 
VD4/S type indoor high-voltage vacuum circuit breaker is an AC three phase 50Hz indoor high-voltage switching equipment with rated voltage of 24kV, mainly applied for protection and control in power distributi on system of power plant, electric substation and industrial and mining enterprise,It is especially applied for breaking of important load and place requiring frequent operation.
 The circuit breaker equipped with permanent magnetic operating mechanism of long service life, its mechanical life can get to 100,000 times, which is suitable for place with extremely frequent operation.
 The assembled structure design makes the circuit breaker can not only be used as a fixed unit but also as mid-cabinet unit when it is equipped with chassis.

Item	Unit	Parameters
Rated Voltage	KV	12	24	40.5(36)
Rated Frequency	HZ	50/60	50/60	50/60
Lightning Impulse Withstand Voltage	KV	75/95	75/95	75/95
Power Frequency Withstand Voltage 1 Min(Dry/Wet)	KV	48	65	95/118
Rated Current	A	630-4000A		630-2500A
Peak Withstand Current(peak)	KA	50/63/80/100		50/63/80
Rated Short Time Making Current	KA	50/63/80/100		50/63/80
Rated Short Time Withstand Current(4s)	KA/S	20/25/31.5
Rated Cable(line) Charging Breaking Current	A	50 and 10
Rated Short Circuit Breaking Current	A	20/25/31.5/40
Rated Single Capacitor Bank Switching Current	A	400		600
Rated Operating Sequence	Mpa	O-0.3S-CO-180S-CO
Mechanical Life	Times	10000
Operation of Mechanical Stability	Times	6000

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High Voltage Switchgear Vacuum Circuit Breaker Indoor VD4 12kV 13.8kV 20kV 24kV 35kV

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