ZW7-40.5 outdoor AC high-voltage vacuum circuit br

ZW7-40.5 type outdoor vacuum circuit breaker is three-phase, AC 50Hz outdoor high voltage distribution equipment with 40.5kv rated voltage, which can be used to break and close load current, overload current and short-circuit current in the electric power system. It is used to protect and control the power distribution system in Transformer substation, Industrial and mining enterprises, and it is especially suitable for the transformation of the power network in rural and city. ZW7-40.5 type outdoor vacuum circuit breaker is mainly composed by vacuum arc chamber, transmission part, operation part and current part. The main body of this circuit is porcelain knob type. This product has the advantages such as good earthquake resistance, good switching performance, high credibility, simple structure, convenient repair and maintenance and long non-maintenance circle etc. NOItemUnitParameter1Rated voltagekV40.52Rated heat stability times43Rated currentA1600/20004Rated short time withstand current/4skA/s20/45Rated short circuit making currentKA50/63/806Rated short circuit breaking currentkA20/25/31.57Rated short circuit current breaking cyclestimes12/208Rated operate sequenceO-0.3s-CO-180s-O9lightning impulse withstand voltageKV185101min power frequency withstand voltagekV95/8011Switch-off current for rated capacitor groupA40012Mechanical lifetimes10000