Medium Voltage Outdoor Vacuum Circuit Breaker, ZW32-12

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The outdoor vacuum circuit breaker is suited for three phase AC outdoor power distribution network systems with rated voltage of 12kV and frequency of 50Hz, capable of breaking and closing load current, overload current and short-circuit current. These outdoor vacuum circuit breakers are used to protect and control of electrical power in substations, industrial and mining enterprises, as well as cities and rural areas where frequent operations of electrical grid are required.

Medium Voltage Outdoor Vacuum Circuit Breaker, ZW32-12

This vacuum circuit breaker is featured by small size, lightweight, condensation resistance and maintenance-free operation, it can perform well in harsh environmental conditions.

Environmental Conditions Altitude: lower than 3000 m; Ambient temperature: -40°C ~ 40°C; Daily temperature variation 25°C; Wind speed: not exceeding 35m/s; Areas without risks of fire, explosion, pollution, chemical corrosion (such as various acids, alkalis or dense smoke, etc.) and severe vibration; Technical Parameters

Item	Unit	Parameters
Rated voltage	kV	12
Rated frequency	Hz	50
Rated current	A	630
Rated short-circuit breaking current	kA	20, 25
Rated peak withstand current	kA	50, 63
Rated short-time withstand current	kA	20, 25
Rated short-circuit making current(peak)	kA	50, 63
Mechanical endurance	times	10000
Power frequency withstand voltage(1min)	kV	42/48
Lightning impulsewithstand voltage(peak)	kV	75/85