SPECIAL REPAIRS FOR REPLACEMENT OF BER OIL CIRCUIT BREAKER PANELS AT ATC AND CONNECTED WORKS AT AFS HAKIMPET

Amount

M&L cable jointing Kit for 11KV grade cable for end box/termination indoor heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 50 Sqmm to 95 Sqmm complete all as specified and directed by Engineer-in-charge.

S&F XLPE insulated screened,PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts grade, cross sectional area 95 Sqmm, 3 core including taking down perished/unserviceable HT under ground cable any type complete all as specified and as directed.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m depth and getting in hard/dense soil for laying of cables/ for erection of poles/ for stay assembly etc complete all as specified and directed by Engineer-in-Charge.

Cutting of road, pavement, hard standing by trenchless technology suitable for passing GI/HDPE pipe 80mm dia and refilling with suitable PCC to match with exiting level and all as specified and directed by Engineer in charge..

Supply and spread clean dry river sand in trenches for cushioning of cable complete all as specified and directed by Engineer-in-Charge. (Note: Punned down thickness only shall be measured for the purpose of payment)

Supplying and laying un-reinforced precast concrete cable cover, Class LV, Type I, flat, size 250 mm x 150mm x 40mm ISI Marked complete all as specified and directed by Engineer-in-Charge.

Returning, filling in trenches including spreading, levelling, watering and well ramming in layers not exceeding 25cm complete all as specified and directed by Engineer-in-Charge.

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

Material and labour for 80mm dia bore tubes, 'light grade' galvanised, with all fitting and fixed complete to walls/ poles or laid in trenches/ floors for cable protection complete all as specified and directed by Engineer-in-Charge.

Supply, install, test and commissioning of 11 KV switchgear panels comprisisng of of 11 KV Vacuum Type Circuit Breakers, Instrument Panels and Instrument Transformers etc enclosed in metal clad cubicle, dust and vermin proof with necessary isolation arrangement. Each panel shall be easily extensible on either side and should be provided with 3 phase 630 Amps 25 KA copper bus-bar with heat shrink PVC sleeves insulation, continuous earth bus at the bottom of the panel capable for carrying full short circuit current for 1 sec, necessary internal copper connections, small wiring, HT/LT fuses and supporting frame work with nut, bolts to secure it to the floor complete for all the incoming and outgoing panels including taing down BER VCB and connected Equipment complete . The incoming and outgoing panels shall be equipped with and confirming to the following detailed specifications:-

(a) Triple pole 350 MVA, 11 KV, 50 Hz, 630 Amps draw out type Vacuum Circuit Breaker fitted with arc control device, interlocks, auxillery switches, isolating contacts, emergency hand trip device, mechanical 'ON' & 'OFF' indicator and motor operated spring charging mechanism with manual charging of closing spring facility - 01 No.

(b) Current Transformers (CTs) of ratio 20/5-5A of 15 VA output, accuracy class 1.0 for metering instrument and 5P10 for 15VA accuracy for over current and earth fault protection - Sets of 03

(c) 3 Phase Star/Star connected resin cast Potential (Voltage) Transformer of ratio 11KV/√3 /110V/ √3 having 50 VA output for phase with accuracy class 1.0 as per IS:3156(Part-II) 1965 complete with HT & LT fuses, isolating plugs and sockets for HT & LT Copper connectons, current limiting resistances- 01 No

(e) Circuit breaker control handle - 01

(f) Cubicle Illumination lamp with door operated ON/OFF switch-01 No

(g) Anti-condensation tubular space heater suitable for connection to 230 V AC Supply with a thermostat & a MCB. - 01No

(h) Suitable battery backup bank for functioning of relays alongwith MS rack battery bank stand with connecting terminals and all other accessories complete - 01 Set

(i) Having following additional facilities:- 1. Trip circuit supervision. 2. Disturbance recorder. 3. Event log with date and time. 4. Measurement and control feature.

(j) Panel should also have additional facility like: 1. Intemittant rated closing and tripping coil. 2. Fully intenal arc type tested as per latest IEC 62271-200 NOTE: The quoted rate shall be deemed to include the following:- (i) Dismantling of Old/ BER VCB & connected panels complete and removal from site ,handing over to AGE E/M at store yard for safe custody. (i) Cable compartment shall be provided at the rear side with rear bolted type box covers provided with an inspection window for enabling operator to have visual inspection without opening back cover in live condition for all incoming and outgoing VCB panels. (ii) Complete with internal and external connection with each other or as per ground requirement.

M&L cable jointing Kit for 11KV grade cable for outdoor termination, heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 35 Sqmm to 95 Sqmm complete all as specified and directed by Engineer-in-charge.

OM SAI POWER SYSTEMS