Upgradation of Banarhat RH under Banarhat Block in the district of Jalpaiguri ---- External Electrical Installation Works.

Supply and installation of L.T. cubical type fully compartmentalized distribution panel board, having rigid and self supporting structure fabricated with 14 SWG CRCA sheet with M.S. angle iron frame (main frame with 50 x 50 x 6 mm angle and each vertical compartment with 40 x 40x6 mm MS angle iron). The base of panel should be made with 75mm x 40mm x 4.4 mm M.S. channel. [Manufacturer/ Fabricator having Test Certificates from CPRI]. An Auto Cad Drawing of the panel has to approved by EIC before making of panel.

Construction Details :

All incoming & outgoing switches are to be housed in respective compartments hinged and gasket doors at the front. All doors should have panel locking arrangement in such a fashion that it can not be on unless the feeder remains in off position. The rear panel should gasketed wire net guard for ventilation arrangement will be made of easy accessibility to each compartment by providing rear panel doors with locking system . The panel is to be properly gasketed to prevent the dust & vermin. All vertical bus bar chambers is to properly arrange and all electrical equipments are to be fixed by nuts and bolts on suitable Hylam board / porcelain insulators of adequate size and dimension. The outgoing feeder connection from respective switches are to be made at rear side of panel by means of busbar, copper multi core cables, to be terminated on bolted type terminals for cable connection or on bush insulators for bus bar connection. Each compartment will be providing with DMC/FRP board at back side.

Incoming Arrangement :

a) 415 Volts, 415A, TPN SFU with proper HRC fuse (open execution type) (Make: L&T/Legrand /Schenider /ABB /Siemens)- 1No.

Bus bar section :

415 V, 1000 Amp capacity 99.9% – 99.5% electrolytic tinned 4 bar copper bus bar mounted on non-hygroscopic porcelain insulator / hylam sheet having sufficient di-electric strength duly wrapped with colour PVC tapes (Red, yellow, blue & black) for phases & neutral identification- 1 set.

The busbar is to be rigidly supported on suitable non-hygroscopic insulating materials of robust ration to with stand electromechanical stress in the event of earth fault. All connection to bus to made by suitable nuts & bolts. The busbar is too wrapped with coloured PVC (Red. Yellow, Blue & Black) for colour identifications.

Outgoing Arrangement :