12/24kV Indoor Vacuum Circuit Breaker, ZN63A(VS1)-12C

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This indoor vacuum circuit breaker is a high voltage switch device suited to three phase power systems with rated voltage of 12/24kV and frequency 50Hz, used as protection and control unit for power equipment. These vacuum circuit breakers are suitable for areas requiring frequent operations of rated operating current or multiple switching of short circuit current.

12/24kV Indoor Vacuum Circuit Breaker, ZN63A(VS1)-12C

Side-mounted indoor vacuum circuit breaker is provided in fixed installation, suitable for fixed switchgear. This circuit breaker can be used individually or used for ring distribution networks, substations or various power distribution systems.

Environmental Conditions Ambient temperature: up to 40°C, greater than -15°C; Relative humidity: daily average ≤ 95%, monthly average ≤ 90%; Altitude: lower than 1000 m; Earthquake intensity: ≤ magnitude 8; Areas without risks of fire, explosion, pollution, chemical corrosion and severe vibration; Technical Parameters

Item	Unit	Parameter
Rated voltage	kV	12	24
Rated current	A	630,125,016,002,000	630,125,016,002,000
Rated short-circuit breaking current	kA	20,25,31.5	20,25,31.5
Rated short-circuit making current	kA	50,63,80	50,63,80
Rated peak withstand current	kA	50,63,80	50,63,80
Rated short-circuit withstand current (4S)	kA	20, 25, 31.5	20, 25, 31.5
Power frequency withstand voltage	kV	42/48	65/79
Impulse withstand voltage	kV	75/85	125/145
Rated operating sequence		O—0.3s—CO— 180s—OO	0—0.3s—CO— 180s—00
Mechanical endurance	Times	10000	10000