ZW8-12 outdoor high-voltage vacuum circuit breaker

ZW8-12 outdoor high-voltage vacuum circuit breaker ZW8-12 outdoor high-voltage vacuum circuit breaker is mainly used in three-phase AC 12kv and 50HZ power system. It can 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. The circuit breaker consists of conductive circuit, insulation system, sealing and the enclosure. the extinguish chamber external insulation is silicone rubber insulation. Inside the enclose the insulation part are isolated from air with anti-condensation design to improve the inside insulation level. NOItemUnitParameter1Rated voltagekV122Rated frequencyHz503Rated currentA6304Rated short time withstand current/4skA/s20/45Rated short circuit making currentKA40/506Rated short circuit breaking currentkA16/207Rated short circuit current breaking cyclestimes508Rated operate sequenceO-0.3s-CO-180s-O9lightning impulse withstand voltageKV75/85101min power frequency withstand voltagekV42/4811Rated peak value withstand currentkA40/5012Mechanical lifetimes10000