PROVN OF HT 11 KV VACUM CIRCUIT BREAKER (VCB) AT MAIN RECEIVING STATION AT NAMKUM POWER HOUSE UNDER GE RANCHI

Amount

Supply, installing, commissioning and testing vacuum Circuit Breaker of capacity 12 KV, 630 Amps, 25 KA with ruptering capacity 350 MVA totally enclosed metal clad, outdoor type switch gear panel board with vacum circuit breaker floor mounted with common copper bus bar, outdoor type compact rated current switch discharge, 630A, short time with stand current (3 sec) Horizontal Drawout type Vacuum Circuit Breaker shall be Comprising with following parts / spare :

(a) Vacuum interrupter of capacity 12KV,1250A, 25 KA with, rings and End rod insulators (b) Motor/Manual Spring charging mechanism - 230 V AC. (c) Closing & Tripping Coil. (d) Auxiliary Switch 0 6 NO. + 6 NC (e) Mechanical ON/OFF Indicator. (f) Mechanical close trip device ( ON/OFF). (g) Breaker Position Indicator. (h) Breaker Mechanical Spring Charged Indication. (j) Mechanical Operating Counter. (k) Automatic Safety Shutters & Mechanical Operation Counter. (l) Secondary Plug in Contacts. (m) Anti Pumping Relay above HT switch gear (VCBs) of 11 KV HT panel complete. (n) Insulation Level to be 28kVrms/75KVp.

11 KV Indoor single phase Resin cast current transformers (03 NOs) 12 KA with CT Ratio : 200 - 100 / 5+5 Amp ,Core I CL 1.0 with 15 VA burden for metering, Core II CL 5P10 With 15 VA for Protection burden short circuit rating 18 kA with insulation level 12kV/28kVrms/75kVp.

11 KV Indoor Fixed Type Three phase Resin cast potential transformers with Ratio : 11 KV /√3/ 110V √3, of 100 VA, voltage factor 1.2 cont., 1.5 for 30 sec., Rated Voltage 12 KV Cl. 1.0, voltage factor 1.2 cont., 1.5 for 30 sec, Insulation Level : 12kV/28kVrms/75kVp with HT fuge 3.15A (03 Nos) burden for metering & Protection.

Earth leackage relay Suitable Setting Range with CBCT -01.

Space heater 240V AC and thermostat with range of temp ( range 30° C -85°C) suitable for fixing inside kiosk of VCB -01 set

Illumination Lamp Holder with bulb 100W, 230V AC and Door operated switch for Illuminating lamp suitable for fixing inside kiosk of VCB -01 set.

MCB for 240V AC Supply in suitable size -01 nos.

Non- Discrepancy Type Circuit Breaker Control Switch with pistol grip handle, Spring return to neutral 3 - 01 No.

Busbar 25X 6 mm. Aluminium - 01 set.

Set of three phase air insulated main Copper bus bar of Suitable continuous current rating with PVC insulation of sleeves,. - 01 set.

M & L for provision of earthing complete with GI earth plate electrode 600x600x6mm thick buired directly in ground vertically to a depth not less than 2.25m below ground level with top edge of the plate at a depth not less than 1.5m below ground level, connected to and including GI strip 32x6mm with GI protection pipe 40mm dia light grade connected to and including by means of GI bolts, nuts check nuts and washers all as shown in electric plate No. 3 of SSR part-I including necessary excavation earth work in any strata, PCC 1:3:6 type 2 chamber, RCC 1:2:4, type B1 cover slab, 50mm thick with 8mm TMT bar 100mm centre to centre including 8mm dia handle and watering pipe medium garde 20mm bore, funnel, wire mesh, etc and testing on completion all as directed. Note : Galvanised iron strip 32x6mm upto 7.5 mtr will be includes in item.

Supply, laying, testing and commissioning of HT cable XLPE insulated screened PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminiium conductor, 11000 volts grade, crosss secctional area 95 Sqmm 3 core with earthed system laid in trenches or in duct/passed through pipes or fixed on walls/poles etc complete all as directed.

S & F cable jointing kit for 11KV (Earthred) grade, cable for indoor termination cold shrink type joint complete with jointing materials and accessories suitable for XLPE armoured alminium conductor cable of size 95 sqmm, 3 core complete all as directed.

Supply laying and testing PVC sheathed cable galvanised steel strip or wire armoured electric control cable (heavy duty) with stranded copper conductor of size 1.5 sqmm 8 core 11 Volts grade complete all as directed.

Excavating in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth for foundation, laying of cables, erection of poles, struts/stays etc.and getting out in soft/loose soil complete all as directed

Excavating in trenches not exceeding 1.5m wide and exceeding 1.5m in but not exceeding 3.0m depth for laying of cable, foundation etc, and getting out in soft and lose soil soil complete all as directed.

Returning filling in incl spreading leveling, watering and well ramming in layers not exc 25cm complete all as directed

Removing excavated materials/ soil to a distance n. exc. 50m and depositing where directed at a level n.exc 1.5 m above the starting point complete all as directed

M& L for Spreading ribbed soil in trenches as in cable cushioning all as per IS 1255-1983 complete all as directed. Note :- Excavated approved soil shall be ribbed by using sieve to separate composite particles etc as per IS and refiiling in trenches before laying of cable 8 CM and 15 CM after laying of cable. This is than gently punned down to a depth of 10 cm above the top of upper most cable (ii) For the purpose of measurement only punned thickness only will be considered for paymet.

Supply and laying unreinforced precast concrete cable cover, class HV, type 2, flat of size 450x180x40mm confirming to IS-5820 complete all as directed

Cutting the tarmac / hard standings and excavating in trenches across the road for laying cable including old removed earth to be refilled and making good the top surface to matched with existing surface by means of PCC 1:3:6, type C1 complete all as directed

M&L for Plain cement concrete 1:4:8 type D2 using 40mm grade stone aggregate as in foundations, filling and mass concrete complete all as directed.

Material and labour for Plain cement concrete 1:2:4 type B-1 using 20 mm graded stone aggregate in foundation, plinth courses, string courses, lacing courses, parapets with fair surface complete all as directed

M & L for Erection in vertical position steel tubular swaged pole (ISI market) with cast iron base plate, final taper plug, bolts, nuts & screws etc, type 410-SP-55 (11 Mtr long) confirming to IS 2713 part 1 to 3) 1980 including two coats of black bituminous paint throughout internally and externally upto planting depth and two coats of synthetic enamel paint of alternate black and red strips, 30 cm high over one coat of red oxide primer upto 1.5m height from ground level/coping. The remaining portion shall be painted with two coats of aluminium paint over coat of red oxide primer complete all as directed. Note : Necessary earthwork, excavation shall be measured and paid for separately.

S & F Lightning arrester suitable for 11 KV, expulsion type, confirming to IS- 3070 part-I of 1985 complete with all fittings transmission class, discharge capacity of 65 KA complete all as directed.

Supply and fix HT 11KV outdoor type Gang operated air break switch of rating upto 400 amps, vertical mounted fixed complete with 9 insulators including DO fuses, operating rod of 25mm dia medium garde GI tubing of suitable length, operating handle with locking arrangement fixed to pole with suitable size of MS clamps to be operated from ground level, provn of insulated connected leads of connections with required accessories complete all as directed.

S & F Pin type, porcelain vitreous, white brown or green insulator including one galvanised mild steel spindle, two galvinised iron washers and one galvanised iron nut , 150 mm height 150mm dia for 11000 volts grade complete all as directed.

Material and labour for replacement of expulsion / drop out / horn gap type fuse carrier assembly outdoor type 200Amps capacity above 25 Amps & upto 50Amps including insulator and fuse element conforming to IS specifications suitable for 11000 volts (HT) complete all as directed.

S & F Danger notice plate of 1.6mm thick mild steel sheet, vitreous enamelled white with letters, figures and conventional skull and bones in signal red colour and fixed with M.S clamps, bolts, and nuts of approved size for HT 25x20cm size complete all as directed.

M & L for cross arms. Bracings supports, clamps and back plates fabricated from structural steel sections including nuts, washers, welding, bending cold or hot drilling holes for bolts in any shape or size as directed and inclusive of one primer coat, one under coat and one finishing coat of synthetic enamel paint complete all as directed

M & L for galvinised iron strip 32x6mm burried in ground for earthing beyond 7.5m complete all as directed.

M& L for GI tubing medium grade of size 100 mm dia fixed on walls / laid in trenches as protection pipe for under ground cable including provisioning of specials and clamps etc including taking down of old unseviceable pipe any type and any size complete all as directed.

M/S HINA ELECTRICALS