REPAIR / MAINT OF TRANSFORMER AND OTHER CONNECTED WORKS IN TECHNICAL AREA AT AF STN HASIMARA.

Amount

Note 1:- (Applicable for all parts/items) : The biidders/contractors are advised to read tender documents & all corrigendum/amendments and general condition of contracts before entry/quoting the rates. Note 2:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected. Fixed credit has been given in technical documents which shall be taken into account during acceptance of bid/tender.

M&L for Repair / servicing of transformer in situ of any make, any type, any capacity 630 KVA to 750 KVA (step up or down) installed at various location in Tech area comprising with the following works :- (a) Taking out transformer oil upto required level and keeping in empty container with safe custody for re-use after Dehydration. (b) Opening of top cover of transformer and keeping aside and re-fixing the same after tightening of all LT and HT terminal joints (both inside and out side of transformer) including supply and replacement of all gasket of bushing (6 mm thick rubberized cork sheet) to make leak proof. (c) Checking of tap changer connections and tightening and soldering properly for smooth functioning. (d) Cleaning of LT and HT Bushing, Replacement of burnt out bushing stud made out of brass, washer, nut, porcelain bushing of existing size, terminals, oil indication glass of conservator, top gasket and drain valve etc as directed by the Engineer-in-Charge. (e) Cleaning of oil tank of transformer, conservator, core, vent pipes, cooling pipe / fins by desludging, decarbonizing and finally washing with transformer oil and drying complete. (f) Dehydration and filteration of transformer oil from Transformer (s) to achieve di-electric strength not less than 40 KV on 2.5mm over gap for a period of one minute and testing of acidity of oil and dielectric strength (before and after dehydration / filtration) complete all as specified and as directed by the Engineer-in-Charge. (g) Top up new transformer oil upto desired level over existing dehydrated oil.

Note :- (i) Replacement of unserviceable bushing (HT/LT) and terminals shall be measured and paid separately under respective item, under respective items. (ii) New transformer oil shall be measured separately under respective items. (iii) Any minor parts such as gasket, nuts, bolts, washers etc that are required to be replaced for satisfactory completion of work shall be provided by the contractor and rate for the same shall be deemed to be included with the unit rate. (iv) Cost for dehydration and filteration of transformer oil shall be deemed to be included with the unit rate.

All as per Item no 01.00 here-in-before but for capacity 315 KVA to 500 KVA complete all as specified and directed.

All as per Item no 01.00 here-in-before but for capacity 100 to 250 KVA complete all as specified and directed.

Taking down burnt out transformer of capacity 75 to 160 KVA by disconnecting all cable connection and carrying to work shop for repair and following jobs including all as mentioned in item no-1.00 and reassembling the transformer after necessary repairs complete all as specified and as directed.:- (a) Dismantling of transformer complete (part by part) without damaging any parts / winding / core and setting aside for inspection of the Engineer-in-Charge including de-canning of transformer oil and keeping in empty barrel. (b) Repair / re-winding of HT/LT coils by replacing burnt / worn out part / coil as per the existing size of aluminium/copper wire / strip as required. Note : (i) Winding of HT/LT coils shall be measured and paid separately. (c) Carrying/ transportation cost of the transformer from site to workshop and workshop to site and setting in position including connecting all cables (HT/LT) and commissioning and testing with load complete is deemed to be included in unit rate quoted. (ii) Transformer oil shall be measured and paid separately. (iii) In case HT/LT bushing and stud required replacement, the same shall be measured and paid separately against respective items of Sch ‘A’ (iv) Complete gasket set shall be replaced by the contractor and rate for the same shall be deemed to be included with the unit rate. (v) Any minor parts such as nuts, bolts, washers etc those are required to be replaced for satisfactory repair but are not covered under Sch ‘A’ are to be supplied by the Contractor and rate for the same shall also be deemed to be included with the unit rate.

All as per item No 04.00 above but capacity of transformer 200 to 250 KVA complete all as specified and directed.

All as per item No 04.00 above but capacity of transformer 250 to 500 KVA complete all as specified and directed.

Supply only following items to incorporate against different items of Sch ‘A’ (Fixing charges are deemed to be included with connected Sch ‘A’ items where the parts are required to replace :-

Supply only HT porcelain bush set 11 KV for out door transformer of any size as per site requirement of capacity ranging from 25 KVA to 200 KVA complete all as specified and directed.

All as per item No. 7.01 above but capacity ranging from 250 KVA to 500 KVA complete all as specified and directed.

All as per item No. 7.01 above but capacity ranging 630 to 750 KVA complete all as specified and directed.

Supply only LT termination porcelain bush of outdoor / indoor transformer of capacity ranging from 25 KVA to 200 KVA as per site requirement complete all as specified and directed.

All as per item No 7.04 above but capacity ranging from 250 KVA to 500 KVA complete all as specified and directed.

All as per item No. 7.04 above but capacity ranging 630 to 750 KVA complete all as specified and directed.

Supply only HT 11 KV terminals stud with nuts, washers made out of brass of suitable size as per site requirement for transformer ranging from 25 KVA to 200 KVA complete all as specified and directed.

All as per item No 7.07 above but capacity ranging form 250 KVA 500 KVA complete all as specified and directed.

All as per item No 7.07 above but capacity ranging form 630 KVA 750 KVA complete all as specified and directed

Supply only LT terminals stud made out of brass with nut and washer, suitable for transformer of capacity ranging from 25 KVA to 200 KVA complete all as specified and directed.

All as per item No.7.10 above but capacity ranging from 250 KVA to 500 KVA complete all as specified and directed.

All as per item No. 7.10 above but capacity ranging from 630 KVA to 750 KVA complete all as specified and directed.

S&F dial type temperature gauge compatible with the existing system of transformer including taking down unserviceable one complete all as specified and as directed.

S&F fully transparent breather assembly for transformer of capacity 25 KVA to 200 KVA including taking down unserviceable one complete all as specified and as directed.

S&F fully transparent breather assembly for transformer of capacity 250 KVA to 500 KVA including taking down unserviceable one complete all as specified and as directed.

Supply and filling silica gel in existing breather assembly of 50 KVA to 500 KVA capacity transformer complete all as specified and as directed.

Dehydration and filteration of transformer oil from Transformer (s) and Oil Circuit Breaker (s), installed at various Sub Station (s) to achieve di-electric strength not less than 40 KV on 2.5mm over gap for a period of one minute and testing of acidity of oil and dielectric strength (before and after dehydration / filtration) complete all as specified and as directed. Note:- Filteration to be carried out as per IS - 1866. Permissible limit of acidity 0.5mg KOH per gram

Supply and filling up transformer oil as per IS-335 (Grade ‘B’) for topping up in existing transformer and Oil Circuit Breaker, installed at various Sub Station , having Di-electric strength not less than 40 KV on 2.5mm over gap for a period of one minute complete all as specified and as directed. Make : Transoil/Savita/Power oil

Supply and winding of HV/LV coil of 11KV/433 Volt Transformer complete wounded with supper enamel insulated Copper conductor ISI marked of guage as per existing, suitable for transformer of capacity up to 750 KVA complete all as specified and as directed. Note: - cost of taking down burnt out conductor transformer of capacityup to 750 KVA by disconnecting all cable connection and carrying to work shop for repair measured and paid in repsctive item in Shedule above.

S&F in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 20 mm bore complete all as specified and as directed.

S&F in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 25 mm bore complete all as specified and as directed.

M&L for preparation of old rusted of Transformer, denting and painting of capacity of up to 315 KVA any type and applying one coat of primer red-oxide and two coat of synthetic enamel paint (1st grade quality) with the help of spray machine and re-writing Transformer description, MES Number etc complete all as specified and as directed. Note :- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge. The contractor shall apply for shut down of tranformers duly scheduled with all materials and manpower within 48 hours in advance.

S&F cable jointing kit for 11 KV(Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 50 Sq mm to 95 sqmm including taking out old kit complete all as specified and as directed.

S&F cable jointing kit for 11 KV(Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 120 sq mm including taking out old kit complete all as specified and as directed.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor termination heat shrink type joint joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 50 Sq mm to 95 sqmm including taking out old kit complete all as specified and as directed.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor termination heat shrink type joint type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 120 sqmm including taking out old kit complete all as specified and as directed.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 50 Sq mm to 95 sqmm including taking out old kit complete all as specified and as directed.

Dismantling cross arm of MS channel or angle section etc complete and setting aside and remove from site of work complete all as specified and as directed.

M&L for mild steel Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under aluminium coat and one aluminium finishing coat of paint complete for base support frame for water tanks at roof top/ground floor complete all as specified and as directed.

S&F HT Juction Box factory fabricated, CPRI approved made out of CRCA sheet steel , 3.15 mm thick , out door type mounted on angle iron frame of size 50X 50 X 6 mm with cannopy on top spread out 15 cm from top, HT resin cast moulded bushing fitted on 12 mm thick glass fiber inside top plate suitable for 11KV with 3 Nos copper bus bar 400 amp current capacity. The panel shall have two danger notice plates duly rivetted on either sides and two pad locking arrangements to be provided including locks. The busbars shall be seperated with fire retardant seperator. The entire panel shall be duly powder coated and of size not less than .1.0 X1.5X1.0 metre including making all cable connections, nuts bolts made of brass/ HS steel of sutable size and PCC(1:2:4) type B-0 for grouting of Box to be fixed 02 feet height from ground level complete all as specified and as directed. Note : Contractor should submit the detailed drawing for approval from GE before commencement of work

M/S BIJAY KUMAR SHIVA

M/S RATHIN ENTERPRISES