SPECIAL REPAIRS OF HT 11 KV BREAKER (VCB) PANEL AT MDSS AND REPLACEMENT OF FIVE FEEDER PILLARS AND ITS ASSOCIATED FITTINGS AT NCHC NAVAL BASE KARWAR

Design, Manufacture, Supply, Installation, Testing and Commissioning of HT, 11 KV VCB line up 08 panels, standalone switch boards consisting of 800 A VCB 11 KV - 01 No Incomer and 630 A VCB 11 KV - 07 Nos outgoing, Indoor type VCB, both side extendable, 630 Amps, 25 kA / 1 Sec. totally enclosed, free standing, floor mounting type, compartment based with truck mounted Vacuum Circuit Breaker, Spring Operated Electrically and Manually Charged Operating Mechanism suitable for horizontal isolation, horizontal draw out type VCBs with copper bus bars, Self supported Insulated Busbar with full voltage rated, complete VCB Panel conforming to IEC 62271-200 standards and IP 4X Class of protection comprising necessary bus-bar extensions and connections, Circuit Breaker suitable for E2, M2, C2 duty,

Vacuum Interrupters of the circuit breakers completely encapsulated in epoxy housing, Switchgear and control gear panels of fully arc proof for 25 kA for 1 Sec AFLR with Microprocessor based Numerical Relay Communicable type in line with RS 485 Modbus Protocol, comprising of Three Over Current , One Earth Fault Protection Relay with high set for both Phase & Earth and with Fault Memory, Universal Auxiliary Supply, Master Trip Relay, Trip Circuit Supervision Relay, Digital Multifunction Meter with Class 1.0, PT 11KV/110V AC, Power Pack 11KV/230V AC Complete all as specified and as directed and with the following features:-

11 kV, 800 Amps, 25 KA VCB Incomer Panel - 01 No Shall be consisting of: [a] 800 Amps Continuous high conductivity electrolytic copper bus bar, Raychem Insulated for full voltage, phase identification made at the end by coloured tape, bus bar shall be mounted on integral seal of bushing and inter connection with electrolytic grade copper with joints silver plated. [b] Circuit Breaker shall be mounted on with drawable truck which shall roll out horizontally from service position to isolated position with ease.

[m] Feeder Protection Relay with Phase over current (50/51), Directional phase over current (67), SOTF Switch On To Fault (50 HS), Current unbalance (46), Thermal overload (49), Earth fault (50N/51N), Directional earth fault (67N), Under voltage (27), Overvoltage (59), Zero sequence voltage protection (59N), Frequency (81), auto reclose (79), Circuit breaker failure (50BF),Cold load pick-up and magnetizing inrush, Programmable stages (99), CB wear. Relay shall have 4CT and 4 VT inputs. Relay shall be provided with at least 16 digital inputs and 8 digital out puts and 1 self-supervision output. Relay shall have also these features inbuilt. MIMIC display with single line representation and switch gear controls shall be possible through the MIMIC. Shall support native IEC 61850 communication Protocol, front USB for connecting to PC, conformal coating to withstand harsh environment, support PRP redundancy communication protocol on FO ports. Web server (web HMI) feature to monitor and control using LAN. Shall have minimum 1000 events. Relay shall support SNTP time synchronization & support customer defined programmable logic with minimum 8 programmable LED. Relay shall have disturbance recorder with settable sample rate from 8 cycle to 32 cycle. [n] Panel shall also have additional features like Continuous Rated Closing / Tripping Coils, Spring Charging Handle, Manual Closing / Tripping off the VCB with Compartment Door Closed, Short Time Rating 01 Sec as per IEC 62271-200 and VCB shall be suitable for E2, M2, C2 Class. [o] Breaker shall also be provided with Auxiliary Switch 6NO + 6 NC Contacts mounted on the draw out portion of the Switchgear and Position Cell Switch with 03 NO + 1 NC Contact each for Test Position and Service Position.

Supply and laying or fixing or passing through pipe or in cable ducts, 11000 volts (E) grade XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor of 3 core 240 Sqmm size.

Supply and laying or fixing or passing through pipe or in cable ducts, 11000 volts (E) grade XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor of 3 core 185 Sqmm size.

Supply, jointing & testing Indoor end termination cable joininting kit, heat shrinkable type 11 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 240 sqmm to 300 Sqmm all as specified and as directed.

Supply, jointing & testing Indoor end termination cable joininting kit, heat shrinkable type 11 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 120 Sqmm to 185 Sqmm all as specified and as directed.

Supply, jointing & testing straight through type cable joininting kit heat shrinkable 11 KV HT joint kit suitable for 3 core 240 Sqmm to 400 Sqmm PVC / XLPE insulated stranded aluminium conductor all as specified and as directed.

Supply, jointing & testing straight through type cable joininting kit heat shrinkable 11 KV HT joint kit suitable for 3 core 120 Sqmm to 185 Sqmm PVC / XLPE insulated stranded aluminium conductor all as specified and as directed.

M&L for Earthing complete with galvanised steel earth plate electrode 60cm x 60cm and 6 mm thick buried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) with top edge of plate not less than 1.5 meters below normal ground level, connecting to the Galvanised iron earth strip 32mmx6mm size, by means of bolts, nuts, check buts and washers of galvanised iron and 32mmx6mm earth lead protected by provision of GI medium grade pipe 40mm bore including provision 40mm thick cover of RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 40mmx40mmx6mm with 6mm dia MS bar handle made to shape, GI light grade 20mm bore pipe for watering of suitable length placed on top edge of earth plate, common salt and charcoal filling, 15 CM alternate layer of charcoal and salt around all sides of earth plate with fixing arrangements, funnel, wire mesh and earth work in any type of soil, returning filling in and removal of surplus soil to a distance not exceeding 50 metre complete all as per plate No 03 of SSR-2009 Part-I and connecting to earth test point all as specified or indicated including testing on completion.

Disconnecting, dismantling of existing LT distribution panel and supply, fabricate, install, testing and commissioning of LT feeder panel board of suitable size (Depth of panel not less than 500MM), out door type double door, dust and vermin proof made out of 3.15 mm thick MS sheet mounting on MS angle iron 50x50x6 MM size , height of legs not less than 750 mm height, suitable foundation of 150 mm thick PCC (1:3:6) type C 2 with 100 mm offsets and panel board with front and back opening and locking arrangement compete two coats of finishing powder coated paint of approved shade over one coat of red oxide primer including oriental bus bar of aluminium strip 800 amps for three phase 4 wire including the following accessories and fitted in : -(a) Incoming: (i) MCCB high breaking capacity 4 pole 415 volt 36 KA breaking cap adjustable thermal release range 400 amp – 01 No (ii) Digital type Volt meter & amps meter with suitable capacity of CTs,LED indicator lamp and other connecting accessories (b) Outgoing: (i) MCCB AC high breaking capacity 3 pole 415 volt 25 KA breaking cap adjustable thermal release range 125 amp – 02 Nos (ii) MCCB AC high breaking capacity 3 pole 415 volt 25 KA breaking cap adjustable thermal release range 100 amp – 15 Nos (iii) MCCB AC high breaking capacity 3 pole 415 volt 25 KA breaking cap adjustable thermal release range 63 amp – 02 Nos (iv) Three phase digital Timer switch with suitable cap of contactor controlled by existing 63 amp MCCB for street light – 2 Nos (v) MCB SPN 40 Amps - 4 Nos all as directed by the Engr In Charge.

Note for tem no 1 :- The rate quoted shall include the excavation for existing cable any of size removing from its loop, cleaning, cutting of old termination and reconnecting the same along with suitable new aluminium lugs, glands and refilling of cable trench complete all as directed.

Excavation in trench not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth and not exceeding 1.5m for laying of LT under ground cables/GI pipes getting out as in soft /loose soil complete all as specified and directed.

Returning filling in including spreading leveling watering and well ramming in layer not exceeding 25 cm in soft/loose soil all as specified and directed.

Removing excavated material/soil not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point all as specified and directed.

Supply & filling sand cushioning to under ground cable 8 cm before laying the electric cable and 15 cm after laying the cable complete all as specified considering as per SSR 1991 of part -I Note: Only punned thickness of the sand will be measured.

Supplying and laying unreinforced precast concrete cable cover, class LV Type-1, flat size 250mm x 150mm x 40mm with ISI mark factory made complete all as specified and directed.

GI tubing 'Light' grade 50 mm bore with all fittings for cable protection fixed on poles/walls/laid under roads crossing etc and made good the disturbed surfaces/area for following sizes of pipes :-

Taking down carefully old unserviceable UG cable of any size from the trenches/wall/pole and keeping aside for reuse and remove the unserviceable cable from site after affording credit depending on its serviceability state including removal of brick/PCC cable cover complete all as specified and directed.

Supply and Laying LT UG cable 1100 Volts grade XLPE insulated PVC sheathed amoured, heavy duty, in trenches/walls/poles/passing through pipes with multistranded aluminium conductor including lugs/thimble/ferules connection, testing and commissioning complete including taking out old unserviceable cable for 50 sqmm 3.5 core. Note: [i] Earth work, excavation sand cushioning, bricks for protection, GI pipe etc shall be measured separately under relevant items of this schedule Note: [iI] Old retrieved LT cable found in serviceable condition from taking out shall be re-use/relay in the work Note: [i] Earth work, excavation sand cushioning, cover for protection, GI pipe etc shall be measured separately under relevant items of this schedule

All as per Item No.17 above but for 240 sqmm 3.50 core

M&L for heat shrinkable straight through joint for LT UG cable including jointing kits complete for making joints suitable for aluminium conductor cable of size 3.5/ 4 core 25 to 35 sq.mm.

All as per Item No. 19 herein before but for cable of size 3.5 core 240 sq.mm.

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