Special repair replacement of EM infrastracture and BER EM items at AF Station Highgrounds

Dismantling of existing single / two / four pole structure including GOD, cross arms and insulation etc complete all as specified and as directed by Engineer-in-Charge.

Supply, installation, testing and commisioning 11KV extensible Outdoor duty (IP 55 enclosure) SF6 gas insulated 6-way motor operated Ring Main Unit comprising of 630 Amps Vacuum Circuit Breaker-1 no as incomer and 630 Amps Load Break Switch -5 nos as outgoing , cable termination from the bottom including test proof terminal joints-06 Nos, breaking capacity 21KA/3sec enclosed in insulated welded stainless steel tank having IP 67 Degree of Protection, leak rate of SF6 gas less than 0.1% and tested as per IEC 60056/60694/60298 comprising of protection CTs ring core type, with provisions to send data on Scada mounted on angle iron stand of size 50x50x6mm and necessary PCC platform casted in situ using PCC 1:2:4 type B1 and pedestal 30 cm high from GL with suitable nut, bolts, washers ,lifting hook complete all as specified in particular specifications here in after and as directed. . Make of RMU : SIEMENS (8DJH-ST)/ SCHNEIDER (FBX) / ABB (SafePlus- XT). Location : Main substation Note:-(i) The Cost of accessories viz. Antireflex operating handle , Battery 24V DC , 12Ah , Battery charger (I/P- 230V AC, O/P - 24V DC, Manometer with remote contact is deemed to be included in the unit rate quoted for the item. (ii) Necessary equipment and tools required for smooth functioning of panel will be arranged by contractor at no extra cost .

Supply, installation, testing and commisioning of 11KV extensible Outdoor duty (IP 55 enclosure) SF6 gas insulated 630 Amps Vacuum Circuit Breaker-1 no as incomer as well as outgoing, cable termination from the bottom including test proof terminal joint -02 Nos, breaking capacity 21KA/3sec, enclosed in insulated welded stainless steel tank having IP 67 Degree of protection, leak rate of SF6 gas less than 0.1% and tested as per IEC 60056/60694/60298 comprising of protection CTs ring core type,breaker should have line side earth switch, mounted on angle iron stand of size 50x50x6mm and necessary PCC platform casted in situ using PCC 1:2:4 type B1 and pedestal 30 cm high from GL with suitable nut, bolts, washers ,lifting hook complete all as specified in particular specifications here in after and as directed.

Disconnecting & taking out defective underground cable any size and any type from trenches, pole, pipe, floor, wall etc including brickscomplete all as specified and directed.

Supply, laying , jointing, testing and commissioning Low Tension (LT) XLPE insulated and armoured, heavy duty, electric power cable, cross sectional area 25 Sqmm 3.5 core aluminum conductor 1100 volts grade under ground cable including both side connection with cable lugs ,laid in trenches, along poles or passing through pipes or laid under floor or along walls complete all as specified and as directed.

Supply, laying , jointing, testing and commissioning Low Tension (LT) XLPE insulated and armoured, heavy duty, electric power cable, cross sectional area 70 Sqmm 3.5 core aluminum conductor 1100 volts grade under ground cable including both side connection with cable lugs ,laid in trenches, along poles or passing through pipes or laid under floor or along walls complete all as specified and as directed.

Supply, laying , jointing, testing and commissioning Low Tension (LT) XLPE insulated and armoured, heavy duty, electric power cable, cross sectional area 120 Sqmm 3.5 core aluminum conductor 1100 volts grade under ground cable including both side connection with cable lugs ,laid in trenches, along poles or passing through pipes or laid under floor or along walls complete all as specified and as directed. Note for item no 4 to 6 :- Excavation & earthork, sand cushioning and bricks for protection of cable shall be measured and paid separately.

M&L for Boring holes under road, pavement, hard standing by trenchless technology using ultra sounding technique and necessary machine including HDPE pipe of 150 mm dia suitable for 0.4 mpa working pressure and making good the surface to match the existing complete all as specified and as directed.

Excavation in trenches in soft/loose soil not exceeding 1.50 meter wide and not exceeding 1.5 meter in depth; for laying/taking out cables and foundations of poles etc and getting out complete all as specified.

Returning, filling in including spreading, leveling, watering and well ramming in layers not exc 25 cm thick each layer as in soft/loose soil, complete all as specified.