CERTAIN REPAIR / MAINTENANCE OF EXTERNAL ELECTRIC SUPPLY INSTALLATION, TRANSFORMER, VCB, HT PANEL, HT/LT CABLE AND HT GOD SWITCH AND ALLIED WORKS AT NAUSENA BAGH, NOFRA, INS SARDAR PATEL AND NAVAL AIR ENCLAVE UNDER GE NAVY PORBANDAR

Amount

M&L for carrying out the periodical check and preventive maitenance as detailed below for the entire system comprising of the existing HT VCBs, 11 KV, 630 Amps, 18.4 kA with VCB panel at Nausena bagh and Nofra 11 KV Substations complete all as specified and as directed:-

Servicing (i.e. light primary terminals) & carrying out repair/replacement (as directed) of defective minor components.

Inspection / Overhauling of earth fault Release Assembly, Tripping coil, Auxiliary switch etc.

Mechanism servicing and lubrication.

Calibration and testing of over current and earth fault relay by primary and secondary ejection method.

Control wiring tightness.

Insulation of VCB track, Greasing of wheel and checking for few movement for closing and withdraw.

Power connection tightness.

Contact resistance of main circuit.

Checking the operation of VCB

Overhauling and Caliberation of O/C & E/F relays, Aux relay (through primary injection/secondary injection), testing on each multiple setting of relay.

Checking and recording of IR value of breaker trolly

Testing CT & PT and their circuit.

Spray Painting to Transformer, upto 630 KVA capacity 11KV/433V, indoor type, with one coat of synthetic enamel paint after cleaning, scraping, and filling of cavities for out side surfaces of transformer complete all as specified and as directed by Engineer-in-Charge.

S & F digital Voltmeter 3 phase ,accuracy of class 5 of suitable size fixed in repair / replacement complete all as specified and directed.

S&F Ammeter 3phase accuracy of class 5 of suitable size and type fixed in repair / replacement complete all as specified and directed.

S&F indicating LED set (Red Yellow,Blue,Green) type to indicate incoming supply suitable for 24 V DC/110 VAC/230Volts AC fixed in repair / replacement complete all as specified and directed.

Supply and fixing LED aviation light yellow painted die cast aluminium alloy housing, built in-75VA step of transformer, heat resistant, clear thick glass and accessories fixed in repair / replacement complete all as specified and directed by Engr-in-charge.

Supply and fixing cable jointing STRAIGHT THROUGH JOINT for 1100V grade cable for straight through joint complete with Jointing material (Heat shrinkable)and accessories suitable for 3.5 core XLPE armoured, alluminum conductor cable of size 70 to 185 sq mm complete all as specified and directed by Engineer-In-Charge.

M&L for dismantling and refixing after repair of Air break gang operated switches vertical/horizontal mounted including insulators and operating mechanism for repair/ replacement of broken / worn out components such as insulators, nut/bolts GI pipe complete with oiling, greesing of operating mechanism complete all as specified and directed by Engr-in-charge.

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 of cable size 95 sqmm complete all as specified.

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 of cable size 95 sqmm complete all as specified.

M & L for 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 of cable size 95 sqmm complete all as specified.

Supply, laying, jointing and testing in repairs of XLPE insulated armoured (under ground) heavy duty electric cable with standard aluminum conductor 1100 Volts grade of cross sectional area 10 sqmm 4 core laid in trenches/ducts/through pipes /in floor road/along the pole etc complete all as specified. Note : 1. The cost of Al thimbles/lugs and cable gland etc is incl in quoted rate and no extra payment will be made for it. 2. The excavation, earth work, sand cushioning and cable protection etc will be measured and paid separately under respective items.

Supply, laying, jointing and testing in repairs XLPE insulated armoured (under ground) heavy duty electric cable with standard aluminum conductor 1100 Volts grade of cross sectional area 25 sqmm 3.5 core laid in trenches/ducts/through pipes /in floor road/along the pole etc complete all as specified.

Supply, laying, jointing and testing in repairs XLPE insulated armoured (under ground) heavy duty electric cable with standard aluminum conductor 1100 Volts grade of cross sectional area 50 sqmm 3.5 core laid in trenches/ducts/through pipes /in floor road/along the pole etc complete all as specified.

Supply, laying, jointing and testing in repairs XLPE insulated armoured (under ground) heavy duty electric cable with standard aluminum conductor 1100 Volts grade of cross sectional area 70 sqmm 3.5 core laid in trenches/ducts/through pipes /in floor road/along the pole etc complete all as specified.

Supply, laying, jointing and testing in repairs XLPE insulated armoured (under ground) heavy duty electric cable with standard aluminum conductor 1100 Volts grade of cross sectional area 120 sqmm 3.5 core laid in trenches/ducts/through pipes /in floor road/along the pole etc complete all as specified.

Supply, laying, jointing and testing cable in repairs, XLPE insulated screened PVC bedded galvanized steel strip or wire armoured electric power cable (Heavy duty) with stranded aluminium conductor cross sectional area 95 sqmm 3 core suitable for working on 11000 Volts earthed system, laid in tranches, in floor, in ducts, through pipe or along pole complete all as specified and directed.

Excavation in trenches n.exc 1.5 mtr wide and n.exc 1.5 mtr in depth including taking down old cable all as specified & directed in Hard/dense soil complete all as specified and directed.

Excavation in trenches exc 1.5 mtr n.exc 3.0 mtr in depth including taking down old cable all as specified & directed in Hard/dense soil complete all as specified and directed.

Returning filling in including spreading, levelling, watering and well ramming in layers not exc. 25 cm in thick all as specified and directed.

Removing excavated material to a distance not exc 50 mtr and depositing where directed at a level n exc 1.5 m above the starting point complete all as specified by the Engineer-in-charge.

S& F in replacement of laying of Double Walled Corrugated (DWC) HDPE pipe of size 40mm outer dia and 32 mm inner dia conforming to IS 16205 Part -24 including necessary bends, coupling ,tees, reducers, spacers, end caps, rubber rings etc having pressure rating not less than 450 N through trenches/wall/floor/on pole in any type of soil for protection of electric cable complete all as directed by Engr-In-Charge. Make:- ASTRAL TELEREX / Berlia Electricals Ltd. / Prince / Supreme.

S& F in replacement of laying of Double Walled Corrugated (DWC) HDPE pipe of size 60mm outer dia and 50 mm inner dia conforming to IS 16205 Part -24 including necessary bends, coupling ,tees, reducers, spacers, end caps, rubber rings etc having pressure rating not less than 450 N through trenches/wall/floor/on pole in any type of soil for protection of electric cable complete all as directed by Engr-In-Charge. Make:- ASTRAL TELEREX / Berlia Electricals Ltd. / Prince / Supreme.

S& F in replacement of laying of Double Walled Corrugated (DWC) HDPE pipe of size 90mm outer dia and 75 mm inner dia conforming to IS 16205 Part -24 including necessary bends, coupling ,tees, reducers, spacers, end caps, rubber rings etc having pressure rating not less than 450 N through trenches/wall/floor/on pole in any type of soil for protection of electric cable complete all as directed by Engr-In-Charge. Make:- ASTRAL TELEREX / Berlia Electricals Ltd. / Prince / Supreme.

Galvanised tubing light grade 80 mm nominal bore for passing of cable, fixed to poles / walls / laying under floor/ roads complete with and including fittings, clamps nut bolts as required complete all as specified and as directed.

M & L for providing and fixing of Earthing Pit with 6 Meter depth boring of 100 mm diameter including 100 mm dia medium grade pvc pipe along with Inserting Galvanized Iron Pipe medium grade 50 mm dia connected to GI Earthing Strip of size 32x6 mm by means of nuts, bolts and washer, earth lead & connected to eqpt as directed including backfilling with excavated smooth stuff, charcoal and salt & chemical powder for improving the result and value of earthing not more than 1 ohm including testing of pit resistance with 2 point method,testing on completion including excavation / earth work in any type of soil / rock, including masonry work for PCC chamber 600mmx600mm (1:3:6) using 20mm graded stone aggregate and 50mm thick RCC (1:2:4) type B-1 cover slab reinforced with 8mm dia TMT steel bars @ 100mm c/c both ways and testing on completion complete all as specified and directed by Engr-in-charge. Note :- Earth pit shall be constructed 50cm from the side of excavation to avoid sinking of pit.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 400 Amps, 3/4 Pole, 18/36 KA, suitable to be fixed in LT panel complete all as specified and directed.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 200 Amps, 3/4 Pole, 18/36 KA, suitable to be fixed in LT panel complete all as specified and directed.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 160 Amps, 3 Pole, 36 KA, suitable to be fixed in LT panel complete all as specified and directed.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 125 Amps, 3 Pole, 16 KA, suitable to be fixed in LT panel complete all as specified and directed.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 100 Amps, 3 Pole, 16 KA, suitable to be fixed in LT panel complete all as specified and directed.

Supply and fixing in repair MCCB, AC 415 V, 50 HZ, fixed type, capacity 63 Amps, 3 Pole, 16 KA, suitable to be fixed in LT panel complete all as specified and directed.

S&F Earthing continuity galvanised iron strip 32 x 6 mm or main earthing lead fixed to wall with saddle or recess or crosses or buried in ground or drawn in conduits/pipe or fixed to poles or any other indicated situation for loop earthing etc as required all as specified and directed by Engr-in-Charge.

M & L opening the bus bar and rear panel of LT Panel board (01 Nos incoming and upto 04 Nos outgoing), disconnecting the cables from the bus bars, replacement of suitable size of aluminium lugs of various size (25 sq mm to 300 sq mm) through desired method, replacement of burnt out nuts/bolts, replacement of cable glands, replacement of internal wiring, replacement of partially burnt out bus bar (if required) taking down carefully the copper/aluminium bus bar as required at site, scrapping the bus bar by emery paper for removing the silt/carbon, replacement of PVC insulation tape (RYB) and assembling the bus bar, LT Panel board , including cleaning of panel, tightening sealing of existing connection as directed complete for testing all as specified and directed.

M & L opening the bus bar and rear panel of LT Panel board (01 Nos incoming and upto 08 Nos outgoing), disconnecting the cables from the bus bars, replacement of suitable size of aluminium lugs of various size (25 sq mm to 300 sq mm) through desired method, replacement of burnt out nuts/bolts, replacement of cable glands, replacement of internal wiring, replacement of partially burnt out bus bar (if required) taking down carefully the copper/aluminium bus bar as required at site, scrapping the bus bar by emery paper for removing the silt/carbon, replacement of PVC insulation tape (RYB) and assembling the bus bar, LT Panel board including cleaning of panel, tightening sealing of existing connection as directed, complete for testing all as specified and directed.

Power capacitor 25 KVAR Sq type complete all as specified and directed.

Power capacitor 10 KVAR Sq type complete all as specified and directed.

Power capacitor 5 KVAR Sq type complete all as specified and directed.

Power contactor 95 Amps 3 phase for 25 KVAR capacitors complete all as specified and directed.

Power contactor 50 Amps 3 phase for 10 KVAR capacitors complete all as specified and directed.

Power contactor 3 phase for 5 KVAR capacitors complete all as specified and directed.

Digital 3 phase Voltmeter range 44-480 V complete all as specified and directed.

Digital 3 phase Ammeter current input 50 mA-6 Amp, 50 Hz +- 5 % complete all as specified and directed.

Phase Indicating LED light RYB and ON off light set complete all as specified and directed.

Repair/replacement of U/S APFC Panel internal wiring with PVC insulated, solid copper conductor, FRLS cables, 1100 V, IS-694 marked of 16 Sqmm/10 sqmm/6 sqmm/2.5 smmm/1.5 sqmm size

Repair/Replacement of Power factor controller relay 12 stage Microprocessor based, modular type, intelligent APFC relay capable of having self-adjustment to any capacitor value suitable to maintain power factor between 0.95 to 0.99 with digital indication of power factor. Auto power factor improvement capacitor panel having aggregate capacity 123 KVAR in 12 stage with microprocessor based control, factory made indoor type, floor mounted, suitable for 415 Volts 3 phase 4 wire, 50 Hz AC supply system IEC/EN 81010

Srapping and Paining, filling cavities of rusted parts and two coat exposed steel surface with synthetic paint over one coat of red oxide paint APFC panel of any capacity.

Minor opening door repair work by means of welding or fabrication and Painting of LT panels Indoor/Outdoor type, with one coat of synthetic enamel spray paint over a coat of red oxide primer after cleaning, scraping, and filling of cavities for out side surface of LT panel complete all as specified and as directed by Engineer-in-Charge.

S& F Lightning arresters expulsion type for 11000 V complete with all fittings, transmission class, discharge capacity upto 65 kilo amp

M & L for general maintainance of 11 kv VCB's of different capacities and comprising the following: Disconnecting and dismantling the existing indoor type, 11 KV horizontal draw out type VCB trolly of rupturing capacity 250/350 MVA, 400/630/800/1000 Amps from location and repair /overhauling and carrying out with the following and all as specified and directed by Engineer-in-Charge. (Note: spare parts will be measured & paid seperately.)

(a) Inspecting / overhauling of manual / motorised spring drive mechanism by checking mechanism, motor and gear assembly, big gear assembly, stop bolt assembly, main shaft interlocking assembly, closing spring assembly, small cam with screw,motor cut -off limit switch, butter fly switch assembly and apply multi grease lubricant to function smoothly.

(b) Inspecting / overhauling of earthfault release assembly, tripping coil, auxilary switch etc and checking of electrical wiring system.

(c) Celebration & Testing of over current & Earth fault relay by primary & secondary ejection methods.

(d) Insulating of VCB track, greasing of wheel and checking for few movement for closing and withdrawing of VCB track.

(e) Cleaning/wiping the insulating components, primary & secondary circuits i.e green spots, carbon deposited completely.Inspecting / overhauling /cleaning and inspecting through insulators, vacuum interupters by carbon cleaner solution and apply dry graphite conductive sealant for electrical contacts to avoid carbon deposits on contact surfaces.

(f) Testing of primary & secondary circuit with 1000 Volts megger for insulation resistance.

(g) Flash testing of secondary circuit at 2000Volts for one minute after disconnecting the instruments from the panel. Assembling all items/components parts to the respective postion after high voltage test complete.

(h) Testing, sychronisation / calibration of meters and relays.

(i) Cleaning/wiping of busbar, phase barriers, Busbar support and sleeves.

(j) Scraping & painting the VCB (06Nos) with approved quality of grey paint all as directed by Engineer-in- Charge.

Dehydration of tranformer oil, obtained from transformers/voltage stabilizer Dielctric strength shall not be less than 40 KV in 2.5 mm gap electrode after dehydration. Dehydration of transformer shall be carried out by using electrically operated dehydration machine including replacement of unserviceable silica gel and toping up/ replacement of unserviceable transformer oil complete all as directed. (Note: Silica gel & new tranformer oil for top up shall be measured and paid against respective item. 2) Filteration of transformer oil shall be off loaded position of transformer.

Supply and filling transformer oil of approved quality ISI marked for filling in transformer for topping up/ replacement complete all as directed by Engr-In-Charge. Note:-(i) Dielectric strength of transformer oil not less than 60 KV with 2.5mm gap. (ii) New oil which is to be supplied for filling should be in a sealed barrel/container only.

Supply and fixing in repair of breather with 500 Grams silica gel for transformer upto 400 KVA, all as specified and directed by Engineer-in-Charge.

Taking of old silica Gel for dehydrating Breather of transformer, cleaning the breather internally and externally and filling new silica gel blue colour in dehydrating breather.

Pin type, porcelain, vitreous, white,brown or green insulator including one galvanised mild steel spindle,two galvanised iron washers and one galvanised iron nut, 150mm height, 150mm dia for 11000 volts grade all as specified and directed by Engr-in-Charge.

M&L for fixing and testing of vaccum interruptor of 11kv VCB including taking down old u/s or burnt vaccum intrupte of feeder panel complete all as specified & directed by Engr-in-Charge.

PCC 1:4:8 type D2 using 40 mm graded crushed stone aggregate as in foundation of poles complete all as specified and directed.

PCC 1:2:4 type B-1 using (20mm graded crushed stone aggregate) in lintels upto 1.5m clear span, cills, steps; seismic and other similar bands, plinth courses, string courses, lacing courses, parapets and railings upto 60 cm in height, copings, Benching, kneelers, apex stones, bed plates, kerbs, saucer drain(including finishing top surface of drain even and smooth without using extra cement), water troughs and the like including weathering, slightly rounded or chamfered angles and throating, and similar work including use & waste of necessary form work complete all as specified and as directed.

Steel tubular swaged poles swan neck type complete with cast iron base plate, finial taper plug, Cap, mild steel bolts, nuts,screw, etc. type 410 SP-31(9.0 meters long) erected in vertical position embedded in PCC foundation including painting with two coats of aluminium paint over a coat of primer and synthetic enamelled paint in alternate white and black strips 30cm wide each up to 1.5 Mtr height from top of coping complete all as specified and directed. Note :- Earth work, PCC for foundation and coping shall be measured and paid for separately.

Ditto all as per above item No. 63.00 but HT pole type 410-SP-55 (11.0 meters long) complete all as specified and directed.

S & F Switch air break gang operated triple pole mechanically operated mounted on insulator and steel frame out door type suitable for vertical installation single brake provided with locking arrangement, rocking tilting type consisting of MS channel ,HT post type insulator ,copper alloy high pressure assembly ,operating rod of GI pipe medium grade confirming to IS-1818 of 1972 ,suitable for 11000 volt ,400 Amps all as specified.

M & L opening the bus bar and rear panel of LT Panel board, disconnecting the cables from the busbars, replacement of suitable size of aluminium lugs of various size upto 400 sq mm) through desired method, replacement of burnt out nuts/bolts, replacement of cable glands, replacement of internal wiring, replacement of partially burnt out bus bar (if required) taking down carefully the copper/aluminium bus bar as required at site, scrapping the bus bar by emery paper for removing the silt/carbon, replacement of PVC insulation tape (RYB) and assembling the bus bar, LT Panel board complete for testing all as specified and directed.

S & F repair/replacment of Onload change over open execution type of capacity 400 Amps,4 pole,415 volt complete for all as specified and directed.