CWEK-53/2022-23

Amount

Repair/maintenance and servicing of step down transformer 11 KV/433 Volt of capacities 100 to 250 KVA, of any make, Installed at different locations of AOR comprising following work services :- (a) Disconnection carefully of cable end termination of HT & LT side. (b) Opening of top cover by removing nuts, bolts and all mounting accessories and conservator tanks. (c) Draining out transformer oil and keeping aside in barrel for re-use and then again pouring back after necessary filteration and dehydration including top up with new transformer oil to make up the reduced quantity. (d) Replacement of top gaskets. (e) Servicing of tap changing gears by cleaning and polishing tapping contact points. (f) Labour only for cleaning of bush and stud both HT/LT side and refixing the same with new cock sheet as required. (g) Replacing unserviceable stud and bush as required as directed by engineer-in-Charge. (h) Reconnection of all cable terminals HV & LV sides and refixing the top cover after replacement of gaskets, conservator tank in position. (j) Cleaning and heating of silica gel in breather and replacing with new silica gel to make up the reduced quantity. (k) Connecting HT & LT side with existing incoming and outgoing cables including reconnection of earth strip/lead. (l) Provision of a functional transformer of same or higher capacity while the transformer is taken for repair. (m) Any transportation of the transformer to and from the location of installation to the contractors workshop, including installation back as specified by engineer in charge. Note : (i) Spare parts not mentioned above (if required) will be measured and paid separately. (ii) New transformer oil (if required for topping up) will be measured and paid separately. (iii) De-hydration of existing transformer oil for refilling will be measured and paid separately. (iv) The transformers have to be taken for repair and a replacement transformer of same or higher capacity to be placed within 48 hrs from intimation in phone/ through whatsapp, irrespective of any weather issues. For this purpose, the contractor has to submit a functional phone and whatsapp number that is not to be switched off at any time. Any delay beyond this time will be fined at the rate of Rs. 1000 per day per transformer

All as per item No 01 here-in -before but for 33kV /11 kV & 11 KV/433 Volts transformer of capacities 63 to 160 KVA.

All as per item No 01 here-in -before but for 33kV /11 kV transformer of capacities 1600 KVA (Replacement Transformer not required for upto 168 hours (7 days) All other description is same as in item No 01 Note No (iv)

Supply and fixing bushing and stud complete with porcelain insulators and gasket complete for LT side (as per existing size/Model) of Transformer complete all as specified and directed.

Supply and fixing bushing and stud complete with porcelain insulator and gasket complete for HT side (as per existng size/Model) of transformer complete all as specified and directed.

Replacement of burnt/ unserviceable defective HT/ LT copper coil of transformers, AVRs and Servo Voltage Stabilisers with new one made out of suitable size/ guage of copper super enameled wire of high quality matching with the existing impendence and insulated all as specified and directed by engineer-in-Charge. Note :- (a) The cost of coil shall be inclusive of cost of varnish, insulating paper and other insulating materials and no extra payment will be made for the same. (b) The cost is inclusive of disconnecting of all electrical connections and transportation of transformer from site to reputed repair workshop and back including reinstalling & reconnecting electrical connection and no extra payment will be made for the same. (c) Standby transformer/ stabiliser/ AVR will be arranged by contractor at his own cost to avoid failure of supply on site and the capacity of transformer should be matched with repaired transformer. This standby transformer will be brought within 48 hours of intimation (either by phone or by whatsapp) of unserviceability of the original transformer (for this purpose, the contractor has to provide a whatsapp number that is always functional).

Dehydration and filtration of transformer oil of transformer / Servo voltage stablizer/ AVR installed at site with portable plant to improve the dielectric strength to 50 KV during filling after initial filtration including testing of dielectric strength after dehydration at site complete all as specified and directed. Note : Any damage to transformer/ stabiliser/ AVR caused during oil dehydration and filteration will be rectified by the contractor free of charge.

Supply only for transformer oil having minimum dielectric strength of 60 KV, supplied in termetically sealed steel barrels, confirming to IS-335, all as directed at site by engineer-in Charge (Part of this Transformer oil may be required to be filled in Transformers, which is included in this schedule)

Painting of transformers/ stabilisers/ AVRs/ VCB panel set/ OCB Panel Set of any capacity after cleaning the body surface of transformer by rubbing with emery Paper and acetone to remove oil stains, dust etc and applying one coat of snthetic enamel paint (colour to be decided by MES) by spray painting including writing SM No/MES No, capacity of transformer, OCB panel all as directed by Engineer-in-Charge.

Dismantling the voltage stabilizers/ AVRs (any type) by taking out transformer oil and storing for reuse (after cleaning, filtering and removing moisture from it) and repairing / replacing the unserviceable parts, reassembling it after repair testing and commissioning the voltage stablizer of capacity 50 to 400 KVA unbalanced type Installed at different location of AOR (spares to be measured and paid separately under relevant item of this schedule). Note : The Stabilisers/ AVR have to be taken for repair and a replacement Stabiliser/ AVR of same/ higher capacity to be placed within 168 hrs (seven days) from intimation in phone/ through whatsapp, irrespective of any weather issues. For this purpose, the contractor has to submit a functional phone and whatsapp number that is not to be switched off at any time. Any delay beyond this time will be fined at the rate of Rs. 1000 per day per stabiliser/ AVR

Supply and fixing (in replacement) servo motor of 3 Kg torque capacity/rating complete for voltage correction having speed of correction 8 volt per second complete all as specified and directed. Make :- AE/ Paradise/ Voltamp Note : This item may also be taken as a supply only item if desired by Engineer in Charge

Supply and fixing (in replacement) servo motor of 10 Kg torque capacity/rating complete for voltage correction having speed of correction 8 volt per second complete all as specified and directed. Make :- AE/ Paradise/ Voltamp Note : This item may also be taken as a supply only item if desired by Engineer in Charge

Supply and fixing (in replacement) Dimmerstat for unbalanced servo stabilizer all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) RC network for 10 Kg servo motor part/circuit for (any type of) voltage stabilizers If suitable RC network is not available in the market, then necessary modifications to the voltage stabiliser is also included all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) RC network for 3 Kg servo motor part/circuit for (any type of) voltage stabilizers If suitable RC network is not available in the market, then necessary modifications to the voltage stabiliser is also included all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) PCB Holder for unbalanced type voltage stablizer all as specified and directed by engineer-in-charge. Note : If compatible PCB holder is not obtained by the contractor, then all suitable modifications (to the stabiliser to fit a PCB holder available with the contractor) with labour and material are also included

Supply and fixing (in replacement) Push button for voltage stablizer all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) Auto manual switch for voltage stablizer all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) Rotary switch for RYB phases of voltage stabilizer all as specified and directed by engineer-in-charge.

Supply and fixing (in replacement) carbon bush of voltage stabilizer at site of any capacity all as specified and directed by engineer-in-charge.

Supply and fixing PCB /control card of (any type of) voltage stabilizer of capacity 50 KVA to 400 KVA for unbalanced type voltage stablizer If suitable control card/ PCB is not available in the market, then necessary modifications to the voltage stabiliser is also included all as specified and directed by engineer-in-charge.

Supply and fixing Replacement of bushing assembly including brass nut, stud, washer and insulator suitable for voltage stabilizers/ AVR all as specified and directed by engineer-in-charge.

Supply and fixing digital three phase Voltmeter - 0-500 Volt range square shape 96mm all as specified and directed by engineer-in-charge. Note : This item may also be taken as a supply only item if desired by Engineer in Charge

Supply and fixing digitial three phase Ammeter - 0-500 Ampere range square shape 96mm, with necessary CTs all as specified and directed by engineer-in-charge. Note : This item may also be taken as a supply only item if desired by Engineer in Charge

Material and Labour for replacement of Control Wiring complete with suitable copper wire of required size or as per sample/directed including accessories for voltage stabilizer (of any type) of capacity 200-400 KVA. If suitable control wiring is not available in the market, then necessary modifications to the voltage stabiliser is also included all as specified and directed by engineer-in-charge.

Material and Labour for replacement of Control Wiring complete with suitable copper wire of required size or as per sample/directed including accessories for voltage stabilizer (of any type) of capacity 50-250 KVA. If suitable control wiring is not available in the market, then necessary modifications to the voltage stabiliser is also included all as specified and directed by engineer-in-charge.

Taking out old unserviceable burn out core lamination from transformer S & F new core lamination as per IS complete all as specified and directed.

Taking out old unserviceable gasket of transformer and supply and fixing rubber gasket of suitable size complete all as specified and directed.

Taking out old unserviceable off/on load tap changer from 11/0.415/0.433 KV Tansformer & Supply and fix new off load tap changer suitable for 11/0.415/0.433 KV Transformer complete all as specified and directed.

Supply and fix in replacement oil level indicator for transformer of cap up to 400 KV all as per exixting and having level marking 1/4,1/2,3/4 and full all as directed by engineer-in-charge or required at site.

Taking down old Unconditional breather assembly and model and capacity Supply and fix in replacement new breather assembly suitable for transformer of capacity up to 400 KVA all as per existing all as directed by enginner-in-charge or required at site.

Supply and installation 11 KV air break gang operated triple pole out door type gang operated air break switch mechanically opetrated, mounted on insulator and steel frame with operating mechanism worked from ground level with 09 Nos insulators outdoor type triple pole suitable for horizontal /vertical installation provided with locking arrangment consisting of MS channel HT post type insulator high pressure heavy lined copper alloy contact assembly suitable for 200 Amp including operating rod 20mm dia GI medium grade pipe complete all as specified and directed.

Supply and fix drop out fuse unit suitable for 11 KV 200 Amp mounted on 06 insulators with drop out fuse unit swing out expulsion fuse single pole,for 11000 Volts grade complete all as specified and directed

M & L for 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 Armoured aluminium conductor cable of size 50 Sqmm to 95 Sqmm complete all as specified and directed.

M & L for 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 50 Sqmm to 95 Sqmm complete all as specified and directed.

Disconnect old unserviceable battery any size and model supply and fixing new battery of 180 AH,25 plate with initial charger specific gravity 12.60 of 12 volts complete all as specified and directed by Engineer-in-charge Make: Exide / Amron/ Luminous

Supply and fixing Panel Lamp for balanced/unbalanced type voltage stablizer all as specified and directed by engineer-in-charge.

M & L for Earthing complete with galvanised steel earth plate electrode 60x60cmx 6.3mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to galvanised iron strip 32x6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel including PCC (concrete chamber) shall be PCC 1:3:6 type C-1 using 20mm graded stone aggregate,with fair finish internal surface of concrete chamber shall be given 15mm thick plaster in CM 1:4,funnel with wire gauge of (0.68) 8 mesh per liner inch,80mm thick RCC pit cover 320 mmx320 mm of RCC 1:2:4 type B-1 using 20 mm graded stone aggregate reinforced with XPM,JALLI and charcoal dust and common salt all as shown in electrical plate No.5 of MES SSR Part-1 and specified including provision of earth wire protected by 40 mm dia medium grade GI pipe and watering pipe shall be 20 mm bore medium graded GI pipe,and including all excavation and earth work & connecting the earthing to an earthing test point /transformer neutral/body/LT panel etc.and testing on completeion complete all as spec ified and directed. NOTE: The quoted rate of earthing shall be deemed to included cost of 7.5m long galvanised earth strip 32x6 mm and protection pipe of 40 mm bore medium graded ,GI light graded 20mm bore watering pipe

M/s Habib Electronics

M/S Sky Engineers