PRICE BID T-3010 Supply of 500 / 200 KVA, 11 KV / …

1 1 GUJARAT STATE ELECTRICITY CORPORATION LIMITED ISO 9001:2008, ISO 14001:2004 and OHSAS 18001:2007 CERTIFIED T H E R M AL P O WE R ST AT IO N , U K AI U K A I D A M 3 9 4 6 8 0 , D I S T R I C T : T A P I Phone : 02624 - 233231, 233244 Fax : 02624 - 233300 (O) 233315 (S) e-mail : W e b s i t e : PRICE BID T-3010 Supply of 500 / 200 KVA, 11 KV / 415 V, 3 Phase, Oil filled , transformer suitable for outdoor installation with off circuit tap changer. 2 THERMAL POWER STATION UKAI DAM DIST - TAPI - 394680 SCHEDULE-B ( PRICE Bid) Description : Supply of 500 / 200 KVA, 11 KV / 415 V, 3 Phase, Oil filled transformer suitable for outdoor installation with off circuit tap changer. Reference No.: T-3010 E-Urja RFQ No.: 10905 Sr. No. Description of materials with details of Specifications Quantity Require d UOM Quanti ty Offere d by Tender er Unit Ex-W orks In Rs.

2 Packaging and Forwardin g Charges per Unit in Rs. Excise Duty per unit in Rs. Sales Tax per unit in Rs. Insuranc e Charges per unit in Rs. Freight Charg es per unit in Rs. Unit End Cost PRICE in Rs. Total End Cost PRICE in Rs. 1 11 / KV, 500 KVA, ONAN, TRANSFORMER, HV (3 - PHASE), LV(3 PHASE & NEUTRAL) WITH OFF LOAD TAP CHANGER, OIL filled SUITABLE FOR OUT DOOR APPLICATION 1 Num ber 2 11 / KV, 200 KVA, ONAN, TRANSFORMER, HV (3 - PHASE), LV(3 PHASE & NEUTRAL) WITH OFF LOAD TAP CHANGER, OIL filled SUITABLE FOR OUT DOOR APPLICATION 1 Num ber Detailed technical specifications : As per following Annexure. [1] Annexure-I GTP for 200 KVA / 500 KVA distribution transformers . [2] Annexure-II Technical specifications / Technical terms & conditions. 3 ANNEXURE I GUARANTEED & OTHER PARTICULARS FOR DISTRIBUTION transformers (To be furnished by the Manufacturer in separate sheet as per this format) Sr.

3 No. Description 200 kVA 500 kVA 1. Make & Manufacturer Voltamp, ABB or CGL Voltamp, ABB or CGL 2. Type of Transformer 3 phase, oil filled , Suitable for outdoor installation 3. Voltage Ratio 11000/433V 11000/433V 4. Rating in kVA 200 kVA 500 kVA 5. System voltage (max.) 12 kV 12 kV 6. Rated voltage HV 11 kV 11 kV 7. Rated voltage LV 433 - 250 V 433 - 250 V 8. Line current HV A A 9. Line current LV A A 10. Frequency 50 c/s +/- 5% 50 c/s +/- 5% 11. No. of Phases Three Three 12. Connection HV Delta Delta 13. Type of cooling ONAN ONAN 14. Noise level at rated voltageand frequency 45 db 45 db 15. Min. No. of coil per limb 8 coil per limb 10 coil per limb 16. Connection LV Star(Neutral brought out) Star (Neutral brought out) 17. Vector group Dyn-11 Dyn-11 18.

4 % Impedance at 75 < < 19. Regulation at a) Unity b) at 75 As per IS tolerance As per IS tolerance 20. Tap changing arrangement (off load) & to be provided on HV side for HV variation. + % to in step of % + % to in step of % 21. Flash Test (a) HV 28 kV / 50 HZ for 1min. (b) LV 3 kV/50 Hz for 1 min. To be withstand To be withstand 22. Over potential Test Double Voltage & Double frequency for 1 minute To be withstand To be withstand 23. Efficiency at 75 a) Unity & 4 b) 1) 125% load 2) 100% load 3) 75% load 4) 50% load 5) 25% load As per IS tolerance. As per IS tolerance 24. Core Material used and Grade CRGO Amorphous CRGO Amorphous a) Flux density T T T T 25. Maximum temperature rises above ambient temp. of 50 deg C a) windings by resistance method b) Oil by Thermometer 40 Deg.

5 C 35 Deg. C 40 Deg. C 35 Deg. C 26. Magnetizing (No load) Current at a) Normal Voltage b) Maximum Voltage <3% of FLC <6% of FLC <2% of FLC <5% of FLC <3% of FLC <6% of FLC <2% of FLC <5% of FLC 27. Core loss in watts AMT CRGO AMT CRGO No load losses 124 311 292 730 28. Full load losses in watts at 75 2312(CRGO) 4420(CRGO) 29. Total losses at 100% load at 75 deg. C With in IS tolerance. With in IS tolerance. 30. Total losses at 50% load at 75 deg. C With in IS tolerance. With in IS tolerance. 31. Current density used for a) HV winding. b) LV winding. < (for Copper Cond) < (for Aluminium Cond) < (for Copper Cond) < (for Aluminium Cond) 32. Clearances a) Core & LV b) LV & HV c) HV Phase to Phase d) End insulation clearance to Earth e) Any point of winding to tank 255 mm 255 mm 33.

6 Inter layer insulation provided in design for 1) Top & bottom layer 2) In between all layer 3) Details of end insulation 4)Whether wedges are provided at 50% turns of the HV coil Epoxy dotted Kraft Paper 34. Paint Epoxy-632 5 35. Fittings(accessories) Rating & Diagram Plate, Terminal marking plate, Lifting & jacking lugs, Silica gel breather, Bottom Drain cum Filter valve, Top Filter valve, Thermometer pocket, Conservator with oil filling hole and drain plug, flat Rollers, Explosion Vent with double diaphragm, Oil Temperature Indicator, Winding Temperature Indicator, Buchholz Relay with 2 Nos. shut-off valves, Magnetic Oil Level Gauge, Marshalling Box. 36. Particulars of Bushings HV / LV 1) Type IS-3347/IS-1180 2) Rating as per Note : The following shall be specifically confirmed 1.

7 Whether the offer conforms to the limits of impedance mentioned in the specification 2. Whether the offer conforms to the limits of temperature rise mentioned in the Specification 3. Whether the losses of the transformers offered are within the limits specified 4. Whether the transformer offered is already type tested for the design and test reports enclosed. 5. Bidders are requested to quote the prices of the Transformer for core materials of CRGO & Amorphous separately. 6 ANNEXURE-II Technical terms & conditions TECHNICAL SPECIFICATION FOR OUTDOORS TYPE DISTRIBUTION transformers OF THREE PHASE 11 KV 433 - 250V CLASS UPTO AND INCLUDING 500 KVA WITH CRGO / AMORPHOUS METAL CORE SCOPE: This specification covers engineering, manufacture, assembly, stage testing, inspection and testing before Supply and delivery at site of oil immersed, Naturally cooled 3 phase 11 kV/433 - 250 V Distribution transformers for outdoor use.

8 It is not the intent to specify completely herein all the details of the design and construction of equipment. However the equipment shall confirm in all respects to high standards of engineering, design and workmanship and shall be capable of performing in continuous operation up to the Bidder s guarantee, in a manner acceptable to the purchaser, who will interpret the meanings of drawings and specification and shall have the power to reject any work or material which, in his judgment is not in accordance therewith. The offered equipment shall be complete with all components necessary for their effective and trouble free operation. Such, components shall be deemed to be within the scope of Bidder s Supply irrespective of whether those are specifically brought out in this specification and / or the commercial order or not.

9 STANDARD RATINGS: The Standard Ratings shall be 200 / 500 KVA. STANDARDS: The materials shall conform in all respects to the relevant Indian / International Standard Specification, with latest amendments thereof; some of them are listed below: Indian Standard Title International & Internationally recognized standard ISS -2026/1977 Specification for Power Transformer IEC 76 IS 12444 Specification for Copper wire rod ASTM B-49 ISS -3347/1967 Specification for porcelain Transformer bushing DIN 42531,23,3 ISS-335/1983 Specification for Transformer Oil BS 148, D-1473, D-1533- 1934 IEC Pub 296-1969 ISS - 5484 Specification for Al Wire rods ASTM B - 233 ISS - 9335 Specification for Insulating Kraft Paper IEC 554 ISS - 1576 Specification for Insulating Press Board IEC 641 ISS- 6600/1972 Guide for loading of oil Immersed transformers IEC 76 ISS-649 Testing of Steel Sheets & Strips For Magnetic circuits 7 ISS-6162(Part-I&II)

10 Paper covered Aluminum Conductor ISS- 3401 Silica gel ISS-1866 Code of practice for maintenance & supervision of Mineral insulating oil in equipment. Material conforming to other internationally accepted standards, which ensure equal or higher quality than the standards mentioned above, would also be acceptable. In case the Bidders who wish to offer material conforming to the other standards, salient points of difference between the standards adopted and the specific standards shall be clearly brought out in relevant schedule. Four copies of such standards with authentic English translations shall be furnished along with the offer. SYSTEM DETAILS: The transformers shall be suitable for outdoor installation with 3 phase 50 Hz, 11 KV system in which the neutral is effectively earthed and they should be suitable for service under fluctuations in Supply voltage up to plus 10% to minus 15%.