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| 1 | Taking down existing transformer 400/315/250/160 kVA by disconnecting its HT/LT connection, Lifting, transportation and deposit to MES store yard from work site at distance of approx 3 Km, all as specified and directed. |
| 2 | Taking down existing OCB 11 kV by disconnecting its HT connection, Lifting, transportation and deposit to MES store yard from work site at distance of approx 1 Km all as specified and directed. |
| 3 | Supply, install, testing and commissioning of copper wound Oil cooled Step Down, Outdoor type transformer (Level-2) complete with standard fittings, HT 22 KV 3 Phase, LT 433 volts, 3 Phase 4 wire with off load tappings on HT side to vary secondary voltage within limit, all as per IS:1180 of capacity 400kVA complete all as specified and directed. |
| 4 | Supply, install, testing and commissioning of copper wound Oil cooled step down, outdoor type transformer (Level-2) complete with standard fittings, HT 22 KV 3 Phase, LT 433 volts, 3 Phase 4 wire with off load tappings on HT side to vary secondary voltage within limit, all as per IS:1180 of capacity 315 kVA complete all as specified and directed. |
| 5 | Supply, install, testing and commissioning of copper wound Oil cooled step down, outdoor type transformer (Level -2) complete with standard fittings, HT 22 KV 3 Phase, LT 433 volts, 3 Phase 4 wire with off load tappings on HT side to vary secondary voltage within limit, all as per IS:1180 of capacity 250 kVA complete all as specified and directed. |
| 6 | Supply, install, testing and commissioning of copper wound Oil cooled step down, outdoor type dual HV transformer (Level-2) complete with standard fittings, HT 22 KV/11 KV 3 Phase, LT 433 volts, 3 Phase 4 wire with off load tappings on HT side to vary secondary voltage within limit, all as per IS:2026 of capacity 160 KVA including foundation as per OEM recommendations, complete all as specified and directed. |
| 7 | SPECIFICATIONS FOR SER. ITEM No 3.00 TO 6.00 ABOVE :- Tapping on HV [%] : 7.5 to ˗7.5 in step of 2.5%, 7 tapsPhase & Frequency : 3 Phase & 50 HzConnection : Delta StarVector Group : DYN 11Cooling : ONANInsulation : Class A The Transformers shall also be provided with following Terminal Arrangement & Fittings and rate quoted against respective item is deemed to be included for the same:Terminal Arrangement:-[a] LV Side: Cable Box & HV side : Open bare bush with LA and arcing horns protection[b] Quad furcating cable box with five compression glands for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side.[c] First filling of new and unused Transformer Oil [IS – 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil.[d] Routine tests mentioned in these tender documents and relevant IS are to be followed. |
| 8 | Ser. Item No. 6.00 Contd...Fittings /Accessories :-[a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device.-01 No[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug-01 No[c] Pressure Release Valve-01 No[d] Oil filling hole cum air release plug[e] Drain Valve cum Sampling Valve -01 No[f] Top Filter Valve with Plug -01 No[g] Rating Plate & Diagram Plate - 01 No.[h] Lifting lugs for Transformer -02 Nos[j] Lifting lugs for Core -02 Nos[k] Earthing Terminals -2 Nos[l] Thermometer Pockets-01 No[m] Silica Gel Breather-01 No[n] Explosion Vent- 01 No [o] Bidirectional CI rooler -04 Nos[p] Arching horn -03 Nos[q] 100mm size Oil Temperature indicator, dial type with alarm and trip contacts- 01 No[r] 100mm size Winding Temperature indicator, dial type with alarm and trip contacts-01 No |
| 9 | Supply, install, testing and commissioning step down distribution transformer 315 KVA copper wound (Level -2), Outdoor type 11000/433 volt 3 phase 4 wire 50 cycles, naturally oil cooled type suitable for outdoor installation, connected delta on HV side and star on LV side with neutral brought out LT side with solid earthing system with off load tap changing switch on HT side to vary secondary voltage in steps of 2.5% each with in limit and with standard accessories as per IS : 1180 like oil temperature gauge with highest temperature indicator, silica gel breather assembly, oil conservator tank with oil filling hole duly plugged, HT side open bare bush with LA and arcing horns protection and LV side cable box, CI roller wheels, lifting lugs, explosion vent, air release plug, earthing terminals, oil drain valve of gun metal with plug, oil filter valve with plug, name rating and diagram plate, oil level indicator and arching horn set and other fittings/ accessories and for standard requirement first fill oil including connections complete all as specified and directed by Engr-in- Charge. |
| 10 | Supply of HT 11KV, 3Phase 50Hz, repturing capacity 350 MVA, Indoor, totally metal clad withdraw able type Vacuum Circuit Breaker Outgoing panels with Copper bus bar of suitable rating, horizontal isolation type VCB of capacity minimum 630Amps rated current, as per IEC 62271-100-200. The switchgear panel shall be of sheet steel construction with ALUZINC not less than 2.5mm thickness for load bearing section and not less than 2 mm thickness for non-load bearing and shall be totally dust and vermin proof. The offered panels shall be tested for IAC level of 25kA, complete all as specified and as directed.(Note : All the main components like VCB/ Relays/ Meters shall be of same make) |
| 11 | SER. ITEM NO. 8.00 Contd...Panel and VCB parameters are as below:-(i) Rated Voltage level/ PF withstand voltage/ Impulse level:11KV/ 28 kV/ 75 kVp(ii) Continuous current rating: minimum 630A(iii) Short circuit withstand current: minimum 25KA for 3sec.(iv) One no. minimum 630 Amps horizontal draw out type vacuum circuit breaker in 11KV metal clad floor mounting panel complete with following :-(a ) Manually & Motor operated(230V,AC,50Hz) spring charged type, manually and electrically open (electrical – 110 VDC) operation type, incorporating mechanical as well as electrical ON/OFF indication \\"OFF\\" push button, test/service position limit switches, with minimum 6NO+6NC breaker auxiliary contacts in C5 service position. (b)Epoxy cast wound current transformer (CT),11KV of ratio100-50/1-1 A metering and protection core including necessary control wiring |
| 12 | SER. ITEM NO. 8.00 Contd...A) Protection arrangements for the breaker shall comprise of the following:i) E/F, O/C & S/C Numerical Protection Relay of Make Schneider/ ABB/SIEMENS(ii) Complete with Master Trip/ Anti pumping relay. (iii) Auxillary Relay Alarm/Trip OTI/WTIAll the Relays shall belong to a common platform and shall be of single make with Electromechanical Relays in Draw-out casing(B) The following meters, indications and accessories are to be provided with the panel:(i) Digital Ammeter range of applicable range with necessary ammeter with built in selector switch dual graduated scale 96X96 sq mm dial with shrouded terminal.(ii) Necessary DC supply, healthy indication lamp & switch.(iii) Control: (a) TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement, (b) Local/Remote selector switch for breaker open/close operations. |
| 13 | S&F in replacement earthing marker made out of 3mm thick MS sheet of suitable size (as approved by Engr-in-charge) duly painted with two coats black paint over a coat of red oxide primer, writing (type of earthing) and mentioned the Nos of earthing and mounted on angle iron 40x40x3mm, angle height 45 cm, ( 30 cm below ground level) with PCC 20 cm x 20cm x 20 cm complete all as specified and directed. |
| 14 | Supply, jointing & testing outdoor end termination cable joininting kit, heat shrinkable type 22 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 95 Sqmm all as specified and as directed. |
| 15 | Supply, jointing & testing outdoor end termination cable joininting kit,heat shrinkable type 22 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 120 Sqmm all as specified and as directed. |
| 16 | Supply, jointing & testing in replacement Cable jointing kit for 11 KV grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured conductor cable of size 3 core 120 Sqmm complete all as specified and as directed. |
| 17 | Supply, jointing & testing in replacement Cable jointing kit for 11 KV grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured conductor cable of size 3 core 120 Sqmm all as specified and as directed. |
| 18 | M&L for Earthing complete with Galvanised Steel Earth Plate Electrode 600 X 600 X 6 mm thick buried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to 32 X 6mm GI Strip [Earth Lead] and GI pipe 50 mm, Medium Grade for earthing lead protection to the extent of maximum 7.5m, Earth Plate Electrode surrounded by 150mm thick packed layers of Charcoal and Common Salt filled in alternate layers, connected to the Plate by means of GI Bolts & Nuts complete all as per Electrical Plate No. 3 of SSR Part – I, connected to panel / DB including testing on completion including main earthing, Charcoal, Common Salt, PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover, 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm Angle Iron, MS Funnel with 20 mm bore, medium grade GI Watering pipe, wire mesh, earth work excavation, return filling, removal of surplus soil etc. and disconnecting and taking down existing earthing of any description complete all as specified and as directed.(NOTE :- GI strip and GI pipe 50mm bore medium grade for encasing GI strip upto 7.50m length per earthing shall be deemed to be included in the unit rate.) |
| 19 | S & F in repairs Earth continuity Conductor or main earthing lead made of GI Strip of size 32 X 6mm, fixed to wall on batten or recess or chases or burried in ground or fixed to poles or any other indicated situation including drawing through GI Pipe for earthing etc. complete all as specified and as directed. |
| 20 | NOTES FOR SER. ITEM NO. 3.00 TO 7.00 ABOVE :(a) The OEM of the transformers should have in house LAB Certificate for Accreditation from National Accreditation Board for Testing and Calibration laboratories. (b) Manufacturer /OEM must have type test / short circuit reports for each & every rating from CPRI / ERDA (matching all the major parameters including the Loss Figure) shall not be older than 5 years.(c) CPRI Short circuit test report for exactly similar transformer (matching all major electrical parameters including Loss Figure) shall not be older than 5 years to be furnished).(d) OEM should be BIS and BEE certified for all the ratings of the transformer that are to be submitted.(e) BLANK.(f) BLANK(g) The transformer shall have complete standard fittings such as two earthing terminals with earthing symbols for body, Air release device, rating and terminal marking plates, conservator tank with oil filling hole, filter type drain valve and oil level gauge. The transformer shall also have dehydrating breather with first fill of dehydrating agent (silica Gel), drain cum sampling valve, winding temperature indicator and oil temperature indicator, lifting lugs for the complete transformer as well as core and winding assembly, pressure release device/explosion vent, unidirectional flat rollers, inspection holes, LV earthing arrangement.(h) HT side open bare bush with LA and arcing horns protection consisting of 3 numbers of Porcelain bushing with Brass rods complete with nuts and washers, taping out 3 core HT cable 22 KV / 11KV grade of size upto 185 Sqmm and a LT side cable box consisting of 4 numbers of porcelain bushing with Brass rods (Bimetallic flexible connecter and copper bus bar of suitable rated capacity with insulator support) and an additional neutral terminal brought outside the LV cable box for earthing etcwith complete with nuts and washers, with cable glands suitable for reception / taping out 3.5 core LT cable 1100 V grade of size upto 400 Sqmm.(j) The contractor shall submit a letter of acceptance from the transformer manufacturer along with a sample, seeking approval. The manufacturer must clearly confirm in the letter that their company agrees to provide all requisite details and documentationand certification requirements as mentioned in the succeeding paragraphs. |
| 21 | NOTES FOR SER. ITEM NO. 3.00 TO 7.00 ABOVE (Contd....)(k) Expenses/cost of FAT and necessary travel/freight/conveyance/stay expense for inspecting/testing officers as nominated by accepting officer for FAT shall be included in the rate quoted.(l) The existing transformer currently supplies power to vital installations as directed by EIC. Therefore, uninterrupted power supply must be ensured during the transition phase. Until the new transformer is fully installed and commissioned, the existing transformer must be temporarily shifted to a nearby suitable location to continue providing power. Man and material required for this temporary arrangement is deemed to be included in the abve work. Man and material for adequate temporary fencing is to be provided around the temporarily relocated transformer to ensure safety and prevent unauthorized access.(m) The contractor or his authorized representative shall submit the complete documentation and certificates to the Factory Acceptance Testing officer detailed by the department. The details shall include but not be limited to : (i) Rating of Tapping parameters/steps of the transformer. (ii) Maximum permissible temperature rise in the Core and Oil of transformer. (iii) Manufacturer details of the material used in core/winding conforming to CRGO specifications, including, Grade of CRGO, name of the manufacturer along with supporting documents such as invoice copy, mill test certificate, customs certificate, and any other relevant proof. (iv) Test report of the Flux density of the core. (v) Test report of the Overflux withstand capacity, including duration (in minutes) the transformer can sustain for in overflux conditions. (vi) Test report for Noise level of the transformer, as per standard norms. (vii) No-load current consumptionPercentage of the transformer. (viii) Burr level certificate indicating maximum burr level value in the transformer. (ix) Certification of purity of copper used in transformer winding.(n) All transformer test reports must clearly indicate that they pertain to the transformer itself, along with the acceptance parameters and the applicable Technical Authority or literature—such as IS 1180:2014 (Part I) and its subsequent amendments, IS/IEC 60076, CBIP Manual 317, NEMA standards, or any other recognized Government authorized body. Please Enable Macros to View BoQ information |
