ADDITION ALTERATION AND SPECIAL REPAIR TO LOW TENSION UNDER GROUND CABLE AT INS DWEEPRAKSHAK AND ND ANDROTH AND PROVISION OF ISOLATION TRANSFORMER 75KVA FOR COMCEN, INS DWEEPRAKSHAK, KAVARATTI UNDER GE NAVY LAKSHADWEEP

Amount

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 depth and getting out soft/loose soil for laying cables /pipes /erection of poles etc.complete all as specified and as directed by Engineer in charge.

Returning filling in, with excavated soils incl. spreading, levelling, watering and well ramming in layers n.exc. 25 Cms. all as specified and directed and upto the satisfaction of Engineer in charge.

Removing excavated material/ surplus soil exceeding 250 M and n.exc. 500M and depositing where directed at a level n.exc. 1.50M above the starting point,all as specified and directed and upto the satisfaction of Engineer in charge.

Supply, install, commissioning and testing of three phase four wire ,indoor type oil cooled Ultra Isolation Transformer of capacity 75 KVA , 50 Hz microprocessor based technology , naturally oil cooled, copper wound & designed for following specifications: (i) Ratio 1:1, (ii) Regulation Better than 3.5%, (iii) Efficiency 98 %, (iv) Power Factor 0.8 Lead to .8 Lag, (v) Di-Electric strength 3kv for 60 Sec, (vi) Insulation Resistance Better than 500 Mega Ohms, (vii) Coupling Capacitance 0.01pF for 100 dB, (viii) Leakage Current < 20 Micro Amps, (ix) Common Mode Attenuation 100 db./ 120 db., (x) Operating temperature 0˚ C - 45˚ C Ambient Protections circuit includes Electronic over voltage trip, Electronic under voltage trip, Overload and short circuit protection. Single phasing prevention & cut off Phase reversal protection & cut off Metering LCD type Input voltage P-N Output voltage p-p Load current in all phases frequency complete all as specified and as directed by Engineer in charge.

Material and labour for copper earthing complete for with Copper earth plate electrode of size 600 mm x 600 mm x 3.15 mm thick buried directly in ground earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level, Alternate layers of charcoal) & common salt Crystal, in and including back filling compound(BFC Chemical) in layers upto the top edge/ ground level and connected to copper earth strip 20 x 3 mm by means of bolts, nuts, check nuts & washers of copper and connecting to earth dolly, equipment all as shown in electrical plate No. 3 of SSR Part I of 2010 & testing complete including 40mm dia light grade GI pipe upto 7.5 mtr long, excavation in any type of strata, RCC ( 1:2:4 ) type B1 earthing chamber, reinforced with 8mm dia TMT bars @ 7.5 cm c/c both ways, pre cast slab 50 mm thick in cement concrete ( 1: 3 : 6 ) type C1 ( reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg / Sqm with frame, including 20 mm bore water pipe medium grade GI Tubing including GI Funnel , wire mesh etc complete all as specified in EP No.3. complete all as specified and as directed by Engineer in charge. NOTE :- (i) Copper earth continuity conductor 20x3 and GI light grade protection pipe 40mm dia beyond 7.5 mtr shall be measured and paid under the respective items ). (ii) The rate is is inclusive of excavation and eathwork in any type of soil, RFR and removal

Material and labour for copper strip 20 x 3 mm Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc as required complete all as specified and as directed by Engineer in charge.

Supply, install, commissioning and testing for factory made outdoor type/Floor mounted thermoplastic polycarbonate cubical type feeder pillar box IP 65 protection suitable for 3 phase 4 wire 415 V, 50 Hz of size (1700x2050x700mm) with 400 Amps rated copper busbar, internal wiring connection with suitable size copper cables and MS angle iron based frame painted with two coats of synthetic enamel paint over a coat of red oxide primer, LT feeder pillar box shall be manufactured by CRPI approved manufacturer including PCC foundation to accmoomodate and comprising of following:- (i) On Load change over switch TPN 415V 250A 36kA-01 (incoming) (ii) MCCB TPN 415V 100A 36kA-04 & 63 Amps 25 KA -04 (outgoing) (iii) Digital voltmeter 0-500 V 01 No (iv) Digital ammeter with Cts 250 amps- 01 No (v) Tamper proof digital KWH enery meter with CTs - 01 No (vi) Indicator lamp LED type 240V AC (RYB) - 01 set complete all as specified and as directed by Engineer in charge.

Supply, install, commissioning and testing for 4 core 16 Sqmm cable XLPE Insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty) 1100 Volts grade including taking down unserviveable cable complete all as specified and as directed by Engineer in charge.

All as per item no. 8 here in above but 4 Core 25 Sqmm

All as per item no. 8 here in above but 3.5 Core / 4 Core x 50 Sqmm

All as per item no. 8 here in above but 3.5 Core / 4 Core x 70 Sqmm

All as per item no. 8 here in above but 3.5 Core / 4 Core x 95 Sqmm

Supply and laying of burnt bricks sub class 'B' brick for cable protection complete all as specified and as directed by Engineer in charge.

Material and labour for sand cushioning with Local Sand in two layer,first layer of 80mm thick before laying of cable and second layer of 150mm thick after laying of cable in trenches / ducts for cable including consolidation of each layer complete all as specified and as directed by Engineer in charge. Note:Thickness of sand cusioning shall be measured after punning.

Material and labour for PCC 1:3:6 type C2 (40 mm graded aggregate) for foundation for poles and for keeping AC outdoor units complete all as specified and as directed by Engineer in charge.

Material and labour for PCC 1:2:4 type B-1 (20 mm graded aggregate) for pole coping complete all as specified and as directed by Engineer in charge.

Supply and fix LED bollard lighting with ingress protection, provides comfortable soft area lighting complete all as specified and as directed by Engineer in charge. Make : Phlips cat No.BCP150LED150/WW PSU 220-240V 7043 or equivalent makes listed in PS

Supply and fix ON LOAD CHANGEOVER SWITCH three phase 440V, 4 P of current rating 160 A with breaking capacity 36KA along with necessary fixing arrangements complete all as specified and as directed by Engineer in charge. Make: L&T Model:CO2-200 or equivalent makes listed in PS

Supply and fix ON LOAD CHANGEOVER SWITCH three phase 440V, 4 P of current rating 250 A with breaking capacity 36KA along with necessary fixing arrangements complete all as specified and as directed by Engineer in charge. Make: L&T Model:CO2-200 or equivalent makes listed in PS

Supply and fix cable route indicator for LT Cable 1100 Volts fabricated out of cast iron 150mm dia 6mm thick not less than 1 Kg duly marked with LT cable 1100 volts fixed(duly riveted) on on equal angle iron 30 x 30 x 5mm thick 0.6m duly painted with two coats of alluminium paint over a coat of alluminium red oxide primer and grouted in PCC 1:4:8 type B-1 0.3 m below normal ground level complete all as specified and as directed by Engineer in charge.

Supply and fix GI pipe 50mm dia light grade with all fittings laid in trenches for cable protection for road crossing or pole /wall complete all as specified and as directed by Engineer in charge.

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