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| 1 | Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, indoor type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 1600 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class \"A\" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part-I], Level-3 with latest amendment including dismantling of old transformer of any type and capacity with connected accessories including shifting the same to MES store yard of AGE E/M (Dolphin hill) complete all as specified and as directed and comprising of the following Specification and Fittings:-Continuous Rating : 1600 KVANo-Load Voltage Ratio: 11 KV / 433 V Tapping on HV[%] : ± 7.5, ± 5, ± 2.5Phase & Frequency : 3 Phase & 50 HzConnection: Delta StarVector Group: DYN 11Cooling : ONANType : Outdoor with HV cable Box and LV bus duct connection |
| 2 | Fittings:[a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device.[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug[c] Undercarriage with four plain rollers[d] Oil filling hole cum air release plug[e] Drain Valve cum Sampling Valve[f] Top Filter Valve with Plug[g] Rating Plate with Diagram Plate[h] Lifting lugs for Transformer[j] Lifting lugs for Core[k] Earthing Terminals[l] Thermometer Pockets[m] Silica Gel Breather[n] Explosion Vent[o] Double Float Buchholz with alarm and trip contacts including control cable of copper conductor of size & length from Marshalling Box to Relay of VCB[p] 150mm size Oil Temperature indicator, dial type with alarm and trip contacts[q] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts[r] Buchholz Relay with 2 Shut-Off Valves[s] Marshalling Box with Double Window |
| 3 | Terminal Arrangement:[i] HV side: Cable Box and LV Side: Bus Duct connection[ii] 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.[iii] 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.[iv] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.[v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate[vi] Platform for placement ofTransformer shall be as per the manufacturer\"s instructions complete all as specified and as directed. The cost of platform is deemed to be included in the quoted rate. [vii] The drawings of the transformer should be approved by the accepting officer before placing order.[viii] The factory acceptance test to be done by the rep of Accepting officer prior to dispatch. |
| 4 | Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 500 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class \"A\" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part-I], Level-3 with latest amendment including dismantling of old transformer of any type and capacity with connected accessories including shifting the same to MES store yard of AGE E/M (Dolphin hill) complete all as specified and as directed and comprising of the following Specification and Fittings:-Continuous Rating : 500 KVANo-Load Voltage Ratio: 11 KV / 433 V Tapping on HV[%] : ± 7.5, ± 5, ± 2.5Phase & Frequency : 3 Phase & 50 HzConnection: Delta StarVector Group: DYN 11Cooling : ONANType : Outdoor with HV/LV cable Box |
| 5 | Fittings:[a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device.[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug[c] Undercarriage with four plain rollers[d] Oil filling hole cum air release plug[e] Drain Valve cum Sampling Valve[f] Top Filter Valve with Plug[g] Rating Plate with Diagram Plate[h] Lifting lugs for Transformer[j] Lifting lugs for Core[k] Earthing Terminals[l] Thermometer Pockets[m] Silica Gel Breather[n] Explosion Vent[o] Double Float Buchholz with alarm and trip contacts including control cable of copper conductor of size & length from Marshalling Box to Relay of VCB[p] 150mm size Oil Temperature indicator, dial type with alarm and trip contacts[q] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts[r] Buchholz Relay with 2 Shut-Off Valves[s] Marshalling Box with Double Window |
| 6 | Terminal Arrangement:[i] HV & LV side: Cable Box [ii] 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.[iii] 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.[iv] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.[v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate[vi] The drawings of the transformer should be approved by the accepting officer before placing order.[vii] The factory acceptance test to be done by the rep of Accepting officer prior to dispatch. |
| 7 | [viii] Platform: Platform for the transformer shall be provided as per IE rules of size not less than 2.0mx2.0mx1.8m made of brick masonry using fly ash bricks built in CM 1:6 over 100mm thick concrete bed in PCC 1:4:8, type D-2 using 40mm graded stone aggregate over 150mm thick hard core of gauge not exc 63mm of broken stone or boulders, deposited, spread and levelled in layers including providing 100mm thick PCC 1:2:4 coping in type B-1 over top of platform and rendering 15mm thick in CM 1:4 finishing the surfaces even and smooth without using extra cement and applying three coats of white wash including necessary excavation, earth work as required complete all as per manufacturers instructions and as directed by the Engineer-in-Charge |
| 8 | Supplying, laying and testing HT UG cable [earthed], XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] with aluminium conductor of size 3 Core 185 Sqmm laid in trenches, fixed to walls or passing through pipes and connecting up complete all as specified and as directed. |
| 9 | S & F in repairs Cable Jointing Kit for 11 KV [Earthed] Grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm, complete all as specified and as directed. |
| 10 | S & F in repairs Cable Jointing Kit for 11 KV [Earthed] Grade cable for straight through joint heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm, complete all as specified and as directed. |
| 11 | M & L for disconnecting electrical connection of defective / burnt portion of HT UG cable of any size 3 core from transformer including necessary excavation and taking out the required length of existing cable from the loop, cutting the defective portion of old cable termination at the end and refilling of cable trench with existing sand and brick covers complete all as directed by the Engineer-in-charge |
| 12 | Earthing complete with Galvanized steel earth plate electrode of size 600x600x6mm thick buried directly in ground with earth pit not less than 2.25m deep below the normal ground level with top edge of plate not less than 1.5m below normal GL connected with galvanised earth strip 32x6mm as earth lead by means of bolts, nuts, check nuts and washers of Galvanized iron or steel all as shown in electrical plate No. 3 of SSR Part-I connected to earthing test point all as specified or indicated including testing on completion including taking out old perished earth pits complete all as directed.[Note: The unit rate shall be deemed to include for excavation & earth work in any type of soil, PCC (1:3:6) type C1 chamber, MS angle iron frame 40x40x6mm, RCC 1:2:4 type B-1 cover 40mm thick with 8mm dia steel reinforcement bars at 150mm c/c both ways, MS handle 12mm dia, CI funnel and wire mesh, GI watering pipe 20mm dia medium grade for watering, GI protection pipe light grade 40mm dia, earthing lead upto 7.5m including taking down old earrthing sets complete all as specified in preambles of SSR Part-II and as shown in plate No. 3 of SSR Part-I.] |
| 13 | S & F in repairs GI strip of size 32x6mm with saddles and fixing screws etc. for roof conductors and down conductors laid in trench/ floor including necessary clamps, nuts, bolts, and hylem sheet block complete all as directed |
