CWE/P-85/2020-21 REPAIR TO VCB PANEL, TRANSFORMERS, VOLTAGE STABLIZERS AND ALLIED WORKS AT UNCHIBASSI UNDER GE (SOUTH) PATHANKOT .

Amount

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking out the transformer/Voltage stabiliser indoor/ outdoor type of capacity 250 KVA to 500 KVA, 11 KV/ 0.433 KV, step down any make for carrying out complete overhauling which shall comprise of the following:-

a) M&L for lifting, transporting, handling, the transformer to workshop and opening top cover of the transformer by unscrewing nuts, bolts, washers etc. including disconnecting core assembly from HT/ LT bushing and lifting the same gently and taking out from the shell (container/ body) of the transformer.

b) M&L for draining out transformer oil from the above said transformer in the suitable capacity of container /drums and keeping it in safe custody for reuse.

c) M&L for cleaning the transformer body from inside, removing deposited dirt/ sludge/ foreign particles etc. from the bottom/ body of the transformer and drying up the shell from inside before refilling of the transformer oil.

d) M&L for cleaning and washing thoroughly core and windings of the transformer by hosing down with clean dry oil conforming to IS 335/1983, removing deposited dirt/sludge/foreign particles from the windings/ core, thorough inspection of windings, providing insulations to leads and terminals, heating/ drying/ baking complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as directed by Engr-in- charge.

e) Lifting and refixing core assembly inside the transformer shell gently and carefully, connecting primary/ secondary/ Neutral connections to the bushings assembly, fixing of tap change over including tightening of nuts, bolts, washers of the core to reduce humming noise all as directed.

f) Refilling the filtered transformer oil in the shell of transformer complete.

g) Refixing the top cover including replacement of cork sheet/ gasket 8mm thick, tightening of nuts/ bolts/ washers etc. and replacement of breather with silica gel crystal type all as directed by Engr-in charge

h) Lifting/ shifting to the place from where removed or to any location as directed and re-installing the transformer including connecting primary/ secondary/ neutral connections etc. all as directed by Engr-in-Charge.

j) The inspection of transformer shall involve:- i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts. Ii) Checking all brazings, joints, tap heads and connection joints. iii) Checking all jumpers, terminations/ connections inside the transformer. iv) Checking the Buchholtz relay/ conservator MOG if any. v) Painting of transformer complete with two coats of synthetic enamel paint externally transformer shell complete all as directed by Engr-in-Charge. (vi) Inspection of tap changer, checking the moving and fixed contacts for contact wear and connection to winding.

k) Conducting the tests on core and windings as per IS like ratio, magnetic imbalance, short circuit etc. in presence of Engr-in-Charge and test results shall be signed both by the contractor and Engineer -in-Charge and kept on record.

Note:- (i) Any damage to insulators/ bushes/ windings etc. while in the custody of the contractor shall be made good at no extra cost to Department. The serviceability of the transformer shall be checked and confirmed by the contractor before taking into his custody. (ii) The quoted rate deemed to be inclusive of provision of alternate stand by transformer of suitable capacity (on rental basis) from workshop till repairs to existing transformer and the cost of rent, transportation to and fro, installation & connection also deemed to be included the quoted rate for the same. (iii) M&L for rewinding/ re-insulation of HT/ LT (primary/ secondary) coils, bushes, studs, Transformer oil,cable box, replacement of buchholtz relay if any etc will be measured and paid separately.

All as per Item No.1.00 to 1.11 herein before but but transformer/Voltage stabiliser indoor/ outdoor type of capacity 100 KVA to 200 KVA

Filtration of transformer oil of transformers/ FRMUs installed at various locations to achieve di-electric strength not less than 60 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as directed by the Engineer-in-Charge.

Supply and topping up of transformer oil with di-electric strength not less than 60 KV in to the conservator tank/ body tank of the transformer/ OCB/ FRMUs etc at various locations complete all as directed by the Engineer-in-Charge.

M&L for rewinding of distribution (HT/LT) transformers of capacity ( 50 KVA to 315 KVA)/ type by winding the defective coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed. [Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

M&L for re-insulating winding of HT/LT distribution transformers of capacity ( 50 KVA to 315 KVA)/ type by winding the defective coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed. [Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

M&L for replacement of silica gel breather assembly for HT/ LT distribution transformers of 250 to 500 KVA capacity including dismantling old one

M&L for replacement of silica gel breather assembly for HT/ LT distribution transformers of 100 to 200 KVA capacity including dismantling old one

M&L for replacement gun metal drain valves of transformers of 250 to 500 KVA capacities including dismantling old one

M&L for replacement gun metal drain valves of transformers of 100 to 200 KVA capacities including dismantling old one

M&L for replacement of the LT porcelain bushings complete of 50 to 500 KVA capacity distribution transformers of existing transformer make/ size/ type all as directed including dismantling old one.

M&L for replacement of the HT porcelain bushings complete of 50 to 500 KVA capacity distribution transformers of existing transformer make/ size/ type all as directed including dismantling old one.

M&L for replacement of the LT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings, bolts, washers, rubber rings etc. complete of following capacity distribution transformers of 250 to 500 KVA any make/ size/ type all as directed including dismantling old one.

All as per item No 13 here in before but of 100 to 200 KVA

M&L for replacement of the HT bushing rod made out of brass with threading & of suitable length/ size all as per existing including metal rings, bolts, washers, rubber rings etc. complete of 50 to 500 KVA capacity distribution transformers of any make/ size/ type all as directed including dismantling old one.

M&L for replacement of (OTI) Oil Temperature indicator of 160 to 500 KVA distribution transformers including dismantling old one.

M&L for porviding new cable box made out of MS sheet of thickness not less than 5 mm including fabrication works, welding etc. to suit the existing transformer size of 200 to 500 KVA, including nuts, bolts, cable glands, termination of existing cables etc., all as directd by the Engineer-in-charge for the following capacity transformers.

All as per item No 17 here in before but of 50 to 160 KVA

M&L for preparation of old painted surfaces of transformers 400 to 500 KVA with coarse cloth/ brush and painting throughout externally on exposed surfaces with two coats of smoke grey colour synthetic enamel paint or as approved colour including writing of transformer details on plinth in white enamel paint on black enamel paint back ground complete including one coat of white wash for base foundation all as specified and directed by Engineer-in-charge for in-door/out-door type transformer.

All as per item No 19 here in before but of 250 to 315 KVA

All as per item No 19 here in before but of 100 to 200 KVA

Clearing of bushes/small plants upto root level around and surroundings areas E/M installations (i.e.Two Pole/ Four structures, outdoor-substation yards & Misc E/M installations etc) including spraying of chemical for anti-vegetation growth as approved, surface dressing n.exc 15 cm deep averaging and removing debris to a distance n.exc 50m complete all as directed

Supply and lay Graded coarse aggregate of size 40 mm dia size in outdoor sub-station yards all as directed

Supply and lay Graded coarse aggregate of size 20 mm dia size in outdoor sub-station yards all as directed

Supply and lay stone dust in layers in outdoor sub-station yard all as directed.

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking out the transformer/Voltage stabiliser indoor/ outdoor type of capacity 50 to 315 KVA, 11 KV/ 0.433 KV, step down , including lifting/ shifting , transporting, handling to the place from where removed or to any location as directed and re-installing the transformer carefully including connecting primary/ secondary/ neutral connections etc. all as directed by Engr-in-Charge.

Material and labour earthing with steel earth plate electrode of size 600x600x6mm thick buried directly in ground to a depth not less than 2.25 mtr deep below normal ground level with top edge of the earth plate not less than 1.5 mtr deep below normal ground level connected to galvanized iron strip of size 32x6mm as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full length of earth plate, GI medium grade pipe 40 mm bore protection pipe upto test point, 20mm dia GI light grade watering pipe with funnel and wire mesh, RCC pit cover of size 300x300x40mm reinforced with XPM having weight not less than 4Kg/sqm including 6mm thick MS bar handle made to shape, PCC pit with 1:3:6 type C1 with angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate, excavation , earth work in any type of soil, removal of excavated soil and returning filling in all as required at site complete all as specified in electrical plate No 3 of SSR Part-I and all as specified or indicated including testing on completion.NOTE :-Rates inclusive of necessary excavation in any type of soil, earth work, PCC pit, RCC cover, funnel with watering pipe, GI earth strip upto 7.5 m long for connecting to test point etc. all as required at site for complete earthing) and dismantling old defective earthpit.

Material and labour earthing with copper plate 600×600 ×3.15mm thick electrode and 20×3mm copper strip as earthing lead, buried directly in ground to a depth not less than 2.25 mtr deep below normal ground level with top edge of the earth plate not less than 1.5 mtr deep below normal ground level connected to20×3mm copper strip as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full length of earth plate, GI medium grade pipe 40 mm bore protection pipe upto test point, 20mm dia GI light grade watering pipe with funnel and wire mesh, RCC pit cover of size 300x300x40mm reinforced with XPM having weight not less than 4Kg/sqm including 6mm thick MS bar handle made to shape, PCC pit with 1:3:6 type C1 with angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate, excavation , earth work in any type of soil, removal of excavated soil and returning filling in all as required at site complete all as specified in electrical plate No 3 of SSR Part-I and all as specified or indicated including testing on completion.NOTE :-Rates inclusive of necessary excavation in any type of soil, earth work, PCC pit, RCC cover, funnel with watering pipe,Copper earth strip upto 7.5 m long for connecting to test point etc. all as required at site for complete earthing) and dismantling old defective earthpit.

Disconnect and taking out the Numeric/ Microprocessor based relay/IDMT relay of any type of any Make from 11 KV HT panel, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment/setting to plug and time multiplier settings of the relay to achieve the descrimination in tripping, tune/synchronise upstream breaker relay settings, re-installation of relay, testing & commissioning etc complete all as specified and as directed. Note: The Contractor has to arrange necessary testing Kits, testing equipments, tools etc and shall also submit detailed test reports, panel wise, duly spiral bound. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & tuning shall be carried out in the presence of representative of the Department, to the satisfaction of the Department. Details of SM/MES/SR Nos of equipments likely to be repaired are enclosed as per Appx 'A1' to particular specifications.

S&F in repair Master Trip Relay suitable for 11 KV HT panel for protection system . Make: Model VAJH23 of schneinder(AREVA)/equivalent of ABB/Siemens/CG

S&F in repair DC Supervision Relay suitable for 11 KV HT panel for protection system . Make: Model VAA11 of schneinder (AREVA)/equivalent of ABB/Siemens/CG

S&F in repair Auxiliary Relay suitable for 11 KV HT panel for protection system. Make: Model VAA33 of schneinder (AREVA)/equivalent of ABB/Siemens/CG

Taking down HT switch gear (Vacuum circuit breaker ) of capacity 11 KV 250/350 MVA comprising of following repairs, overhauling, servicing and refixing the same after repairs/ overhauling: Details of SM/MES/SR Nos of equipments likely to be repaired are enclosed as per Appx 'A1' to particular specifications.

Tripping off the breaker, lowering the breaker with raising/lowering handle and pulling out the breaker complete from the panel along with the trolley for servicing/inspection/overhauling

Servicing/Inspecting/checking of automatic safety shutter operation for serviceability and replacement of spares if required.

Servicing/Inspecting/checking of circuit spout and cicuit spout connections for RYB phases and replacement of spares if required.

Dismantling and checking of cross bar assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly and checking lamination with clamps, epoxy spout, isolator assembly etc.

Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, arcing contacts and chamber baffle pot assembly, moving contact for proper setting of auxiliary contacts operating mechanism.

Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required.

Checking, setting and adjustment of lowering and raising operation of the breaker trolley.

Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear, isolation resistance of trolley of with vacuum interrupter assembly.

The inspection of HT switch gear shall involve:- (i) Inspection of truck & hoist assembly. (ii) Inspection of tank assembly & barriers. (iii) Inspection of assembly & components of solenoid assembly. (iv) Inspection of assembly & components of dependent mechanism. (v) Inspection of assembly & components of spring box mechanism. (vi) Inspection of motor mechanism spring charge assembly (vii) Inspection of assembly of trip unit & related components

Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of VCB panels with approved colour all as per exisitng etc. to put in to the VCBs and panels in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. (ii) Major spares like Breaker bushings, vaccum interrupture assly, busbar spout, busbar spout connections, circuit spout/circuit spout connections/buffer fixed contacts, moving contacts, tank assly/barriers, solenoid spares, dependent/spring mechainsm/ motor mechanism, trip unit etc will be measured and paid separately under relevant items of Schedule 'A'. However the rate quoted shall be deemed to include for any other minor spares require replacement.(iii) the servicing shall be carried out as per norms of OEM (iv) Servicing of VCB/OCB shall be carried out by contractor through the authorized dealer/ rep of the manufacturer. (v) Necessary test certificate of servicing shall be issued by the authorized dealer/ rep with two year guarantee supported by contractor affidavit.

Supply only the following spares suitable for VCBs 250 MVA to 450 MVA and HT panel repair of make: Kirloskar/ABB/Alstom/CG work under relevant Schedule

Supply only 1.5 sqmm FRLS flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

Supply only 2.5 sqmm FRLS flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

Supply only LED Indication Lamps

Supply only LED type push button actuators

Supply only Shunt trip coil 30 V DC/110 V DC

Supply only CTs epoxy cast wound primary CTs with minimum primary current 60 to 400 A, single/ double ratio, double core (Protection core-5P10 & Metering core- Class 0.5/1.0), 18/21/25 KA for 1 sec of 15 VA Burden.

Supply only Breaker control switch

Supply only Breaker bushing contact

Supply only Vacuum interrupter assembly

Supply only Busbar Spout

Supply only Circuit spout

Supply only Control circuit fuses 2 A to 63 A

Supply only HRC fuse (PT HT side)

Supply only PT plug contact

Supply only Spring charging motor with gear assembly. Make: Bosch or as per OEM make

Supply only Ammeter 240 deg 144 Sqmm

Supply onlyVoltmeter 240 deg 144 Sqmm

Supply only Cast Resin Three phase Potentail Transformer 11KV/√3/110V/√3,100VA , Cl 1.0/0.5 with desired capacity PT Fuses

Supply only Rachet handwheel with gear assembly

Dismantling old defective/peeled of Insulating Mat and M/L for Elastomer Insulating Mats for Electrical Purposes Class A/voltage grade upto 3.3 KV (AC) as per IS : 15652:2006 with ISI mark of thickness 2.00 mm+ 10% of approx width 1 mtr along with suitable adhesive /chemibound resin waterproofing compound and sealing material all as per manufacturers' recommendations. Make: Electromat or equivalent approved by GE

Notes : The Schedule of Credit amount shall be deducted from the total of this schedule (BoQ) to arrive at Contract Sum.

SATISH AND CO

satpal and brothers

JAI DURGA CONSTRUCTION CO