall be arranged by the contractor and the same shall deemed to be included in the quoted rates. (iii) The 132 kV (EHV) bushing shall be measured and paid separately under appropriate item as supply only but labour for fixing the same shall deemed to be included in the quoted rates

Supply only oil-impregnated paper bushing as per IEC 60137:2017 for existing 132 kV /11 kV 12.5 MVA power transformer and having following specification: - (a) Rated Highest Voltage - 145 kV (b) Rated Current - 1250 A (c) Power frequency withstand Voltage (Dry/Wet) – 305 kV /275 kV (d) Lightening impulse withstand Voltage - 650 kV (e) Minimum creep distance - 4495 mm (f) Maximum Angle of Mounting - Max 300 from vertical. (g) Cantilever operating load - 2000 N and Cantilever test load – 4000 N (h) Rated short circuit time rating - 40 kA for 3 Sec Note: The bidder must submit drawings of HV Bushings from OEM for approval of the GE

Supply and fixing in replacement of 132 kV CT live tank including clamp of suitable size for connection on both ends complete all as specified and as directed and as per following specifications: - (a) Type of CT: 145/275/650 (b) Number of cores - 5 Cores for (Protection, metering and Special Protection) (c) Ratio: -75-150/0.577-1-1-1-1A (d) Insulation levels - Power Frequency withstand voltage-275kV (e) Lightening impulse withstand voltage- 650kVp (f) Supply frequency - 50Hz (g) Short time current rating 31.5 kA for 1 sec (h) Dynamic Current Rating - 78.75 kAp (j) Burden - 25VA (k) Total creep-age distance (min) - 3625mm, (l) Current saturation factor, ISF - 15 (m) Accuracy Limiting Factor, ALF- Less than 5 (n) Metering Accuracy Class - 0.2 S (o) The factory testing of CT shall be in the presence of rep of the Accepting Officer to be nominated from MES/PSPCL/PSTCL.

Supply and fixing in replacement of 132 kV outdoor Surge arrestor station class complete all as specified and as directed and as per following specifications: - (a) Nominal System Voltage - 132 KV (b) Rated arrestor voltage - 120KV (c) Highest system voltage -145 KV (d) One-minute power frequency withstand voltage - 275 KV (e) 1.2 / 50 Micro second impulse withstand level - 650 KVp (f) Nominal Discharge current corresponding to 8/20 micro seconds wave shape - 10KA (g) Long duration discharge class-3 (h) Minimum creep-age distance of arrestor housing (mm) - 3625 mm (j) High current impulse withstand value in kA (peak) - 100 kA (k) Minimum prospective symmetrical fault current for pressure relief test - 31.5 kA

Supplying, fixing, testing and calibration in replacement of Numerical differential relay suitable for 132KV 220V DC, 230V AC by disconnecting old analog type relay and coordinate the new relay with incomer complete all as specified and as directed. Make: - Micom P642, AshidaADR233B or equivalent. Note: - The relay should be SCADA compatible.

Supplying, straining and stringing of Aluminium conductor, steel reinforced (ACSR) in replacement of any size (as per site requirement) for overhead line on poles or any other condition including aluminium binding wire of suitable size and suitable conductor/parallel grooves clamps etc and other jointing materials as required at site complete all as specified and as directed. (Notes: (i) The ACSR conductors shall be conforming to IS-398 amended upto date and as specified in SSR Part-I. (ii) The unit rate quoted shall also be deemed to include for supply & fixing of aluminium binding wire, aluminium tapes etc which shall not be included in the weight of conductors. (iii) Weight of the conductors shall be calculated from the nominal weights given in tables in the relevant IS.)

Supply and fixing in replacement of copper strip of size 50 mm X 6mm including PVC sleeve of phase colour coding complete all as specified and as directed.

Laying, connection and testing only in replacement of control cable of any size and core from CT, PT, 132KV breaker, Transformer marshall box to control panel inside breaker room complete all as specified and as directed. Note: - The control cable for fixing to be issued by AGE E/M as schedule B store.

Supplying, fixing and testing in replacement of 11KV epoxy type CT for metering and protection having ratio 900-450/5-5A including control wiring of suitable size complete all as specified and as directed.

Supplying, fixing and testing in replacement of 12 Window Annunciator for 132KV C&R panel suitable for 220V DC supply including connection with control wiring of suitable size complete all as specified and as directed

Supply, installing, Commissioning & testing HT 11 KV, 3 Phase 50 Hz, rupturing capacity 350 MVA indoor type, VCB PANEL totally metal clad with draw able type Vacuum Circuit Breaker including suitable as Incomer, including cable connection with Copper bus bar of suitable rating, horizontal isolation horizontal draw out type VCB of capacity minimum 1250 Amps rated current. The switchgear panel shall be made up of CRCA sheet steel duly powder coated not less than 2.5mm thick for load bearing section and not less than 2 mm thick for non-load bearing and shall be totally dust and vermin proof complete all as specified and as directed and as per following :-

Note: - (i) VCB Panels should be Manufactured, designed & supplied by OEM only. VCB Panels from the System houses are not acceptable (ii) All the main components like VCB/Relays/VI should be of same manufacturer. Vacuum interrupter shall be of OEM Make only. (iii) VCBs should be supplied with Vacuum interrupter with which Type Testing is done (iv) The offered panels shall be tested for IAC level of 25KA for 1 Sec. (v) VCBs should be Type Tested for E2/C2/M2 Class. All type test should be as per as per IEC 62271-100 & IEC62271-200 amended upto date (vi) Cost for two no. of 11kv adapter panel for coupling of bus bar of newly installed VCB with existing VCB bus bar shall deemed to be included in the quoted unit rate

Material and labour for disconnecting of existing VCB by opening of all HT cables, Control cables, earthings, Bus bar from coupler etc. and deposited at MES AGE E/M store complete all as specified and as directed. Note: - (i) Cost for loading/unloading, shifting transport/Tool and plant for taking down and shifting shall deemed to be included in the quoted unit rate, nothing shall be paid extra on this account.

Supply and fill unused mineral insulating oils conforming to IS 335: 2018, Type II Class (Transformer oils), Uninhibited (U), pour point -10⁰C, vacuum filtered in a laboratory, Breakdown voltage of min 70 kV at 2.5 mm gap, Dielectric Dissipation Factor (DDF) of maximum 0.020 after 2h of oxidation complete all as specified and as directed.

AP BUILDERS (BID ID -3401287)

Sant Construction Co. (BID ID -3409483)