REPAIR/MAINT OF TRANSFORMERS AND ALLIED WORKS UNDER AGE E/M UNDER GE SATWARI

Amount

Handling, transportation of unserviceable transformer 11/0.433 KV of capacity 63 KVA to 250 KVA of any make, model & type including disconnection all electric cable, earth lead, clamps and channels etc. & taking down from pole (4 pole structure/2 pole mounted) or plinth mounted by any means of mechanically operated pulley/ mechanical crane, transportation to MES store Yard / workshop and factory for repair/maint with & including transporting back of transformer to existing places to MES store yard or other existing substation after repair & hoisting / lifting and placing in position and securing properly on pole mounted/plinth mounted including connecting all cable, earth lead, clamps and channels etc as per site requirement and testing after installation, complete all as specified and directed by Engineer-in-Charge.

Srl item No 1 Contd … Notes :- (i) Please note that If any damage to transformer/OH line/cables occur during handling, transportation or during hoisting/lifting, the same will be rectified by the contractor without any extra cost to the department. (ii) Transportation to workshop and back to site /any required T&P like hydra/recovery etc. are to be arranged by contractor and rate for which is deemed to be included in the item. (iii) Standby transformer of same capacity will also be provided by the contractor and rate for which is deemed to be included in the item.

Description al as per Ser items No 01 here-in-before but for transformer rating 315 KVA to 630 KVA.

Opening the top cover of transformer step down 11 KV to 0.440 KV, of capacity 50 KVA to 100 KVA of any make, model & type out door/ indoor type, draining out oil in clean barrels, dismantling of cover & taking out the defective/burnt out HT/LT coils cleaning the tank and getting out the dust particles & replacing old defective coils with new coils, refitting the top cover and other accessories such as providing sundry items & reassembling after repairs to the entire satisfaction of the Engineer-in-Charge and heat treatment connecting of all the electrical connections and other accessories and making the transformer absolutely leakproof, pouring oil in the transformer making all electrical connections testing after repair, complete all as specified and directed by Engineer-in-Charge.

Srl item No 4 Contd … Notes:- (i) If retrieved transformer oil's dielectric strength is very less, then it will be replaced with new one as directed by Engineer-iIn-charge and same will be measured & paid under relevant item. (ii) If any items like winding of HT coil, reconditioning of LT coil, spares like breather, silica jel to be replaced for smooth functioning of transformer shall be measured in relevant items. (iii) Any minor item like nut, bolts are included in this item rate.

Description all as per Srl item No. 3 here-in-before but transformer of capacity exceeding 125 KVA and not exceeding 315 KVA.

Description all as per Srl item No. 3 here-in-before but transformer of capacity exceeding 400 KVA and not exceeding 630 KVA.

Winding of HT coils of transformers with super enamelled copper winding wire of appropriate gauge along with allied insulating material of capacity 50 KVA to 630 KVA of transformers, complete all as specified & directed by Engr-in-Charge.

Winding of LT coils of transformer with cotton braided copper wire /strip of appropriate size along with allied insulating materials of capacity 50 KVA to 630 KVA of transformers, complete all as specified and directed by Engineer-in-Charge.

Taking out LV coils from its position for reconditioning by replacing worn out insulation including supplying and providing new insulation, making the LV coils to its original shape and fixing to its position after insulation, testing and commissioning complete all as specified and directed by Engr-in-Charge.

Taking out existing worn out bush rod with accessories and replacement of HT bushes (11 KVA) with rod assembly complete of metallic alloy (brass gun metal) of suitable dia and length including nuts, washers, insulator, packing oil sealing bushes for transformer of capacity 50 KVA to 630 KVA, complete all as specified and directed by Engr-in-Charge.

Taking out existing worn out bush rod with accessories and replacement of LT bush (440 volt) with rod assembly complete of metallic alloy (brass gun metal) of suitable dia and length including nuts, washers, packing oil sealing bushes suitable for transformer of capacity 50 KVA to 100 KVA, complete all as specified and directed by Engr-in-Charge.

Description all as per Srl item No. 10 here-in-before but transformer of capacity 100 KVA and 250 KVA.

Description all as per Srl item No. 10 here-in-before but transformer of capacity 250 KVA and 630 KVA.

Cork sheet gasket (for top cover) of transformers of various capacities including taking out existing perished gasket, complete all as directed by Engr-in-Charge.

Filtration, heating and dehydration of old transformer oil for increasing dielectric strength not less than 45 KV, if the results below 45 KV, the oil shall be replaced with new oil, complete all as directed by Engr-in-Charge. Note :- New oil required for topping oil levels or for replacement maint shall be measured and paid separately.

Supply, heating and filling new transformer oil in transformer for topping up levels or for replacement of unfit oil (New oil shall be confirming to IS-335) dielectric strength not less than 65 KV, complete all as directed by Engr-in-Charge.

Silica gel assembly complete with silica gel in transformer breather of various capacities i.e. 50 KVA to 630 KVA including taking out existing unserviceable, complete all as directed by Engr-in-Charge.

Supply, connecting, commissioning and testing of dial type temperature gauge 110 mm dia temperature range 0-100 degree celsius with thermostat built in switch including taking out existing unserviceable temperature gauge, complete all as directed by Engr-in-Charge.

Supply, connecting, commissioning and testing of new tap changing gear of transformer of any description and including taking out existing unserviceable tap changing , complete all as directed by Engr-in-Charge.

Material and labour for spray painting of transformer with one coat of weatherproof gray synthetic enamel paint (first grade) after removing all dust, rust, carbon and oily spots, including well preparation of surfaces and writing /marking SM/MES No as 25 mm stencil using white paint complete all as specified including cleaning of temperature gauge and silica gel, oil temperature level for transformer rating 50 KVA to 630 KVA complete, all as specified and directed by Engr-in-Charge.

Painting to transformer guard (XPM) fencing, channels, post etc mounted on plinth with one coat of silver aluminium paint, complete, all as specified and directed by Engr-in-Charge.

Material and labour for earthing complete with Galvanized earth plate electrode 600 mm x 600mm x3.15mm thick buried directly in ground ( earth pit not less than 2.25 mtr below normal ground level ) with top edge plate not less than 1.5 metre below normal ground level and covered with alternate compact layer of comen salt and charcol dust, connected to Copper earth strip of size 20x3mm as earthing lead by means of bolts, nuts, chuck nuts and washers of Copper earth lead including PCC pit in PCC 1:2:4 type B-1 RCC cover made out of cement concrete 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) reinforced with TMT steel bars 8 mm dia @150 mm c/c both ways with suitable handle and angle iron 40x40x5mm frame, GI medium grade watering pipe 20mm bore and funnel with wire mesh light grade protection pipe 40mm bore up to main board complete as shown on electrical plate No 3 of MES Sch 2009 (Part-I) and connected to earthing test point all as specified and directed by Engr-in-charge.

Srl item No 21 Contd … Notes :- Cost of following items are deemed to be included in unit rate:- (a) 15 mm nominal bore light grade GI protection pipe 7.5 mtr long for protection of earthing lead from mechanical injury or tempering. (b) Requisite quantity of common salt and charcoal. (c) Testing of earthing. Note: On testing after completion of earthing, if the desired earth resistance is not obtained, the earthing will be re-done by the contractor at his own risk and cost to the entire satisfaction of the Engineer-in-Charge.

Supply and fixing in replacement of Copper Strip of size 20 x 3 mm along the wall, floor, ceiling etc complete, all as specified and directed by Engr-in-Charge.

Plain cement concrete 1:4:8 type D-2 using 40mm graded crushed stone aggregate as in foundation of poles etc complete, all as specified and directed by Engr-in-Charge.

Plain cement concrete 1:2:4 type B-1 using 20mm graded crushed stone aggregate as in coping of poles/ Transformers etc including necessary form work complete, all as specified and directed by Engr-in-Charge.

Servicing of HT 11KV indoor VCB panel and breakers of any make with mechanism comprising the following:- (a) Decarburizing/cleaning complete 11kV HT Bus bar chamber with electrical connections, complete bus bar from the bus bar chamber, Cleaning with CTC and ensure proper decarburizing up to proper megger value, refixing the same after applying Backtol Red solution to the bus bar insulator and checking all the connections, tightening the nuts, bolts complete including replacement of defective rusted bolts and nuts all as specified and directed. (b) Servicing of spring-loaded operating mechanism.

Srl item No 25 Contd … (c) Servicing of spring charging motor. (d) Checking and servicing of gearbox, auxiliary switches, spring, limit switch etc. complete. (e) Checking and repairing electrical and mechanical operations (f) Lubrication of all moving parts with petroleum jelly and cleaning all bushing insulators with CTC (g) Tightening of all mechanical connections of mechanism (h) Proper Tightening all LV connection of VCB. After completion of above items, HT 11 KV supply will be restored as per disconnecting order and testing, complete all as specified and as directed by of Engr-in-Charge.

Collecting necessary required data & peak load details from IED of any type/Make from 11kV HT panel, Transformer/Feeder full load details during peak hours. Relay Setting Calculations & Co-Ordination Study. Unit Protection Setting of Transformers. Feeder wise settings has to be furnished & Report with Firm Recommendations to be submitted, Down Stream Power distribution (Complete 11 KV system) overall co-ordinations of time need to be achieved and disconnecting IED of any type/Make from 11kV HT panel, cleaning the contacts, IED configuration, Calibration & Testing of all the measuring & protection elements at site. Testing of all the trip functions of the relays after final current settings by simulating fault current by CT secondary injection test set, rectification of defects in control wiring for proper tripping of CB during actual system fault conduction through relay & Tripping coil in all as specified and as directed.

Srl item No 26 Contd … Note:- The Contractor has to arrange necessary testing Kit, testing equipments, tools etc. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & tuning shall be carried out onsite with testing equipments in presence of Engr-in-Charge by qualified, Licenced personal and test results shall be signed both by the contractor and Engineer-in-Charge and kept on recording to the satisfaction of the Department.

Material and labour for replacement of unserviceable Spring charging motor for ABB HT 11 KV VCB Panel as per existing make and model all as directed.

Material and labour for replacement of unserviceable Spring charging motor for Areva HT 11 KV VCB Panel as per existing make and model all as directed.

Material and labour for replacement of unserviceable breaker charging spring of ABB HT 11 KV Breaker as per existing make and model all as specified and directed.

Material and labour for replacement of unserviceable breaker charging spring of Areva HT 11 KV Breaker as per existing make and model all as specified and directed.

Material and labour for replacement of unserviceable master trip relay complete, all as specified and directed by Engr-in-Charge.

Material and labour for replacement of unserviceable over current and earth fault relay complete, all as specified and directed by Engr-in-Charge.

Material and labour for replacement of unserviceable ABB coil Art complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of handle unigear of HT VCB Panels complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of main door locking handle of HT VCB Panels complete, all as specified and directed by Engr-in-Charge.

Material and labour for replacement of unserviceable Auxiliary contactor complete, all as specified and directed by Engr-in-Charge.

Material and labour for replacement of unserviceable LED Indication Lamps complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of outdoor type cable end termination jointing kit heat shrinkable complete with all accessories and jointing materials suitable mounting on channel/angle iron for 3 core 240 Sqmm XLPE HT cable complete, all as specified and directed by Engr-in-Charge. Note:- kit shall be not older than 3 months from the date of manufacture.

Supply and fixing in replacement of Digital Ammeter of CT Ratio 300/150/5 Amps complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of Digital Ammeter of CT Ratio 150/75/5 Amps complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of Digital Voltmeter of PT Ratio 11000/110 Volts complete, all as specified and directed by Engr-in-Charge.

M/S RAJ ENGINEERS

BMMJ TRADERS AND ENGINEERS

ANIKET TRADERS

M/S S K Electricals Regd

M/S SHREE KRISHANA ENERPRISES