Assam Rifles-AR has published Tender For Repair And Maintenance Of Certain Transformer In Laitkor Garrison. Submission Date for this Tender is 20-07-2023. Transformer Supply Tenders in East Khasi Hills Meghalaya. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Taking out the sample of transformer oil from each transformer at various locations for checking the dielectric strength and acidity test of oil for the presence of moist presence of moisture, impurities etc afterthe dehydration including de-hydration (Filtration) of transformer oil through mobile filtration plant to be usedto respective locations duly connecting inlet/outlet to the machine by switching off HT power supply and taking all safety precautions so as to achieve dielectric strength not less 36 to 40 KV per minute rupturing capacity and switch on supply, charging of transformer all as directed.Note:-(a) Testing of transformeroil before & after dehydration shall be carried out at siteas directed. (b). Oil required for topping up after dehydration and filtration shall be made available by contractor measured and paid againstScheduled item. (c)The rates are inclusive of transportation of mobile filtration plant from civil workshop to the locations of each transformer and back |
| 2 | M&L for Disconnecting and taking down of transformer indoor/outdoor type 11000/415 volts having capacity upto 750 KVA, transportation toworkshop for repairs, strip opening of transformer after unscrewing nuts /bolts screws and connected accessories such as breather, conservator tank, temp gauge, taking out the core for replacement of defective parts and transportation back to the site after repairs and installing, connecting up, testing and commissioning at the sitecomplete all as specified and directed. Notes : - (a) Transformer oil shall be drained out by the contractor in suitable capacity MS drums to be arranged by the contractor. The said drained out transformer oil shall be refilled in the transformer duly dehydrated after repair and the cost thereof shall be included in unit rate quoted against the respective item of this schedule. (b) Rewinding of both HT & LT coils shall be measured and paid for separately under respective item of this schedule. (c) Transportation charges for transportation of transformer from site to workshop and after repair, workshop to site shall be borne by the contractor and cost thereof shall be deemed to be included in the unit rate quoted for this item. (d) The said transformer shall be repaired in reputed workshop as directed. (e) Testing of transformer after repair shall be carried out with the following test and the cost of testing shall deem to be included in unit rate quoted against this item (f)The IR value of the dried winding before inserting the core in the shell shall not be less than 750 mega ohm with 5000 volts megger and record of the same shall be maintained. (g)Painting of transformer with one coat of super enamelled paintafter cleaning the oil from transformer body complete all as specified and directed. |
| 3 | Supply and replacement of LT/HT Coppercoils made out of super enameledcopper strip/wireof transformersall as specified and directed Note :- Coil to be replaced shall have same number of turns, gauge insulation value matching with manufacturer’s design. |
| 4 | Supply and fixing as in replacement HT/LT 11 KV bush suitable for indoor/outdoor type transformer upto 750 KVA, complete with & including brass stud, 4 Nos brass nuts & brass check nuts complete all as specifiedand directed. |
| 5 | Supply and replacement of Gasket suitable for transformer upto 250 KVA |
| 6 | Supply and replacement of Gasket suitable for transformer upto 350 KVA to 500 KVA |
| 7 | M&L in replacement of lightening arrestor expulsion type transmission class 65 KA 11000Volt suitable for HT overhead network including necessary connection with HT OH line all as specified and directed. |
| 8 | M&L for Painting of transformer of any size and capacitywith two coat synthetic enamel paint includingscrabing and cleaningcomplete all asdirected by Engr-in-Charge |
| 9 | Supply and fix silica gel breather complete set for transformer upto 500KVA ,11/430V |
| 10 | .-do- but for transformer 33/11 KV, 3.2/1.6MVA |
| 11 | Replacement of silica gel of transformer as desired |
| 12 | M & L for replacement of old unserviceabledrop out fuse unit 11 KV upto 20Amps complete |
| 13 | Supply and filling up of transformer oil as in topping up/levelling up after dehydration having dielectric strength not less than 40 KV at 4 mm gap conforming to IS -335/1993 all as specified and directed: Make:-Power oil/Savita/Apar |
| 14 | Earthing with GI earth plate 600mmx600mmx3mm thick including accessorise and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 meter long etc with charcal/ coke and salt as requied. |
| 15 | Providing and fixing 25 mm X 5 mm G.I. strip on surface or in recess for connections etc. as required |
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