bids are invited for procurement of spares for automatic generation control ( agc ) system & ucbs from m / s bhel ( oem ) for koreshwar hep -- item 1 mcb 1p, 1a, spec: rated current in:1 a, rated voltage un: single pole 220v ( 230v ) / 400v ac item 2 fan tier rack for valmet ( top mounting ) item 3 switched mode power supply unit. usage: inside dcs control panels for system / field. normal input=220v dc / 230v ac, 1ph, 50hz item 4 diode ‘o’ ring module for parelling 2 numbers of 24v dc, 20amps smps for redundancy purpose item 5 ckt. bkr miniature with aux. contact blk 440v dc rtg: 4a 2p item 6 ckt breaker motor with aux contact blk rtg: 25 3p 690vac, 1no+1nc aux. contacts. overload release range: 1.6-2.4 a item 7 multi-function network firewall with 01 no. 10 / 100 base tx wan port, 4 nos. 10 / 100 base tx lan ports. firewall through put to be >=140 mbps concurrent sessions to be >=20000 one of the ports to be configurable as dmz / wan port to support item 8 industrial grade layer 2 fully managed ethernet switch with following specifications -16*10 / 100 base-tx ports. hardware should be included operating temperature: 0 to 70 degree centigrade -redundant power inputs ( 24v dc ) -input voltage range 18-30v dc item 9 ethernet switch 8x100 / 100 basety unmanaged item 10 transformer potential 30 va single phase, 50 hz secondary: 110 v secondary tap at 63.5 v primary: 63.5 v accuracy class: 1.0 insulation test voltage: 2 kv rms per min ref std: is 3156 total quantity : 10