REPAIR MAINTENANCE OF TRANSFORMER FEEDER PILLAR BOX DG SETS INCINERATOR AND ALLIED WORKS AT HAPPY VALLEY UNDER GE SHILLONG

Amount

Filtration and dehydration of transformer oil and removing sludge by continuous circulation through filtration plant with strip heater and improvement of dielectric strength to minimum 40 KV at 4mm gap of electrode for 63 KVA to 500 KVA capacities of transformer including refilling of filtered transformer oil complete all as specified and as directed by Engineer-in-Charge.

M&L for Topping up / replacement of transformer oil with new transformer oil suitable for working voltage 11000 volts grade, including necessary dehydration to achieve dielectric strength min 40 KV at 4mm gap transformer for various capacities of transformer complete all as directed. Make of transformer oil : Gulf /Castrol /HP /IOC/BP. Notes : For Ser Item No 1 & 2 (a) New transformer oil (ISI marked) shall be supplied by the contractor in sealed container with original manufacturing test certificate. (b) Filtration/dehydration of transformer oil shall be carried out at the location where transformer is installed and necessary tools & instruments shall be brought at working site by the contractor. (c) During the process of filtration, transformer will be on load condition. (d) The old unserviceable transformer oil shall be sold to the contractor under schedule of credit. (e) Filtration and topping up work of transformer shall only be carried out by manufacturer of transformer or its authorised agent.

Supply and replacement of silica gel grains in the breather assembly of transformers of various capacities including removal of old unserviceable one etc complete all as specified and as directed by Engineer-in-Charge.

Supply and replacement of breather assembly of size 50mm dia, min 250mm long for transformer of various capacities including removal of old unserviceable one etc complete all as specified and as directed by Engineer-in-Charge.

S&F in repair transformer temperature gauge, dial type, having temperature range 0 to 120˚C etc complete all as specified and as directed by Engineer-in-Charge.

Opening of top cover by unscrewing all nuts, bolts and washers for replacement of transformer HT/LT bushing, lifting of core assembly, cleaning and refixing the complete unit with new cork sheet, gasket, existing / wherever required with new nuts, bolts and washers for transformer capacity 63 to 500 KVA indoor/outdoor type complete all as directed by Engineer-in-Charge. Note: - (i) HT/LT bushing shall be measured and paid separately under relevant items of these schedule as 'supply only' items and labour element involved for replacing the same shall deemed to be included in the rate quoted by the tenderer in this item. (ii) Repair works carried out by manufacturer of transformer or its authorized agent.

Supply only HT porcelain bushing suitable for 11 KV grade complete with brass rod & rubber bush, for 63 to 500 KVA capacities of transformer complete all as specified and as directed.

Supply only LT bushing suitable for 1100 volts grade complete with brass rod & rubber bush for the rating 63 to 500 KVA capacities indoor/outdoor transformer complete all as specified and as directed.

M&L for Shifting of transformer carefully of capacity of 63 - 500 KVA from its position upto road n.exc 50 m high by manually or chain pulley arrangement and carrying it to other installation by vehicle (Recovery Van) within Cantonment area n.exe 2KM and install it to new places including commissioning and testing complete all as directed by Engineer-in-Charge.Note:- All necessary requirement of Vehicles and other equipments shall be arranged and payment of the same done by contractors only.

Servicing and repair to 11KV/415V Transformer of capacity 63-500KVA including the following works :- (a) Transport the transformer to workshop and return back after servicing including installation and commissioning and testing complete all as directed by Engineer-in-Charge. (b) Dismantling the transformer limb, draining out transformer oil and lifting the core coil assembly, keep the assembly in oven up to obtain required IR value of the transformer winding complete all as directed by Engineer-in-Charge. (c) Cleaning the core coil assembly by oil complete and remove the dirt, sludge in the coil and core gently without making damage of insulation complete all as directed by Engineer-in-Charge. (d) Cleaning inside the chamber of transformer, scrapping complete all sludge and iron particle. (e) M & L Two coats of oil resistance paint on inside surfaces of transformer over a coat of red oxide metal primer. (f) Re-assembling all dismantled parts including provision of new gaskets, spacers, nut, bolt refilling with new transformer oil. Note :-(i) The servicing of transformer carried out by authorized dealer of manufacturer of transformer. (ii) Oil filtration, supply of new oil will be measured and paid separately. (iii) All petty parts including nut, bolts, gaskets, minor welding deemed to be included in the rate quoted. (iv) All defective spare parts shall be approved by Board of Officers conveyed by Accepting Officers for replacement.

M & L Rewinding of HT coils suitable for 11000 volts grade with new super enamelled copper wire having Class - F insulation as per existing size and turns for capacity of transformer 63- 500 KVA complete all as directed by Engineer-in-Charge.

M & L Rewinding of LT coils suitable for 1100 volt grade with new DPC copper wire having Class F insulation as per existing size and turns for capacity of transformer 63 to 500 KVA complete all as directed by Engineer-in-Charge.

Supply and replace conservator oil inspection glass after opening by unscrewing nuts, bolts and washers and replacement with heat resistance glass of size n. exe 75 Sqmm and 3mm thick complete with new cork sheet, gasket, nuts, bolts and washers complete all as specified and directed.

M & L Painting of transformer outer surface with one coat of synthetic enamel paint for transformer capacity 63- 500 KVA after preparation of old painted surface by spray painting complete all as directed by Engineer-in-Charge.

Supply and replace HT / LT side terminal box made out of mild steel SA 40 x 40 x 5 angle iron and 2mm thick MS sheet including removable cover with required holes on flange to fix at body of transformer and removable cover and fixing with new cork sheet gasket with nuts, bolts and washers including one coat of synthetic enamel paint as under coat and one as finishing coat to both side of box complete all as directed by Engineer-in-Charge.

S&F in repairs Gun metal gate valve (ISI marked) Class-I, 32 mm bore with iron wheel head screwed both ends for iron pipe suitable for following bore of pipe including taking down old unserviceable one complete all as speficied and directed.

S&F in repairs Gun metal gate valve (ISI marked) Class-I, 25 mm bore with iron wheel head screwed both ends for iron pipe suitable for following bore of pipe including taking down old unserviceable one complete all as speficied and directed.

M&L for replacing of old unserviceable Engine oil from diesel driven Gen set and filling new Engine oil (ISI marked) 20W40 etc complete all as specified and as directed. Make:- Castrol / Mobil / Helix .

Supply and fix in repair lubricant oil filter of the following Engine complete all as specified and as directed. (a) DG set 180 KVA Make- Kirlosker . H/V Pump House SM No: 111242.

DG set Kirloskar 180KVA Kirloskar H/V Pump House SM No: 158094.

DG set Cummins 75KVA Kirloskar H/V Power House SM No: JC/WC/75/SIL/5983K.

DG set Cummins 63KVA Kirloskar H/V 11WEU M/C No: 024/6081/DG/07.

DG set Kirloskar 63KVA Kirloskar H/V Pump House M/C No: 024/6040/04/DG/03.

DG set Kirloskar 40KVA Kirloskar RR Hill SM No: 158077.

DG set Kirloskar 40KVA Kirloskar ARC Record M/C No: 024/6091/DG/06.

DG set Kirloskar 35KVA Kirloskar ARC Drona M/C No: 024/6097/DG/07.

DG set Kirloskar 35KVA Kirloskar GTC Drona M/C No: 024/6092/DG/06.

DG set Kirloskar 5KVA Kirloskar MDC Happy Valley D3/609-92/1000599.

S&F flexible pipe set , 2.5 meter long, ISI marked, suitable for transportation / filling of fuel from diesel filter to fuel tank etc complete all as specified and as directed .

Supply only Coolent suitable for DG Sets etc complete all as specified and as directed. Make- Fleet Guard or equivalent make as approved by Accepting officer.

Supply and fix in repair Diesel oil filter of the following Engine complete all as specified and as directed. (a) DG set Kirlosker 180KVA Kirlosker H/V Pump House SM No: 111242.

DG set Kirlosker 180KVA Kirlosker H/V Pump House SM No: 111242.

DG set Kirlosker 180KVA Kirlosker H/V Pump House SM No: 158094.

DG set Cummins 75KVA Kirlosker H/V Power House SM No: JC/WC/75/SIL/5983K.

DG set Cummins 63KVA Kirlosker H/V 11WEU M/C No: 024/6081/DG/07.

DG set Kirlosker 63KVA Kirlosker H/V Pump House M/C No: 024/6040/04/DG/03.

DG set Kirlosker 40KVA Kirlosker RR Hill SM No: 158077.

DG set Kirlosker 40KVA Kirlosker ARC Record M/C No: 024/6091/DG/06.

DG set Kirlosker 35KVA Kirlosker ARC Drona M/C No: 024/6097/DG/07.

DG set Kirlosker 35KVA Kirlosker GTC Drona M/C No: 024/6092/DG/06.

S&F Solonied switch Part No: F683810000. etc complete all as specified and as directed .

Repair / overhauling including servicing of Dynamo assembly of 12 volt of any make / type , rewinding of armature and field coil with super enamelled copeer including replacement of unserviceable bearing / bushing, carbon bush etc with new one etc all as required to make dynamo 100% serviceable complete all as directed by Engineer-in-Charge.

Arbind Enterprise