procurement of spares of meditron vcb at main substation block-b project , busbar spout - 800amp , part no . mv3309 , spring charging motor , part no . me4540 , indication lamp , part no . me4543 , ammeter , part no . mes4701 , voltmeter , part no . mes4702 , expoxy cast cbct-id-110 , part no . mer5330 , single phase rectifier / power pack-110 volt , part no . mer5340 , master trip relay , part no . mer5530 , degital energy meter 3ph 3 wire , mer5570 , negetive sequence voltage sensing phase failure relay and variable under & over voltage , part no . mer5590 , high speed tripping relay , part no . mdn8827 , under voltage relay , part no . mer5601 , over voltage relay , part no . 5602 , bushing with rod , part no . mv5603 , heavy duty epoxy resin cast potential transformer draw out type ratio-3 . 3kv/110 , part no . med2126 , hd resin casr current transformer 400/200/5a , part no . md2214