Live Tank Vacuum Circuit breakers （40.5 kV）
Without CT or with integrated CT（Inside or outside installation）
ZW39 is a combined apparatus including an vacuum circuit breaker，The circuit breakers are available for single or three pole operation by spring operating mechanism，It is used to break rated current, fault current, or to switch electric lines, and thus realizes the controlling and protection of power system. It is capable of regular operation and also can be used as connecting circuit breaker. Integrated casting aluminum spring operating mechanism bring high reliability and safety.
Brief performance data
Rated current：up to 2500A
Rated Breaking current：up to 40kA
Rated operating sequence：O-0.3s-CO-3min-CO
Rated insulation level：According to the latest IEC 62271-1