bids are invited for 2000a, 12kv, siemens make vcb, type:3ak6 supply , installation and commissioning of 2000a siemens make draw type vcb type: 3ak6 with contact arms & trolley complete suitable for 8bk80+3ak6 board having panel width 800mm.the detail specification of vcb is as follows.vcb type: 3ak6-534a-aeea-aef2, rated voltage ur: 12kv, rated current ir:2000a. breaking capacity: 40ka for 3 sec, rated impluse withstand voltage:75kvp, rated short time power frequency withstand voltage:28kvp. the vcb shall be provided with elect spring charge indication limit sw with anti pumping contactor, aux switch of 12no+12nc, test service limit switch: 1no test+ 4no service.spring charging motor:110v dc, cc / tc: 110v dc, plug & socket : 64 pin, mech ( on / off ( ind+pb ) , ( cont+spr chrg ind ) . , 1250a,12kv,siemens make vcb,type:3ah5 supply ,installation and commissioning of 1250a siemens make draw type vcb type: 3ah5 with contact arms & trolley complete suitable for 8bk80+3ah5cb board having panel width 800mm. the detail specification of vcb is as follows. vcb type:3ah5 104-2 rated voltage ur: 12kv, rated current ir:1250a. breaking capacity: 25ka for 1 sec, rated impluse withstand voltage:75kvp, rated short time power frequency withstand voltage:28kvp. ( q3 ) total quantity : 2