Design, Engineering, Manufacturing, Supply, Delivery at site of 420 KV, 2000A, SF6, Live tank Circuit Breaker with spring operated mechanism as per enclosed technical specification., Supply of Support structure for above Circuit Breaker, Supply of Terminal Connector for Al. IPS Tube as per technical specification, Dismantling of Existing Circuit Breaker for Retrofitting works, Erection, Installation, Retrofitting, Commissioning and Testing of above Circuit Breakers along with accessories in complete