... :12KV 2. Rated current:630A 3. 6.3KA, 12.5KA,20KA 4.ZW8-12 Vacuum Circuit Breaker Company profile: China·ZheJiang ChangKai Electrical CO.,LTD was ... , testing certification. Right of self-supporting importing and exporting. Application:ZW8-12 outdoor high voltage vacuum circuit breaker is rated voltage 12KV, three-phase AC 50Hz ...