REPAIR/ REPLACEMENT AND TESTING OF SWITCHGEAR AND OTHER CONNECTED EQUIPMENTS OF 132 KV AT MAIN RECEIVING STATION UNDER GE (U) BATHINDA AT BATHINDA MIL STN

Amount

S&F in replacement of Bus Isolator with solid core insulators with earthing rod arrangement suitable for 132 KV main line earthing purpose including necessary nut bolt, clamp complete all as specified and directed. Make- LAMCO/OBLUM/CG POWER/BHEL

S&F in replacement of 132/145 KV Bus post Insulator as per existing Make and model complete with accessories all as specified and directed. Make- LAMCO/OBLUM/CG POWER/BHEL

S&F in replacement of 132/145KV Class line CT oil immersed, self cooled, hermetically sealed, outdoor type, single phase, multi ratio, multi core, with first filling of oil and with terminal connectors, without supporting structure complete of ratio 100-200/1-1-1-1A with insulation level 275/650 KV incl all control connection complete fitting with accessories all as specified and directed. Make- GE/CG POWER/BHEL

S&F in replacement of 132/145KV Class, PT, oil immersed, self cooled, hermetically sealed, outdoor type, single phase, multi ratio, multi core, with first filling of oil and with terminal connectors, without supporting structure complete of ratio (132/ √3 KV) / (110/ √3 V) marking on primary winding 1a-1n and on secondary winding 2a-2n with insulation level 275/650 KV with control connection complete all as specified and directed. Make- GE/CG POWER/BHEL

S&F in replacement of 132/145KV Class transformer CT oil immersed, self cooled, hermetically sealed, outdoor type, single phase, multi ratio, multi core, with first filling of oil and with terminal connectors, without supporting structure complete of ratio 75-150/ 0.577-1-1-1-1A with insulation level 275/650 KV with control connection complete all as specified and directed. Make- GE/CG POWER/BHEL

Supply and fixing in replacement of Gasket 3 mm thick for power transformer of capacity 12.5 MVA complete set of Tfr all as specified and directed.

Cleaning and preparation of old painted surface of yard gantery and structure at 132 KV MRS and painting with spray machine one coat as per existing colour paint as directed and specified.

Dehydration & filtration of transformer oil with portable filtration cum dehydration machine to improve the dielectric strength not less than 45 KV with in 1 minute with 2.5 mm Gap at site of at installation in cantt area 132KV MRS, plinth mounted. Oil filtration in storage tank to be continued in parallel. Filling of the filtered oil with required BDV in main tank under vacuum.Testing of dielectric strength of dehydrated transformer oil of each transformer will be carried out in the presence of Eng-in-Charge. Note :- (i) Contractor shall ensure no wastage of transformer oil.

Supplying & filling for top up new mineral grade transformer oil EHV type confirming to IS-3357 of 1983 in power transformer with high dielectric strength not less than 60 KV (Gap 2.5mm) complete all as specified and directed. Note:- (i) Empty barrel will be property of contractor and same will be returned to contractor when barrel will be empty.

Calibration and testing of C & R panel of Power Transformer 03 Nos incl I/C & O/G VCB's carried out by OEM or PSPCL certified authorized agency as specified and directed. Note (i) The testing certificate with documents shall be submitted to Engr-In- Charge. (ii) Test certificate to be submited by the contractor before payment of bill.

S&F in replacement of 11 KV Disk insulator all as specified and directed.

S&F in replacement of 0.4 Sq inch ACSR Panther conductor with clamps, nut, bolts, washers as required complete all as specified.

Supply and refilling of SF6 Gas in SF6 breaker as specified.

Servicing, cleaning & Overhauling of 12.5MVA Transformer at 132 KV MRS, Obtaining of dead shutdown permit and checking of the fllowings:- (i) Removal of HV & LV connections after disconnection of bus duct from transformer. (ii) Joint pre-gasket replacement checking for oil leakage points, condition of transformer complete. (iii) Draining out of oil from transformer main tank and keep in seprate storage tank after checking, cleaning and removal of all dust particle, refilling the same without wastage of Oil. Note:- Recycling items considered seprate and paid in respective schedule. (iv) Dismantling of cooling bank assembly, top & bottom cooling pipelines, radiators with headers & conservator and erection with new gasket after checking, cleaning & removal all unwanded particles. (v) Dismantling of HV, LV & neutral bushings with turrets. OLTC Inspection and tightening of the contacts of tap changer after opening the Top cover re-erection of HV, LV & neutral bushings & turrets with new erection gaskets. (vi) Dry out of transformer with cycles comprising of dry air purging and vacuum pulling to be carried out till satisfactory dryness/dew point is achieved. (vii) Final vacuum pulling to be started in main tank & to be continued for 24 hours at full vacuum. (viii) Oil circulation in main tank to be continued till satisfactory oil BDV is achieved.

(... Contd/-.....) (ix) Opening of all the valves of the cooling bank & main conservator. (x) Air release from all the required points in the transformer to be done. (xi) Testing of the transformer jointly with customer as per testing scope below. Testing of Transformer carried out in presence of GE/Engr-in-charge. A. Testing Before Overhauling work: Low voltage testing, (i) Tan delta and capacitance of bushings and windings Insulation resistance & Polarization index &Oil BDV (On Site) B. Testing After Overhauling: Low Voltage Test . (i) Insulation resistance & Polarization index. (ii) Tan Delta & Capacitance of bushing & windings. (iii) Oil BDV, Water Content Trans Power Scope: (iv) Skilled and Semi Skilled Manpower with WC Policy, PF, ESIC, PPE and T&P's, Testing of Transformer, Required Gaskets, Oil Seal, O-Ring 4KL Filter Machine with Vacuum Pump, Hydra & Storage Tank and Complete spray painting of power transformer complete. Note for ser item No. 14 & 15:- The above servicing & comprehensive maint to be carried out from authorized power transformer service provider as approved by GE in writing.

S &F in repair/Replacement of 132 KV, 65KA lightning arrestor, 9 Insulator complete all as specified and directed.

S & filling in replacement of new silica gel complete all as specified and directed .

Supply and fixing in replacement Closing coil 220/110 volts DC complete all as specified and directed. Make- ABB/SIEMENS/ SCHNIEDER /C&S.

Supply and fixing in replacement tripping coil 220/110 volts DC complete all as specified and directed. Make- ABB/SIEMENS/ SCHNIEDER /C&S.

Supply and fixing in replacement remote local switch for 132/11 KV power transformer complete all as specified and directed. Make- ABB/SIEMENS/ SCHNIEDER /C&S.

Supply and fixing in replacement tripping bell/Not trip Bell/ DC fail Bell at main panel of power transformer complete all as specified and directed. Make- ABB/SIEMENS/ SCHNIEDER /C&S.

Supply, installation, testing & commissioning in replacement of old earthing to maintenance free Earth (grounding) electrode of size 85 mm Dia x 03 Meter long with 17.2 mm Copper bonded MS conductor in high purity electrically conductive granular material having ultra low resistive value of 0/001 Ohm-meter. Electrode made of conductive earth enhancing material mixed with Cement in the ration 3:1 backfill the voids surrouding the 17.2 mm copper bonded MS conductor or other metal comonents placed in augured bore hole of of 100mm diax 3 meter depth, resulting to increase in the effective surface area of the earth electrode or grids to lower the resistance. Earth enhencing material should not leach chemical into the adjacent soil or underground water channels and should be in pH neutral range.Earth enhancing material should permamanently protect the encased metal components of the earthing system, coppe bonding on MS rod should be minimum 250 microns. All hardware like nuts, bolts and washers sould be of stailess steel. Electrode should withstand fault current upto 35 KA for 1 second. Electrode's top terminal be sealed permanently packed with conductive concrete and copper bonded copper strip taken out be terminated on to earth test point and equipment terminal. Test certificate of NABL Laboratory shall be submitted by the contractor, test link of size 50mmx6mmx200mm, RCC pit cover test point complete, all as specified and directed. Make:- Elancrete/ ABB/ L&T/ Schneider Note:- I) Test certificate of earthing material from certified NABL laboratory shall be subm,itted & verified by GE. II) Test Reports should not be more han 07 years old. III) Test Report for Fault current, Rohs compliance, Resistivity value from NABL certified/ CPRI LAB is most and it as to be vrified by Engr-in-Charge or GE

M&L chemical earthing complete with copper electrode earth plates 900x600x5mm thick burried directly in ground earth pit not less than 5.0 mtr deep below ground level with top edge of earth plate not less than 4.25 mtrs below normal ground level with a bottom layer MG SO4 of 10 cm thick, earth plate surrounded graphite powder , vegetable soil mixture, with adequate quantity of charcoal dust mixed with salts equal proportion around to a packet thickness of 15 cm all around and above the plate and 10 cms thick MG SO4 as top layer and the remaining portion filled with excavated earth and connected with copper strip 32x6mm duly breased upto 7.5 meter length and connected to earthing test point, GI pipe light grade 40mm bore for watering with as directed GI pipe light grade 50mm bore for strip protection pipe from earth chamber to copper edge of earth plate, CI funnel with wiremesh fixed on water pipe and PCC 1:2:4 type B-1 using 20mm graded stone aggregate as in pit chamber and RCC pitcover 50mm thick pre-cost RCC 1:2:4 type B-1 dully rainforced with MS bars 6mm dia @150 cc both ways with 10mm dia MS bar in lifting handle excavation earth work including laying of GI pipe in walls etcall as directed in electrical plate No 3 of SSR pt I complete all as specified and directed. Note: (i) Earth test result not less than 1 Ohm. (ii) Additional chemical compound is deemed to be incl in the above item, no extra payment will be made on this account to acchive earth.

M/s Rohit Construction Co.

R D Bansal