TECHNICAL SPECIFICATION FOR 11 & 22 KV DISTRIBUTION TRANSFORMERS OF RATINGS 63 KVA & 100 KVA CAPACITY (SPECIFICATION NO.WORKS T&D : 01-N/2001)

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1 TECHNICAL SPECIFICATION FOR 11 & 22 KV DISTRIBUTION TRANSFORMERS OF RATINGS 63 KVA & 100 KVA CAPACITY (SPECIFICATION NO.WORKS T&D : 01-N/2001) MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 1 OF 21

2 TECHNICAL SPECIFICATION FOR 11 & 22 KV DISTRIBUTION TRASNFORMERS OF RATINGS 63 KVA & 100 KVA CAPACITY (SPECIFICATION NO.WORKS T&D : 01-N/2001) 1. SCOPE : This specification covers oil immersed naturally cooled, three phase, 50 HZ, double wound outdoor type C.R.G.O. Core distribution transformers of capacities 63 and 100 KVA for use on system with nominal voltages of 11 kv and 22kV. 2. APPLICABLE STANDARDS : Unless otherwise modified in this specification, the distribution transformers shall comply with the latest versions of IS 1180 (Part-I), (Part-II) and IS SYSTEM DETAILS : The transformers shall be suitable for outdoor installation with 3 phase 50 Hz, 11 kv and 22 kv system in which the neutral is effectively earthed and they should be suitable for service under fluctuations in supply voltage upto 12% permissible under Indian Electricity Act and Rules there under. 4. WEATHER CONDITIONS : The material used in the construction of the distribution transformers shall be suitable for use under the following weather conditions: Temperature : 30 degree C to 50 degree C. Relative humidity : 100% Altitude : 0 to 1000 mtrs. 5. RATINGS : Primary voltage : 11 kv / 22kV. Secondary voltage : KV. The windings of the transformers shall be connected Delta on the primary side and Y (Star) on the Secondary Side. The neutral of the LT winding shall be brought out to a separate insulated terminal. The vector group shall be Dyn TEMPERATURE RISE : Temperature rise for top oil over an ambient temp. Of 40 dec. should be 45deg.C. Maximum (measured by thermometer as per IS-2026). Temperature rises for winding over an ambient temp. of 40 deg.c. should be 50 deg.c. maximum (measured by resistance in accordance with IS 2026). 7. NO LOAD VOLTAGE RATING : The no load voltage ratios shall be as follows : a) 11000/433 V for all capacities. b) 22000/433 V for all capacities. 8. TAPS : No tapping shall be provided on the higher voltage winding for variation of HV voltages. 9. DESIGN & CONSTRUCTION : Core - MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 2 OF 21

3 a) Material - C.R.G.O sheet. b) The core shall be of high grade cold rolled grain oriented annealed steel lamination having low loss and good grain properties, coated with hot oil proof insulation, bolted together to the frames firmly to prevent vibration or noise. All core clamping bolts shall be effectively insulated. The complete design of core must ensure permanency of the core losses with continuous working of the transformers. The lamination used shall be clearly stated in the offer along with graph. c) The transformer core shall not be saturated for any value of v/f ratio to the extent of 112.5% of the rated value of v/f ratio (i.e /50 or 22000/50 ) due to combined effect of voltage and frequency ) up to 12.5% without injurious heating at full load conditions and will not get saturated. The bidder shall furnish necessary design data in support of this situation. d) Flux density: Flux density at rated voltage and frequency shall not exceed teals. No load current at rated voltage and at 112.5% of rated voltage shall not exceed the values given in Table given below : Sr. KVA Rating Percentage of rated full load current No At 100 % Rated voltage At % Rated voltage The test for magnetic balance by connecting the LV phase by phase to rated phase voltage and measurement of an-bn-on voltage will be carried out. e) Number of steps of core shall be minimum 5. f) Diameter of core should not be less than 22kV class 11kv class i) For 63 KVA 115mm 100mm. ii) For 100 KVA 130mm 115mm. g) Effective core area of core should not be less than - 22kV class 11kv class i) For 63 KVA 94cm2 70cm2. ii) For 100 KVA 121cm2 92cm2. h) Core clamping : MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 3 OF 21

4 1. The core clamping shall be done by MS flat having sufficient thickness for effective clamping. 2. The top yoke channels if cut or holes are made for taking LV connections, suitable reinforcement to channel shall be made by adequate size of M.S flat with thickness not less than 6mm. 3. MS channel shall be painted with oil and corrosion resistant paint before use. 4. 4nos of 12 mm dia. MS rod shall be used as tie rods and will be efficiently insulated 5. Core base and bottom yoke shall be supported with 75mm X 40 mm. MS channel with proper bolting together. In no case flat or cut channels shall be accepted. 10. WINDINGS : a) Materials: Double paper covered aluminum conductor shall be used for 11kV class transformer. For 22 kv 63KVA & 100KVA DPC copper conductor shall be used. b) Current density for HV and LV should not be more than 2.8 A/sq.mm. (However, + 5 % tolerance for LV winding is permissible ) for copper and 1.6 A/sqmm for aluminum conductor. c) H.V. cross section shall not be less than Brno. Ratings LV Cross Section. 22kV class 11kv class i) For 63 KVA 0.39mm2 1.39mm2. ii) For 100 KVA 0.54mm2 2.27mm2. d) L.V. Cross Section should not be less than Sr.No. Ratings for 11 kv and 22 kv (5% tolerance is permissible) KVA 52.5 mm mm2 (5% tolerance is permissible) KVA 86.00mm mm2 (5% tolerance is permissible) Note : LV winding shall be in even layers so that the neutral formation will be at top. 11. LOSS & IMPEDANCES : A) For transformer without taps, losses and impedances at rated voltage for various ratings of transformers of 11 kv/22 kv class shall not exceed the value given below: TABLE Voltage KVA No load Full load losses % impedance Ratio Rating losses in in watts. (subject to tolerance watts.(max.) (Max.) as per IS-2026) / % MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 4 OF 21

5 % 22000/ % % Note : for transformers with taps the permissible values for no load loss shall be 5% higher than those for transformers without taps. The values for load losses given here shall be applicable to such transformer at principle taps. B) The values guaranteed in G.T.P. for flux density, no load current at rated voltage, no load current at 112.5% of rated voltage and no load loss at rated voltage shall be individually met. Insulation material & clearances: a) Materials - Electrical grade insulating craft paper of Triveni/Ballarpur/Cauvery or equivalent make subject to approval of the employer. Press MSEDCL of Senapaty, Whitelay or Raman make or equivalent subject to the approval of the employer. Perma wood or Haldi wood blocks shall be used for top and bottom yoke insulation. b) Radial clearance of LV coil to core (bare conductor) shall not be less than - 1) For 63 KVA T/F mm. minimum. 2) For 100 KVA T/F mm. minimum. c) Radial clearance between HV & LV shall not be less than 11 mm. For 11 kv For 22 kv 1) 63 KVA } 11 mm 14 mm 2) 100 KVA} d) Phase to phase clearance between HV conductors shall not be less than For 11 kv For 22 kv 10 mm 15 mm With a minimum of 2 x 1 mm press MSEDCL to cover the rods. e) The minimum electrical clearance between the winding and body of the tank (between inside surface of the tank and outside edge of the windings) should be 30 mm. & 40 mm in case of 11 kv & 22 kv Class transformers respectively. f) Minimum end insulation to earth shall be 1) 11 kv - 25 mm 2) 22 kv - 40 mm g) No. of coils HV/ phase (minimum) 11 kv 22 kv 1) For 63 Kva 4 6nar 2) For 100 KVA 4 6 h) Thickness of locking spacers between HV coils - 10mm. minimum. i) No. of axial wedges between LV and MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 5 OF 21

6 HV winding equispaced around LV - 6 for 63 KVA 8 for 100 KVA. j) Minimum external clearances of bushing terminals HV - Ph to Ph mm. Ph to E mm. LV - Ph to Ph - 75 mm. Ph to E - 40 mm. 12. TANK : The transformer tank shall be robust construction and shall be built of electrically welded MS plates. All joints of tank and fittings should be oil tight and no bulging shall occur during service. The tank design shall be such that the core and windings can be lifted freely. The tank plates shall be of such strength that the complete transformer when filled with oil may be lifted bodily by means of the lifting lugs provided. Tank inside shall be painted by varnish. Top cover plate shall be slightly sloping approximately 5 to 10 dec. towards HV bushing and ends of cover plate should be bent to 45 to 90 deg. downwards so ass to avoid entry of water through the cover plate gasket. The width of bend plate shall be 25 mm min. The top cover shall have no cut a point of lifting lug. Shape of the tank shall be rectangular only. No other shape will be accepted. The tank shall be fabricated by welding at corners. No horizontal or vertical joints in tank side walls and its bottom or top cover will be allowed. In addition the cover of the main tank shall be provided with an air release plug. a) i. Side wall thickness : 3.15 mm. (min.) ii. Top and bottom plate thickness : 5.00 mm. (min.) b) Reinforced by welded angle on all the outside walls on the edge of tank to form two equal compartments. The permanent deflection is not more than 5mm. upto 750 mm. length and 6mm upto 1250 mm length when transformer tank without oil is subject to a vacuum of 760 mm of mercury. Pressure test shall be performed carefully at the time of 1 st stage inspection only to confirm the adequacy of reinforcement angle and gauge of the tank. c) Lifting lugs : 2 nos. welded heavy duty lifting lugs of MS plate of 8mm thick suitably reinforced by vertical supporting flat welded edgewise below the lug on the side wall, upto reinforcing angle. They shall be so extended that cutting of bend plate is not required. d) Pulling lugs: 4 nos. of welded heavy duty pulling lugs of MS plate of 8mm thick shall be provided to pull the transformer horizontally. e) Lifting lug for cover : 2 nos. of lugs of MS plate of adequate size shall be provided to lift the tank cover. f) Top cover gasket and bolt : g) The gasket provided in between top cover plate and tank shall be of 5mm thick neoprene rubberised oil resistant corksheets conforming to type B or C as per IS 4253, Part-II. ii) GI nut bolts shall be of size 3/8" x 1.5" with one plain washer suitably spaced to press the cover. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 6 OF 21

7 iii) The height of the tank shall be such that the minimum clear height upto the top cover plate of 120mm is achieved from top yoke. 13. HEAT DISSIPATION : a) Heat dissipation by tank walls excluding top and bottom should be 500 W/sq.m. b) Heat dissipation by fin type radiator 1.25mm thick will be worked out on the basis of manufacturers data sheet. The ten direr should submit the calculation sheet. c) For 63 and 100 KVA T/F, 2 nos. radiators shall be provided only on LV side and shall be of fin type. They should be fixed at right angle to the sides and not diagonally. The size of the radiator shall be such that it covers atleast 50% of bottom yoke, full core and complete top yoke. 14. TOTAL MINIMUM OIL VOLUME : Sr.No. KVA rating Oil in ltrs.(inclusive of oil absorbed Permissible oil In core coil assembly) absorption (ltrs.) KVA KVA Note : If the absorption of oil in core and winding assembly is more than permissible value, first filling oil of valium should be increased accordingly. Detailed calculation of absorption should be submitted. 15. CONSERVATOR : a) The total volume of conservator shall be such as to contain 10% of total quantity of oil. Normally 3% quantity of the total oil will be contained in the conservator. Dimention of the conservator shall be indicated on the General Arrangement Drawing. b) Oil level indicator shall be provided on the side which will be with fully covered detachable flange with single gasket and tightened with MS nut-bolt. c) The inside diameter of the pipe connecting the conservator to the main tank shall be within 20 to 50 mm and it should be project into the conservator in such way that its end is approximately 20mm above the totem of the conservator so as to create a sump for collection of impurities. The min. oil level (corresponding to (-) 5 deg.) should be above the sump level. The pipe from conservator tank connecting to main tank shall be of 30 mm(min.) dia and shall have a slopping flap so that the oil falling from the pipe shall not fall directly on the active job and shall fall on the side walls only. The conservator shall be provided with the drain plug and a filling hole (30mm dia) with cover. 16. BREATHER : Breather joints will be screwed type. It shall have die-cast aluminum body or of Poly propylene materials and inside container for silicagel shall be of tin sheet, in case of MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 7 OF 21

8 aluminum die cast breather. Makes of the breakers shall be subject to employer's approval. Volume of breathers shall be suitable for 250 gm. of silicagel. The make and design of breather shall be subject to approval of employer. 17. TERMINALS: Brass rods 12 mm dia for HT and LT with necessary nuts, check-nuts and plain thick tinned washers. 18. BUSHINGS: i. For 11 kv class, 12 kv bushing will be used and for 433 volts 1.0 kv terminal bushing will be used. Bushings of the same voltage class shall be interchangeable bushings with plainshed as per IS 3347 shall be mounted on the side of the tank and not on the top cover. Only one sheet metal pocket shall be provided for mounting of HV bushings and the same shall not be fixed on pipes. Sheet metal pocket shall be designed in such a way that all H.T. Bushings shall remain parallel and at equi-distance throughout. Bushings have type tested as per IS 3347 shall only be acceptable. ii. Internal connections: a) H.V. winding : 1. In case of H.V. winding all jumpers from winding to bushing shall have cross section larger than winding conductor. 2. In case of Al. Winding Delta joints shall be with Brazing only. 3. Lead from delta joint shall be connected to bushing rod by brazing only. b) L.V. winding : L.T. Star point shall be formed of Al./Cu. Flat of sufficient length. Lead from winding shall be connected to the flat by brazing. Any other arrangement shall be subject to the approval of Chief Engineer(Dist.). Firm connections of L.T. winding to bushing shall be made of adequate size of `L' shaped flat. Connection of L.T. Coil lead to `L' shape flat shall be by brazing. Alternatively `L' shape lug of adequate capacity effectively crimped shall be acceptable. `L' shape flat/lug shall be clamped to L.V. Bushing metal part by using nut, locknut and washers. For Aluminum windings, L&T Alkapee aluminum brazing rods with suitable flux will be used. 19. TANK BASE CHANNEL : It should be of two numbers of 75 x 40 mm channel for 63 KVA and 100 KVA T/Fs. 20. TERMINAL MARKING PLATES AND RATING PLATES : 1.1 Terminals shall be provided with terminal marking plates showing the relative physical position of the terminal and their marking as per drawing marked on plates. The transformer shall be provided with non-detachable rating plate of aluminum anodised MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 8 OF 21

9 material fitted in a visible position. The entries of the rating plate shall be in indelibly marked (i.e. by etching, engraving or stamping). 1.2 Marking as `M.S.E.D.C.L' and `Sr.No.' of transformer will be engraved in addition to above on transformer main tank below L.T. bushings. 1.3 The name of the company, order No., capacity, month and year of manufacturing shall be engraved on the tank of transformer just below the name plate clearly visible. The engraving can be done on separate plate which shall be firmly welded to main tank and shall form integral part of the tank. 21. FITTINGS : The fittings on the transformers shall be as under : 1. Rating and diagram plate - 1 no. 2. Earthing terminals with lugs. - 2 nos. 3. Lifting lugs. - 2 nos. 4. Oil filling hole with cap(on conservator) 1 no. 5. Drain valve - 20mm for all T/Fs - 1 no. - it shall be covered With metallic cover by spot welding). 6. Conservator with drain plug. - 1 no. 7. Thermometer pocket - 1 no. 8. Explosion vent - 1 no. (only for 22 kv T/F) 9. Silicagel breather - 1 no. 10. Platform mounting channel - 2 nos. 11. Oil level guage indicating positions of oil marked as below : Minimum - (-) 5 deg.c. 30 deg.c. Maximum - 98 deg.c. 12. HT & LT bushing - 3 nos. of HT bushing and 4 nos. of LT bushing shall be provided. 13. Radiator - As per Cl Arcing horns for HT bushings. 15. Pulling lugs - 5 nos. 16. Metallic cover spot welded to tank for drain valve shall be provided. 22. TRANSFORMER OIL : The transformer shall be supplied complete with first filling of oil and the same shall comply with IS 335/1983 with latest version thereof and aging characteristics specified. Type test certificates of oil being used shall be produced at the time of stage inspection. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 9 OF 21

10 New oil - Ageing characteristics after accelerated ageing (open breaker method with copper catylist) a) Specific resistance (resistivity) i) at 27 dec.c x 10 ohm - cm (min) ii) at 90 dec.c x 10 ohm - cm(min) b) Dielectric dissipation factor (max.) (tan delta) at 90 deg.c. c) Total acidity, mg.(koh)/gms (max) d) Total sludge value (%) by weight (max) (The method of testing these ageing characteristics is given in Appendix-C of IS 335/1983). Characteristics of oil in the transformer : The important characteristics of the transformer oil after it is filled in the transformer (within 3 months of filling) shall be as follows : Sr.No. Characteristics Specification Electric strength (Breakdown voltage) 30 kv (Min.) 2. Dielectric dissipation factor 0.01 (Max.) (tan delta) at 90 deg.c. 3. Specific resistance (resistivity) 10 x 10 at 27 deg.c. (Ohm-cm) 4. Flash point, P.M. (closed) 140 dec.c (Min.) 5. Interfacial tension at 27 deg.c N/M (Min.) 6. Neutralization value (total acidity) 0.05 m/koh/gm (Max.) 7. Water content PPM. 33 (Max.) 23. A) ROUTINE TESTS : All transformers manufactured and to be supplied shall be subjected to the following routine tests (at the cost of the supplier). 1. Measurement of winding resistance. 2. Ratio, polarity and phase relationship. 3. Impedance voltage. 4. Load losses. 5. No load losses and no load current. 6. Insulation resistance. 7. Induced over voltage withstand test. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 10 OF 21

11 8. Separate source voltage withstand test. B) Type tests : In addition to routine tests as above, all type tests as under shall be carried out at laboratories accredited by National Accreditation MSEDCL for Testing and Calibration Laboratories (NABL) in accordance with IS 2026/1977 as amended from time to time. i. Impulse voltage withstand test as per Clause No.13 of IS 2026 (Part-III)/81. Impulse voltage withstand test shall be for 75 KVp & 125 KVp for 11 kv and 22 kv Class transformers respectively. ii. Temperature rise test. iii. Air pressure test. iv. Dynamic Short circuit test. v. Unbalanced current test - unbalanced current should not be more than 2% of full load current. C. Test certificates : Type Test Reports (alongwith certified drawings/ oscillograms etc. of the offered equipment) from laboratories which are accredited by the National Accreditation MSEDCL for Testing and Calibration Laboratories (NABL) shall be furnished to prove that the equipments offered meet the requirements of the specification. The tenderer should also furnish a copy of Accreditation Certificate from NABL, valid ass on date of type test, and duly attested by testing laboratory where the type tests are carried out. If the type tests are carried out prior to 5 years from the date of opening of tender, the tenderer will have to carry out the test free of cost before despatch of first lot. The employer reserves the right to demand repetition of some or all the type tests in presence of employer s representative. For this purpose, the tenderer shall quote unit rates for carrying out each type test. However, such unit rates will not be considered for evaluation of the offer. 24. DRAWINGS : One copy of the dimensional drawing and internal construction drawing of each Transformer shall be submitted. These drawings shall be of A3 (420 x 297mm) size only. 24A The offers without following documents shall be stand rejected. 1) Type test report and accreditation certificate required as per Clause No.24C. 2) All the relevant information in Schedule `A' i.e. Guaranteed Technical Particular (GTP). 3) Drawings required as per Clause TOLERANCES : Unless otherwise specified herein, the test value of the transformers supplied should be within the tolerance permitted in the IS:2026 (Part-I) table on the guaranteed values Finishing : MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 11 OF 21

12 The exterior of the transformer and other..fillings shall be thoroughly scrapped and given a primary coal and the two finished coats of.oil and weather resisting enamel paint. The colour of the finishing coats shall be dark green conforming to IS5 of 1961 (colours for ready mixed paints). 25A The month and year of supply shall be painted in red bold marathi lettering at two places, one on conservator and other at sum conspicuous place on the transformer which shall be clearly visible from the ground. The height of letter shall be as per applicable drawing. 26. GUARANTEED AND OTHER PARTICULARS FOR TRANSFORMERS : To be filled in and submitted by the tenderer. 27. DOCUMENTARY EVIDENCE : The tenderer will have to produce documentary evidence for the purchase of Amorphous Metal Sheet, oil and aluminum wire. 28. TESTING FACILITY : The manufacturer should have adequate testing facility for all routine and acceptance tests and also arrangement for measurement of losses, resistance, etc. 29. ROUTINE TEST CERTIFICATE : The successful tenderer shall submit the routine test certificate alongwith documentary evidence for having paid the Excise Duty for the following raw materials at the time of routine testing of the fully assembled transformer : Oil, aluminium for conductors, insulating materials, core materials, bushings. 30. INSPECTION : In respect of raw materials such as core stamping, winding conductor, insulating paper and oil, you shall use these materials manufactured/supplied by the standard manufacturers and furnish the manufacturers' test certificates as well as the proof of purchase from these manufacturers (documentary evidence for having paid the Excise Duty) for information of the employer. The successful tenderer will give 15 days advance intimation to the employer to organize for stage inspection of the transformer in which the assembly of core and the winding could be inspected. The employer may at its option open a transformer supplied, in presence of supplier at site. If any of the technical particulars are seen to be in variance than the guaranteed technical particulars, the whole lot of transformer will be rejected. In addition to the above, the employer may pick up any transformer and decide to get it type tested from CPRI at any other suitable laboratory or by independent agency at employer's cost. The tenderer will have to organize packing of the transformer at MSEDCL's Stores for which they will be paid necessary charges. If the transformer fails to meet the requirement of type tests, the quantity of transformers ordered on them will be forthwith rejected and the employer may purchase these transformers at the risk and cost of the supplier. 31. INSPECTION & TESTING OF TRANSFORMER OIL : To ascertain the quality of the transformer oil, the original manufacturer's test report should be submitted at the time of inspection. Also arrangements should be made for testing of transformer oil, after taking out the sample from the manufactured MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 12 OF 21

13 trasnsformers and tested in the presence of employer's representative or in an independent laboratory. 32. LOADING OF TRANSFORMER : The transformer should comply with IS: SCHEDULES : 33.1 The tenderer shall fill in the following schedules, which form part of the tender specification and offer. In schedule `A' the specific values shall be furnished and only quoting of IS reference is not sufficient. If the schedules are not submitted duly filled in with the offer, the offer shall be liable fore rejection. Schedule `A' - Guaranteed Technical Particulars. Schedule `B' - Schedule of Deviations from Specification. Schedule `C' - Schedule of Tenderer's Experience. Schedule `D' - Schedule of Deviations from specified standards. Schedule `E' - Schedule of Deviations from specified Test Requirements All deviations from the specification shall be brought out in the schedules of deviation (Schedules `B', `D', & `E'). The discrepancies between the specification and the catalogs, Literatures and indicative drawings, which are subject to change, submitted as part of the offer, shall not be considered and representation in this regard will not be entertained The deviation brought out in the schedule shall be supported by authentic documents and clarifications; otherwise the offer may be liable for rejection The tenderer shall submit the list of orders for similar type of equipments, executed of under execution during the last three years, with full details in the schedule of Tenderer's experience (Schedule `C') to enable the employer to evaluate the tender. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 13 OF 21

14 SCHEDULE A GUARANTEED AND OTHER PARTICULARS FOR TRANSFORMERS Sr.No. Description Particulars 1. Make & Manufactured by : 2. Place of manufacture : 3. Voltage ratio : 4. Ratings in KVA : 5. Core material used & grade : 6. Maximum temp. rise of : a) Windings by Resistance : Method. b) Core by thermometer : c) Oil by thermometer : 7. Magnetising (No load) current a) Rated Voltage : Amps i.e. % of full load. b) Max. Voltage : Amps i.e. % of full load. (112.5% of rated voltage) 8. Core/no load loss in watts : at Rated voltage. 8. Resistance of windings at 20 deg.c. a) H.V. winding : b) L.V. winding : 10. Full load loss : 11. Current density used for : a) H.V. winding : b) L.V. winding : 12. Clearances a) Core & L.V. : b) LV & HV : c) HV Ph. To Ph. : MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 14 OF 21

15 d) End clearance to earth : e) Any point of winding : to tank 13. Efficiency at 75 dec. c at a) Unity P.F. & (b) 0.8 P.F. : a) b) i. 125% load : ii) 100% load : iii) 75% load : iv) 50% load : v) 25% load : 14. Regulation at - a) Unity P.F. & (b) 0.8 P.F. : a) b) at 75 dec.c. 15. % Impedance at 75 deg.c. : 16. Flash test - HV 28 KV for 1 minute : LV 3 KV for 1 minute : 17. Over potential test Double voltage & Double frequency For 1 Minute. 18. Impulse test value in KVp. : 19. Weight of a) Core lamination : Kg. b) Windings-Alu. : Kg. c) Tank and fittings : Kg. d) Oil : Kg. e) Oil : Ltr. f) Total weight : Kg. 20. Oil data 1) Quantity for first filling : Ltr. 2) Grade of oil used. : 3) Maker's name. : 4) BDV at the time of filling. : 21. Make of Breather & type : MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 15 OF 21

16 with capacity of silicagel filled In gm. 22. Transformers 1) Overall length x breadth x : height. 2) Tank length x breadth x : avg. height. 3) Thickness of plates for a) Side Plate : b) Too and Bottom plate : 23. 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% tuns of the Coil. 24. Insulation materials provided : a) for conductors 1) HV 2) LV : b) for core. 25. Size of the wire used 1) HV a) SWG : b) Dia. : c) Area : 2) LV a) Strip size : b) No. of conductors In parallel. c) Total area of cross: Section. 26. Does the name plate give all : MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 16 OF 21

17 Particulars as required in tender. 27. Particulars of bushings. 1) Maker's name : 2) Type IS-3347/IS-1180 : 3) Rating as per IS. : 4) Dry flashover voltage at : 50 cycles KV. 5) Watt flashover voltage : at 50 cycles KV. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 17 OF 21

18 SCHEDULE - B DEVIATIONS FROM SPECIFICATION SR.NO. CLAUSE No. DETAILS OF DEVIATION NAME OF FIRM NAME & SIGNATURE OF TENDERER DESIGNATION DATE MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 18 OF 21

19 SCHEDULE - C SCHEDULE OF TENDERER'S EXPERIENCE Tenderer shall furnish here a list of similar orders executed/under execution by him to whom a reference may be made by employer in case he considers such a reference necessary Sr. Name of client Value Period of supply Name & Address to No. & Description. Of Order & commissioning whom reference may Be made NAME OF FIRM NAME & SIGNATURE OF TENDERER DESIGNATION DATE MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 19 OF 21

20 SCHEDULE - D SCHEDULE OF DEVIATIONS FROM SPECIFIED STANDARDS Sr. Particulars Stipulation of Stipulation of Remarks No. specified standard adopted Standards. By tenderer Standard Stipula- Standard Stipulations Ref. tions. Ref NAME OF FIRM NAME & SIGNATURE OF TENDERER DESIGNATION DATE MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 20 OF 21

21 SCHEDULE - E DEVIATIONS FROM SPECIFIED TEST REQUIREMENTS SPECIFIED IN RELEVANT AND PRESENT SPECIFICATIONS Sr. Name of Test Standard Requirement Proposed Reasons No. No. & Cl.No. of standards deviation for deviation TYPE TEST 2. ADDL. TEST 3. ACCPTANCE TEST. 4. ROUTINE TEST. NAME OF FIRM NAME & SIGNATURE OF TENDERER DESIGNATION DATE MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD. PAGE 21 OF 21