Dead Tank Circuit Breaker Design Techniques

A new dead tank circuit breaker has been developed with the manufacturing and testing advantages of the modular live tank circuit breaker concept. By locating the puffer interrupter inside the porcelain bushing it is possible to reduce the size of the single-phase breaker tank to the minimum required to support and insulate the main conductor and locate the circuit breaker bushings. Only one supporting insulator is used inside the tank for all the breaker components, and only one insulating operating rod bridges the gap from the tank to the main conductor. The rest of the insulation to earth is in gas and self-restoring.