New Generation Of Oilless Circuit Breakers 115 Kv-345 Kv II-The Interrupting System

The basic interrupting system of the new breaker line is of the modular concept. It utilizes the double pressure SF6 interruption technique which has been in service for over a decade, with the inovation of a downstream blast valve. This basic interrupting module can be utilized in various arrangements to allow ratings of 115 kV, 5000 MVA to 345 kV, 25000 MVA. This paper and its companion papersl, 2,7 will discuss the goals of performance, the method of operation and the results of the verification program for this interrupter.