SPECIAL REPAIRS / REPLACEMENT OF BER OIL CIRCUIT BREAKERS PANELS TO VACCUM CIRCUIT BREAKERS PANELS AND CONNECTED WORKS AT CERTAIN LOCATIONS AT AF STATION HAKIMPET

Amount

M&L cable jointing Kit for 11KV grade cable for end box indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 50 Sqmm to 95 Sqmm including taking out unserviceable joint kit complete all as specified and as directed.

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, 3.0 core including taking down perished / unserviceable HT under ground cable any type complete all as specified and as directed.

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

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

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

Supplying and laying un-reinforced precast concrete cable covers, class HV, Type 1, flat, size 300 mm x l80 mm x 40 mm including taking out unserviceable covers complete all as specified and as directed.

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

Removing surplus excavated material to a distance not exc 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and as directed.

Material and labour for 80mm dia bore tubes, 'light grade' galvanised, with all fittings and fixed complete to walls / poles or laid in trenches / floors for cable protection including taking out unserviceable pipe complete all as specified and as directed.

Taking out existing OCB and Supply, install, test and commissioning of 11 KV switchgear panels comprisisng of of 11 KV Vacuum Type Circuit Breakers out door type with complete locking system, 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 21 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 and boots suitable for bottom front entry termination of 3.0 core cable 95/120/185 Sqmm. The incoming and outgoing panels shall be equipped with and confirming to the following detailed specifications:- (NOTE :- Old OCB including accessaries removing to MES Store Yard and necessary RV attached to Final Bill)

(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

(h) 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 internal arc type tested as per latest IEC 62271-200.

NOTE: The quoted rate shall be deemed to include for the following:- (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. (iii) Necessary cable duct of required size and 4 Mtr length at both side alongwith bus duct tray.

M&L for Earthing complete with galvanized steel earth plate electrode 600x600x6mm thick buried directly in ground earth pit not less than 2.25 mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to galvanized iron strip 32×6mm as earthing lead by mean of nut/bolt and washer of galvanized iron or steel as shown in electrical plate no 3of SSR part I including necessary excavation and earth work GI pipe 20mm dia light grade for watering and GI 15mm dia light grade pipe for protection of GI earth wire etc, PCC chamber with PCC cover in cement concrete 1:2:4 Type B1(20mm graded aggregate), funnel, wire mesh, charcoal dust, salt etc, connected to LT panel board as indicated including testing complete all as specified and as directed.

M&L for 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 as directed.

Srinivasa Consructions

Srinivash Engineers

M/S - KRUPA ELECTRICALS