REPAIR AND MAINTENANCE OF 33 KV CIRCUIT BREAKER YARD MAINTENANCE AND TRANSFORMER REPAIR AND CONNECTED ITEMS OF KHYBER GRID AND REPAIR MAINT TO 11 KV HT CABLE OF CARIAPPA PARADE GROUND AGE U ELECT SUPPLY NO II, UNDER GE U ELECT SUPPLY, DELHI CANTT10

Amount

Material & labour for repair /overhauling of OLTC ( On load tap changer ) of 33KV/11KV Power transformer of capacities 16/20 MVA at site by carried out following work of BBL make :- (a) Opening of top plate of OLTC. (b) Draining out of transformers oil from the OLTC. (c) Stoping of leakage of oil from main shaft of OLTC including replacement of oil seal and all gasket of OLTC. (d) Checking /servicing of moving and fixed contact of OLTC and resistence test of contact. (e) Flushing of OLTC assembly with hot new oil and removing of sludge. (f) Filling of new transformer oil in OLTC . (g) Tightening of all tapping leads and connections. (h) Refixing of top plate of OLTC in original position after overhauling. (i) Electrical testing of manual/auto operation of OLTC. Note :- Transformer oil as required shall be measured and paid separately under item No 70 here-in -before as supply only.

Material & labour for repair /overhauling of OLTC ( On load tap changer )/diverter switch of 33KV/11KV Power transformer of capacities 12/16 MVA at site by carried out following work of NGEF make :- (a) Opening of top plate of OLTC. (b) Draining out of transformers oil from the OLTC. (c) Stoping of leakage of oil from main shaft of OLTC including replacement of oil seal and all gasket of OLTC. (d) Checking /servicing of moving and fixed contact of OLTC and resistence test of contact. (e) Flushing of OLTC assembly with hot new oil and removing of sludge. (f) Filling of new transformer oil in OLTC . (g) Tightening of all tapping leads and connections. (h) Refixing of top plate of OLTC in original position after overhauling. (i) Electrical testing of manual/auto operation of OLTC. Note :- Transformer oil as required shall be measured and paid separately under item No 70 here-in -before as supply only.

Material and labour for servicing /testing of line circuit breaker, control panel including outdoor CT, PT and relays in control panel of outdoor SF 6 Gas Circuit Breaker of capacity 1250/800 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Checking of Closing/Tripping coil assembly (ii) Adjustment of mechanism if required. (iii) Clean the circuit breaker to remove dust and dirt. (iv) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (v) Check for rust and wear. (vi) Checking of spring charge mechanism (vii) Visual check for rust and deformation. (viii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (ix) Check for loosened connections, rust, damaged lead wires. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Replacement of Dashpot/shock absorbers . (xiii) Replacement of carbon brush of spring charging motor (xiv) Cleaning of porcelain bushing (xv) Checking of limit switch

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay (ii) Line diffrential relay (d) Testing of followig Aux relay:- (i) DC Supply supervision relay. (ii) Trip Circuit suprvision relay (ii) SF 6 gas pressure low. (iii) PT Fuse failure relay (iv) Master trip relay (v) Under voltage relay (vi) Over voltage relay

Material and labour for servicing /testing of transformer circuit breaker, control panel including outdoor CT, PT and relays in control panel of outdoor SF 6 Gas Circuit Breaker of capacity 1250/800 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Checking of Closing/Tripping coil assembly (ii) Adjustment of mechanism if required. (iii) Clean the circuit breaker to remove dust and dirt. (iv) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (v) Check for rust and wear. (vi) Checking of spring charge mechanism (vii) Visual check for rust and deformation. (viii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (ix) Check for loosened connections, rust, damaged lead wires. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Replacement of Dashpot/shock absorbers . (xiii) Replacement of carbon brush of spring charging motor (xiv) Cleaning of porcelain bushing (xv) Checking of limit switch

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance.

(c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault Relay (ii) Transformer diffrential relay (d) Testing of followig Aux relay (i) DC supply supervision relay. (ii) CB SF 6 gas pressure low. (iii) Master trip relay (iv) Main Buchholz trip (v) Buchholz OLTC Trip (vi) SPR & PRV trip. (vii) Winding temp high trip (viii) Oil temp high trip. (ix) Main Buchholz alarm (x) Winding temp High alarm (xi) Low Oil level alarm (xii) Oil temp high alarm

Material and labour for servicing /testing of line breaker/control panel including outdoor CT, PT and relays in control panel of outdoor VCB of capacity 1250 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Checking of Closing/Tripping coil assembly (ii) Adjustment of mechanism if required. (iii) Clean the circuit breaker to remove dust and dirt. The envelope of the vacuum interrupter and insulating materials shall be wiped with a clean cloth. (iv) Checking the contact for wear. Replace if the contact piece has worn out. (v) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (vi) Check for rust and wear. (vii) Checking of spring charge mechanism (viii) Visual check for rust and deformation. (ix) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (x) Check for loosened connections, rust, damaged lead wires. (xi) Checking of control circuit & tighten the connections if any. (xii) Check close & trip coil. (xiii) Replacement of Dashpot/shock absorbers . (xiv) Replacement of carbon brush of spring charging motor (xv)Cleaning of porcelain bushing (xvi)Checking of limit switch

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Testing VCB bottle (vi) Closing coil resistance (vii) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault Relay (ii) Transformer diffrential relay (d) Testing of followig Aux relay (i) DC supply supervision relay. (ii) CB SF 6 gas pressure low. (iii) Master trip relay (iv) Main Buchholz trip (v) Buchholz OLTC Trip (vi) SPR & PRV trip. (vii) Winding temp high trip (viii) Oil temp high trip. (ix) Main Buchholz alarm (x) Winding temp High alarm (xi) Low Oil level alarm (xii) Oil temp high alarm

Material and labour for servicing /testing of transformer breaker/control panel including outdoor CT, PT and relays in control panel of outdoor MOCB of capacity 1250 Amps and rating 33 KV complete as details mentioned as under:- (a) Details of servicing of breker :- (i) Checking of oil level in each pole (ii) Checking of visible oil leaks (iii) Cleaning of porcelain bushings (iv) Checking of oil leakage from oil dash pot in operating mechanism (v) Checking of contact burning (vi) Cleaning and lubricating (vii) Checking/tightening of all electrical terminals and earth terminals and earth connections. (viii) Checking of auxiliary switch (ix) Checking of limit switches and friction clutch. (x) Checking of closing/tripping coils (xi) Checking of spring chargingmechanism (xii) Adjustment of mechanism if required. (xiii) Check for rust and wear. (xiv) Visual check for rust and deformation. (xv) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (xvi) Check for loosened connections, rust, damaged lead wires. (xvii) Checking of control circuit & tighten the connections if any. (xviii) Replacement of Dashpot/shock absorbers . (xix) Replacement of carbon brush of spring charging motor

(b) The following test shall be carried out:- (i) Primary Injection Test of outdoor CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay (ii) Line diffrential relay (d) Testing of followig Aux relay (i) DC supply supervision relay. (ii) CB SF 6 gas pressure low. (iii) Master trip relay (iv) Main Buchholz trip (v) Buchholz OLTC Trip (vi) SPR & PRV trip. (vii) Winding temp high trip (viii) Oil temp high trip. (ix) Main Buchholz alarm (x) Winding temp High alarm (xi) Low Oil level alarm (xii) Oil temp high alarm

Material and labour for epoxy coating on CT, PT, insulators in 11 KV VCB panels complete all as directed by Engr-in-charge

Material and labour for servicing /testing of breaker/control panel including CT, PT and relays in control panel of VCB of capacity 2000 /800/630 Amps and rating 11 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Adjustment of mechanism if required. (ii) Clean the circuit breaker to remove dust and dirt. The envelope of the vacuum interrupter and insulating materials shall be wiped with a clean cloth. (iii) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (iv) Check for rust and wear. (v) Check Spring Tension and pitting of the Cluster Contacts. (vi) Visual check for rust and deformation. (vii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (viii) Check for loosened connections, rust, damaged lead wires. (ix) Check whether the contacts are damaged by arcing. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Checking of Jaw Contacts Conditions and repair/adjust. (xiii) Replace the jaw contacts,If required. (xiv) Improvement of resistance of epoxy insulator and epoxy body by applying post heated varnish. (xv) Replacement of Dashpot/shock absorbers . (xvi) Replacement of carbon brush of spring charging motor

(b) The following test shall be carried out:- (i) Primary Injection Test of CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay (d) Testing of followig Aux relay (i) DC Supply supervision relay. (ii) Master trip relay

S&F in replacement of closing coil assembly 50 volts DC of existing make for SF 6 breaker of capacity 1250 amps of rating 36 KV including taking down of UNSV coil complete all as specified and directed

S&F in replacement of tripping coil assembly 50 volts DC of existing make for SF 6 breaker of capacity 1250 amps of rating 36 KV including taking down of UNSV coil complete all as specified and directed

S&F in replacement of closing coil assembly 50 volts DC of existing make for VCB of capacity 1250 amps of rating 36 KV including taking down of UNSV coil complete all as specified and directed

S&F in replacement of tripping coil assembly 50 volts DC of existing make for VCB of capacity 1250 amps of rating 36 KV including taking down of UNSV coil complete all as specified and directed

Material & labour for repair /servicing of marshalling box panel of 33KV/11KV Power transformer of capacities 16 / 20 MVA including follwing :- (a) Testing & repair to control wiring. (b) Testing of OTI, WTI gauge/ meter matching with OTI, WTI indicator in RTCC panel. (c) Testing of fuse/ MCB (d) Repalacement of gaskets & locks including preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of etc complete all as specified and directeed.

Material & labour for repair /servicing of marshalling box panel of 33KV/11KV Power transformer of capacities 12 / 16 MVA including follwing :- (a) Testing & repair to control wiring. (b) Testing of OTI, WTI gauge/ meter matching with OTI, WTI indicator in RTCC panel. (c) Testing of fuse/ MCB (d) Repalacement of gaskets & locks including preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of etc complete all as specified and directeed.

Material and labour for Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of 33 KV outdoor brakers with spraying machine including writing description of equipment in block English letter 50 mm high with white /black synthetic enamel paint complete all as directed by Engr -in-Charge.

Material and labour for Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of Terminal Kiosk (TK) at 33 KV Yard with spraying machine including writing description of equipment in block English letter 25 mm high with white /black synthetic enamel paint complete all as directed by Engr -in-Charge.

Material and labour for Preparation of old painted surfaces of 33 KV Switch yard including all outer steel structures/ frame/gate of bus bay at Grid, having dimensions 54 m x 11.5m x 9.5m and steel housing of capacitor bank having dimension 6m x 4.4m x 4m (incluiding top closed) by brushing/cleaning stains, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) with spraying machine in the yard including writing description of equipments in block English letters 100 mm high with white/black synthetic enamel paint complete all as specified and directed.

Disconnecting power supply, Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of spray painting (synthetic enamel paint) on all sides of 33 KV 16/20 MVA transformer and its accessories with spraying machine in the yard including writing description of equipment in block English letter 50 mm high with white/Black synthetic enamel paint and re-connection after painting complete all as specified and directed.

All as per item No 18 here-in -before but capacity of power transformer 12/16 MVA.

Material & labour for cleaning of the bay/yard (82.5 RM x 26.5 RM) manually without damaging any equipments, cable or parts of the 33 KV Grid bays, removing of dusts/grass/hurbs etc all as directed by Engr -in-charge.

Material and labour for sprading of stone aggregate of nominal size not more than 40mm from the bay/yard manually without damaging any equipments, cable or parts of the 33 KV Grid bays, spreading & levelling of finished gravel uniformaly in layers n. exc. 15 cm thick watered and rammed to true surface all as specified and directed

M & L for cutting and removing grass, vegetation bushes etc from inside boundary wall and outsite boundary wall of 33/11 KV Sub Stn, around 33 KV towers and removing all rubbish to a distance not exceeding 50 m as directed.

M&L for Servicing & Repairs to Air-break switch (isolator) off load, rotating type, 33 KV, 800 Amps to 1250 Amps capacity, with proper alignment of isolator rotating blades, with fixed contact jaws, arcing horns, applying petrolium jelly to moving mechanism, cleaning and lubricating to isolator gear box assembly, tightening all nuts, bolts and clamps of jumpers etc, repairing to isolator gear box assembly and making in proper serviceable condition for smooth functioning, testing and commissioning on load complete all as specified and directed.

Supplying and Fixing in repairs, male/moving contact/ rotating blade of HDE copper silver plated of Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity with all fixing nuts, bolts etc complete all as specified and directed.

Supplying and Fixing in repairs, Fixed Contacts, made of HDE copper, silver plated, of Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity with all fixing nuts, bolts etc. complete all as specified and directed.

Supplying and fixing of terminal pad for Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity

Supplying and fixing of arching horn for Air Brake, off load isolator switch, rotating type, 33 KV, 1250/800 Amps capacity

Supply , installation, testing and commissioning in replacement of air bake off load line isolator switch rotating type manually gear drive mechanism operated highest system voltage 36 KV rated current 1250 Amps triple pole with earthing device each pole consist of insulating pedestals 03 Nos on galvanized steel base as per BSS /IS incuding rotating blade of HDE copper and fixed contacts of same material , spring loaded arcing horns of adequate section to brake magnetizing current of transformer as directed with adequate 50mm dia GI operating pipe for operation from ground level and operating handle complete with both off and on positions complete all as specified and directed.

All as per item No 29 above but bus isolator without earthing device

Supplying ,fixing , testing of master trip relay , 50/24 Volt DC in control panel including wiring and taking down old UNSV relay complete all as specified and directed

Supplying ,fixing , testing of Trip circuit supervision relay , 50/24 Volt DC in control panel including wiring and taking down old UNSV relay complete all as specified and directed

Supplying ,fixing , testing of DC supervision relay relay , 50/24 Volt DC in control panel including wiring and taking down old UNSV relay complete all as specified and directed

Supplying ,fixing , testing of SF 6 gas pressure supervision relay , 50/24 Volt DC in control panel including wiring and taking down old UNSV relay complete all as specified and directed

Supplying and fixing in replacement PT fuse for 11 KV/110 V PT complete as directed at site

Supply installation, testing and commissioning in replacement Potential Transformer (PT) oil cooled out door single phase ( Earthed type) of voltage ratio 33 KV/110 V class 3P - 0.5-3, burden 50 VA insulation level of 70/170 KV as specified below:- (a) Normal System Voltage-33 KV (b) Highest System Voltage-36 KV (c) Rated Primary voltage- 33 KV/√3 (d) Rated secondary voltage- 110 V/√3 (e) Nos of Lt winding 2 (f) Metering Core Accuracy class - 0.5 (g) Metering Core Rated Burden- 50 VA (h) Nos of Phase- Single (Earthed Type) (j) Protection core accuracy class - 3P (k) Protection core rated Burden - 50 VA (l) Rated Voltage Factor - 1.2 continuous & 1.5 for 30 Sec (m) Insulation Level- 36/70 KV.170 KVP (n) Temp rise at rated contineous thermal current over ambient at site - 45 0C (o) Porcelain Bushing type - Hollow Cylinder (p) 1.2/50 mcro second impulse withstand test vol -170 KV (Peak) (q) Creepage distance of HV bushing - 900 mm (min) (r) Primary & Secondary winding material - Copper

Supply, installation, testing and commissioning in replacement 33 KV current transformer oil cooled out door single phase, oil immersed and self cooled type of ratio 800-400/1-1-1-1 suitable for metering and protection equipment installed on control panels terminal block as specified below :- (a) Normal System Voltage-33 KV (b) Highest System Voltage-36 KV (c) Rated Primary current- 800-400 Amp (d) Rated secondary current- 1 Amp (e) Nos of Core - 4 (f) Core01: Accuracy class 5P10, 10VA, ALF ≥10 (g) Core02: Accuracy Class 1.0, 10VA, ISF ≤ 5 (h) Core 03 Protection core accuracy class -PS,Protection knee point voltage- 300 Volt at lower ratio (j) Core 04-Spare (k) Continuous thermal current rating 120 % of rated primary current (l)Temp rise at rated contineous thermal current over ambient at site - Less than or equal to 45 degree C (m) Insulation Level- 36/70 KV.170 KVP (n) 1.2/50 Micro second impulse withstand test voltage- 170 KV (peak) (o) Short time thermal current rating for one second - 25 KA/1 Second (p) Dynamic Current Rating - 62.5 KA ( peak) (q) Porcelain Bushing type - Hollow Cylinder (r) Creepage distance of HV bushing - 900 mm (min) (s) Primary & Secondary winding material - Copper

M&L in replacement Earthing complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 2.25 m below normal ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to galvanized strip 32mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other nuts and washers of galvanised iron side complete all as specified, including testing and commissioning complete all as directed. Note :- (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in soft/loose soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 type C2 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement 6mm dia both ways as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe medium grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI lead wire and protection pipe upto 7.5 meter beyond the earth plates electrode.

S&F steel structure with ISMB/Channel/Angle iron/flat , 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 coat and one finishing coat of paint at 33 KV yard for fixing of isolator/CT/PT and for fixing of GO/DO etc complete as directed by Engr -In-Charge.

Supply and laying PVC insulated PVC sheathed cable galvanized steel strip or wire armoured electric control cables (Heavy duty) with stranded Copper conductor of size 2.5 sq mm 10 core 1100 Volts grade complete all as specified and directed.

All as per item No. 39 here in before but 2.5 sqmm 6 core copper conductor.

M&L for Bore earthig 150 mm dia buried by vertical boring machine, depth 50 mtr below ground level using earth electrode 50mm dia GI pipe medium grade duly drilled hole of 12mm dia, 115mm C/C on both side of the pipe including lowering in bore well upto the depth of 49 mtr and one mtr above the ground level. The pipe electrode should be filled around commericial salt charcoal dust, copper suphate and magnesium phosphate of 30 cm layer each upto the full length of pipe. The borewell should have 12 mtr of length 150mm dia MS pipe for protection of borewell. Welding of GI Strip 50mmx6mm on earth electrode GI Pipe 50mm dia upto 10mtr below ground level and 15 mtr from the bore well to test point gun metal and PCC foundation surrounding the borewell 60cmx60cmx30cm all as directed by Engr-in-charge. GI strip more than 25mtr will be measured and paid separately. Note :- Cost of gun metal test point deemed to be included in the quoted rate.

Taking out of heavy duty colling fan ,3 phase, 50 Hz of size 600mm form power transformer 33/11 KV of capacity 12/16 MVA ,servicing of the fan by opening including cleaning, greasing , replacement of defective spares parts such as bearing/ bushing, capacitor, canopy, clamp, blade, etc with new one and painting of fan body with synthetic enamel paint and re-assembling in same position after repairs and testing complete all as directed by Engr-in-Charge. Note :- (a) The cost of spare parts deemed to be included in quoted rates . (b) Rewinding of the fan will be measured and paid separately under respective item of schedule here-in-after.

All as per item No 42 here-in before but of size 450mm from power transformer 33/11 KV of capacity 16/20 MVA

M&L for Rewinding of heavy duty colling fan, 3 phase, 50 Hz of size 600mm of power transformer 33/11 KV capacity with super enamelled copper wire as per existing gauge including heating, varnishing, etc complete as required and directed.

All as per item No 44 here-in before but of size 450mm

S&F in replacement silica gel with breather assembly, suitable for power transformer 33KV/11KV of 16/20 MVA capacity complete all as specified and directed

Supplying, installation, commissioning and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, epoxy cast bar Primary type having ratio 1200/600/5-5-5 Amps , core -1, Class 10 P20 , 15 VA for protection , Core 2 Class 0.5 , 15 VA for metering, core -3 for differential protection , Short circuit time rating 18.4 kA for 3 Sec including associated wiring including taking down old UNSV CTs complete all as specified and directed

Supplying, installation, commissioning and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, epoxy cast bar Primary type having ratio 800/400/5-5-5 Amps , core -1, Class 10 P20 , 15 VA for protection , Core 2 Class 0.5 , 15 VA for metering including associated wiring including taking down old UNSV CTs complete all as specified and directed

Supplying, installation, commissioning and testing of 11 KV Current Transformer (CT`s), indoor type, resin cast epoxy type, of 13.1 KA/Sec having ratio 300/150/5-5 Amps having Core1: Class 5P10, 10VA for protection , Core2: Class 0.5, 10VA for metering and associated wiring including taking down old UNSV CTs complete all as specified and directed

Supplying, installation, commissioning and testing of 11 KV Current Transformer (CT`s), indoor type, resin cast epoxy type, of 13.1 KA/Sec having ratio 250/125/5-5 Amps having Core1: Class 5P10, 10VA for protection , Core2: Class 0.5, 10VA for metering and associated wiring including taking down old UNSV CTs complete all as specified and directed

S&F in replacement of vacuum interrupter suitable for 1250 amps, 11 KV HT VCB complete all as specified and directed

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in soft/loose soil for laying / taking up/ taking down of cables and getting out and levelling of bottom suface to required level all as specified and directed by Engineer- in- Charge.

Returning filling in,. Including spreading, levelling,. Watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point all as specified and directed by Engineer-in-Charge.

Material and labour for river washed and screened, dry sand for filling in trenches below and around underground cables for cushioning of cables etc, complete all as specified. Note : Measurement shall be taken after punning down.

Supplying & Laying reinforced precast concrete cable cover, class EHV, type 1 with peak, size 450mm x 230mm x 50mm in trenches for protecting under ground cable as per IS (for 33 KV Cable) complete all as specified and directed.

All as per srl item No 56 here-in-before but using old reinforced precast concrete cable cove obtained under srl item No 52 here in before.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300mmx 180mm x 40mm.

All as per srl item No 58 here-in-before but using old un-reinforced precast concrete cable cover obtained under srl item No 52 here in before.

Supplying, laying, jointing testing and connecting in replacement , XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 33 KV (E) grade, of size 400 Sq mm, 3 core, laid in trenches complete all as specified & directed. Note for item No 60 & 61:- Excavation, earth work ,cable protection , sand fillings , cable joint shall be measured and paid separately.

All as per item Ser No 60 above but size of cable 300 Sqmm , 3 core

Supply and fix Cable jointing kit for 33 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

400 sqmm 3 core.

300 sqmm 3 core.

Supply and fix Cable jointing kit for 33 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 following size :-

400 sqmm 3 core.

300 sqmm 3 core.

Material & labour for repair /servicing of RTCC panel of OLTC control panel of 33KV/11KV Power transformers of capacities 16/20MVA including repair /replacement to control wiring, repair to operation of OLTC from RTCC and checking of following and testing complete all as specified and directed :- (a) Digital Winding temp meter. (b) Digital oil temp meter. (c) Degital remote tap position indicator. (d) Indicator lamps. (e) Space Heater. (f) Fan auto working switch. (g) Analog to digital convertor and other spares required for displaying winding and oil temp.

All as per item ser No 68 here-in-before but 33KV/11KV Power transformers of capacities 12/16MVA

Supply only transformer oil of approved quality as per IS having dielectric strength of 45-60 KV in 2.5mm gap for filling in transformer or for topping up as required and directed

Supplying, laying, jointing testing and connecting in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 11 KV grade, IS 7098 marked, suitable for HT 11 KV(E) system laid in trenches fixed to pole, including jointing & testing of size 240 Sqmm 3 core complete all as specified and directed. Note : Excavation, earth work ,cable protection , sand fillings , cable joint shall be measured and paid separately.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 Sqmm.

Supply and fix 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 240 Sqmm .

Boring of holes under road, pavement, hard standing by trenchless technology using ultra sounding technique and necessary machine including HDPE pipe of 160 mm dia suitable for 0.6 mpa working pressure

Supply and fill in replacement silica gel in breather of transformer complete all as directed

NOTE :-(i)contractor should provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Eng-in-charge.

M P TYAGI ENGINEERS AND CONTRACTORS

Rajindera Enterprises

MV Engineers And Contractors

mayur enterprises

Buddham Builders

Vijay Electricals

DS CONSTRUCTION