China Vacuum Circuit Breaker | Reliable Electrical Solutions

ZN63 (VS1)-12 is a 12kV indoor high voltage vacuum circuit breaker for industrial and mining enterprises, power plants and substations. It is designed for frequent operation, stable performance and easy installation, especially suitable for control and protection of high voltage power systems. It complies with several standards, such as IEC 62271-100 and GB 1984, and is able to operate within a temperature range of -40°C to +40°C, with a relative humidity of up to 95%, and is suitable for environments with an altitude of up to 1000 meters above sea level.

◆ Technical Parameters

1.1 Technical parameters

Item	Unit	Reference value
Rated voltage	kV	12
Power frequency voltage(when losing a circuit)	kV	Breaker 42
Rated insulation level Impulse withstand voltag(when losing a circuit)	kV	Breaker 75
Rated frequency	Hz	50/60
Rated current	A	630/1250/1600/2000/2500/3150/4000
Rated short-circuit breaking current	kA	20,25,31.5,40
Rated short-circuic making current (peak value	kA	50,63.80,100
Rated short-time withstand current	kA	20,25,31.5,40
Rated withstand current (peak value)	kA	506,380,100
Required operation sequence		0-0.3s-CO-180s-CO
Rated short-circuit duration	S	4
Times of making-breaking with the rated short-circuit current	Times	30
Mechanical life	Times	10000
Weight	kg	110

1.2 Mechanical Parameters

item	Unit	Reference value
Gap of contacts	mm	11±1
Contact overtrave	mm	3.5±0.5
Average making speed	mvs	0.6±0.2
Average breaking speed	m/s	1.1±0.2
Bounce time in contact making	ms	≤2
Non-synchronous making/breaking of contact	ms	≤2≤3(40kA
Resistance of the circuit of each phase	μ Q	≤80
Permissible total wear thickness of the moving/fixed contact	mm	3