East Central Railway Tender

Supply of RCCB current rating 63 Amp / in accordance with IS 12640-1) / 240 V, 50 Hz with 10 KA short circuit withstand capacity 63 A (DP) 300 mA cat No. DHRGCTDF300063 of Havells. Make- Havells , C&S, indoasian, L&T.

" Provision of Chemical earthing , Material shall be NABL Lab Tested with less than 0.12 Ohm - m resistivity confirming to IES 62561-7, Confirming to RDSO Specn. RDSO / PE / SPEC / PS / 0109 ( Rev. - ""0"" ) -2008 , Ammendment "" 1 "" or with latest Ammendment material shall be Granular From in size 0.1 mm to 0.3 mm and shall have water solubility of less than 51%, min. Qty.Requirement for 150 mm dia. of 3000 mm depth shall be 35 Kg. Bore size,: 150 - 180 mm dia.04 and 3000 mm depth , size of copper strip : 300 mm X 25 mm X 6 mm with 4 X 12 mm Hole shall be exothermically welded (As per IEEE 837 by NABL / ILAC Member Labs) to main earth Electrode for taking connection. The earth Chamber will be 300 X 300 X 300 mm (Inside dimension) as per IEC 62561 -5 or Latest of RCC Finish. The RCC Earth Pit Cover shall be pre casted with 8 - 10 mm GI Loop for handling and lifting purpose. As Per drawing attached. "

"Supply,Installtion and commissioning of earth Pit as per IS : 3043 with Copper Plate in size of Copper Plate 600 mm X 600 mm X 3 .15 mm. Electrode ( Place at a depth of 3.0 Mtrs ) , 2 Nos. Copper earth Flat of size 50 x 6 mm shall be bolted with the plate and will be drawn upto ground 02 level one 3 Mtrs. Long GI Pipe , Class - B , 25 mm dia with Funnel at the top shall be placed inside the puit for watering purpose altyernate layer of salt and Charcoal spreaded inside the Pit. earthpit shall be completed with necessary Civil works , like Brick Chambver , RCC Cover final covered with Medium dusty Cast Iron Hinged Cover of size of 400 mm x400 mm , with proper size of Nut & Bolts etc. as per site equirement. "