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| 1 | Taking down unserviceable defective distribution transformer/power transformer of capacity 400 KVA and above upto 500 KVA (out door/Indoor type) from the existing site located in cantonment area after disconnecting the in/out connection, lifting with the help of suitable cranes etc, andtransporting the transformers to workshop/factory with suitable vehicles for repairs,testing and transporting the same back after repairs and installing, hoisting of transformers on two/four pole structure/plinthat height not less than 3 metre, making all electric connections with HT/LT side jumpers and leads including earth connections etc and testing, complete all as specified and directed. |
| 2 | All as per item No01 here-in-before but 150 KVA to 315 KVA. |
| 3 | All as per item No 01 here-in-before but 75 KVA to 125 KVA.Notes : for items 1 to 3 above :- (a) Oil container for collecting old transformer oil will be arranged by the contractor.(b)T&P such as chain pulley ,crane for loading, unloading ,trasporting and for installing and hoisting shall also be arranged by the contractor. |
| 4 | M & L for opening the top of defective transformer of any make and capacity 400 KVA to 500 KVA removing gasket and lifting up the core assembly carefully to check the condition of transformer for repairs, dismantling core lamination to the extent required for taking outdefective/ unserviceable coil for check after disconnecting all connections and re-assemblingof core lamination to original position after positioning of existing serviceable coil alongwith new coils carefully to check the condition of transformer to ascertain the repairs/replacement of items for repair including cleaning the tank, removing sludge, dirtcleaning the coils of limbs, re-fixing the core assembly and reassembling of transformer after repairs including zinc chromate paint inside , rewriting MES number & SM number with white paint, replacement of nuts bolts with washers, thimbles etc and connections with aluminium strip and including welding, denting etc and testing the transformer at factory/workshop . |
| 5 | All as per item No 04 here-in-before but 150 KVA to 315 KVA. |
| 6 | All as per item No 04 here-in-before but 75 KVAto125 KVA.Notes : for items 4 to 6 above :- (a) The payments of new coils and other parts to be replaced shall be made as supply only underitems here-in-before, cost of fixing these items is included in item No 4 to 6.(b) Cost of dehydration of transformer oil is not included under these items. |
| 7 | Supply onlyHT/ LT coil DPC aluminium wire /strip of existing size(gauge),grade and in weight complete with insulating material for transformers of capacity 75 KVA to 500 KVA complete all as directed and as specified. NOTE : Fixing charges of formed coil included in unit rate under Item 04 to 06above. |
| 8 | Supply only HT/LT coil DPC copper winding strip of existing size (gauge), grade and in weight complete with insulating material for transformers of capacity 75 KVA to 500 KVA, complete all as directed and as specified. NOTE : Fixing charges of formed coil included in unit rate under Item 04 to 06above |
| 9 | Supply & fix in replacement HTbrass spindlesincluding, heat resistance gasket, nuts, bolts, washers for transformers of capacity 75 KVA to 125 KVA as per existing type, dia and length complete all as directed and as specified. |
| 10 | All as per item No 9 here-in-before but for transformers of capacity 150 KVAto 315 KVA . |
| 11 | All as per item No 9 here-in-before but for transformers of capacity 400 KVAto 500 KVA. |
| 12 | Supply & fix in replacementHT porcelain bushing for transformers of capacity 75 KVA to 500KVA complete all as directed and as specified. |
| 13 | Supply & fix in replacementLT brass spindleincludingheat resistance gasket, nuts, bolts, washersfor transformers of capacity 75 KVA to 125KVA complete all as directed and as specified. |
| 14 | All as per item No 13 here-in-before but for transformers of capacity 150 KVAto 315 KVA . |
| 15 | All as per item No 13 here-in-before but for transformers of capacity 400 KVAto 500 KVA. |
| 16 | Supply & fix in replacementLTporcelain bushing for transformers of capacity 75 KVA to 500KVA complete all as directed and as specified. |
| 17 | Supply & fix silica gel breathers assembly filled with silica gel complete for transformers of capacity 75 KVA to 500 KVA complete all as directed and as specified. |
| 18 | Top up with fresh new transformer oil in transformers in-situand for newly rewinded transformer after filtration/dehydration with minimum dielectric strength of 60 KV complete all as directed and as specified. |
| 19 | Dehydration/filtration of transformers oil of existing transformers (out door/Indoor, step up/step down), at site by means of oil dehydration machine having arrangement for heating to remove the moisture silt/sludgeand wastage removing arrangement etc to make the oil fit for use in accordance with IS-1886 to achieve minimum dielectric strength of 60 KV by continuous process of dehydration complete including testing all as directed and as specified. (Testing machineshall be arranged by thecontactor) Note -(a) Electricity for running dehydration machine & testing, shall be provided by the department free of cost.(a) Any damage caused to transformer during dehydration/filtration shall be responsibility of the contactor. |
| 20 | Cleaning sprinkled transformer oil, grease and all other foreign materials from external surfaces of transformers of capacity 75 KVA to 200KVA and preparing the surface to receive paint and applying one coat of synthetic enamel paint (spray painting) including writing MES number and SM number with white paint over black base in letters not less than 10 cms in height complete all as specified and asdirected.NOTE :- Paintingshall be carried out at site. |
| 21 | All as per item No 20 here in before but transformers of 250KVA to 500 KVA capacity. |
| 22 | Supply only off load tap changing assembly with 7.5 tapping at the rate +/- 2.5 percent stepping including making connections and testing complete for transformers of capacity 75 KVA to 315 KVA complete all as directed and as specified. |
| 23 | All as per item No 22 here-in-before but for transformers of capacity 400 KVA to 500 KVA. |
| 24 | Supply only CRGO silicon core as per existing thickness, size & design for transformer 75 KVA to 500 KVA complete all as specified. |
| 25 | Opening the top of existing transformer at site of any make and capacity (at site) 75 KVA to 160 KVA, drainage of oil, stopage of leakage ,change ofgasket, oil rings, nuts, bolts & washers ,carefully re-fixing/refilling oilincluding replacement of gasket, oil rings, nuts bolts and washer complete all as directed and as specified. |
| 26 | All as per item No 25 hereinbefore but transformers of 200 KVA to 315 KVA capacity. |
| 27 | All as per item No 25 hereinbefore but transformers of 400 KVA to 500 KVA capacity. |
| 28 | M&L for Earthing in replacement complete with Galvanised Steel earth plate electrode 60cm x60cm x 6mm thick buried directly in ground earth pit not less than 2.25m deep below ground level with top edge of plate not less than 1.5m below normal ground level ,connected to and includingGalvanised Steel earth strip 32X6mm by means ofnut, bolts, check nuts and washers made of copper alloy and connection to test point and earth dolly and provision of charcoal dust and common salt packed all around the earth plate includingwatering pipe and protection pipe, necessary excavation and earth work in soft/loose soil and testing complete all as specified and directed and as shown in Electrical Plate No. 3 of MES SSR-2009 Part-I (Specifications) complete with the following:-(a) Excavation and earth work for drilling hole for electrode in any type of Soil/rock strata. (b) PCC chamber in cement concrete 1:3:6 type C-1, Pre-cast RCC cover with CI frame with suitable handle 50 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq meter. (c) Funnel with 15mm bore galvanised iron light grade watering pipe and lugs etc complete all as specified and directed. (d) 40 mm bore galvanised iron light grade protection pipe for protection of earthing lead and earth lead, each 7.5m longcomplete all as specified and directed. (e) Requisite quantity of common salt and charcoal.Note:-GI earth strip and 50mm medium gradeGI protection pipe upto 7.5m each shall be deemed to be included in quoted rate of this item. (ii) If the desire earth resisitance not obtained on testing after completion, earthing shall be redone by the contractor without any extra cost upto obtain the desired resistance. (iii) Tibba sand shall be shall be used by the contractor after filling of salt and charcoal for earthing. |
| 29 | Supply and spreading 40 mm graded stone aggrgate in substation yard complete all as specified. |
| 30 | Material & labour foraluminium strip 25mm x 3.15 mm with saddle and fixing screw with Busbar insulators etc roof conductors and down conductors above ground level, complete all as specified. |
| 31 | M&L for mild steel bars 10mm dia (Fe-410-W (Gde.E-250) quality-A or Fe 290 (Gde - E-165) and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9 mm dia or securing with clips all as directed. |
