... switch or branch switch in the power supply system, with the frequency of 50Hz, voltage of 1140V/660V and current ... of 200A to 400A. And also can be used as the large capacity motor ... vacuum circuit breaker is mainly composed of vacuum switch tubes, operating mechanism, protection plug-ins and ... 1140 (660)V,660(380)Vb)Rated working current;200,400Ac)Rated working system; long-termd)Max ...