ZW43-12 Outdoor AC High Voltage Vacuum Circuit BreakerDetailed product description：

ZW43-12 outdoor AC high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is an outdoor distribution equipment with a rated voltage of 12KV and three-phase AC 50Hz. Mainly used for breaking and closing load current, overload current, and short-circuit current in electronic systems. Suitable for protection and control in substations and distribution systems of industrial and mining enterprises, as well as places with frequent operation of rural power grids. It can also operate the segmented switch of the power grid, and after installing a controller, it can achieve distribution network automation.

ZW43-12 Outdoor AC High Voltage Vacuum Circuit Breaker Main Technical Parameters

serial number	project	unit	parameter
one	rated voltage	KV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty
four	Rated short-circuit breaking current	KA	twenty
five	Rated peak withstand current (peak)	KA	fifty
six	Rated short-term durability current	KA	twenty
seven	Rated short-circuit closing current (peak)	KA	fifty
eight	mechanical life	time	ten thousand
nine	Rated short-circuit breaking current breaking times	time	thirty
ten	Power frequency withstand voltage (1min): (wet) (dry) phase to phase, ground/fracture	KV	30/42/48
eleven	Lightning impulse withstand current (peak value) phase to phase, ground/fracture	KV	75/85
twelve	Secondary circuit 1-minute power frequency withstand voltage	KV	two

serial number	project	unit	parameter
one	Contact opening distance	mm	9±1
two	Contact overtravel	mm	2±0.5
three	Opening speed	m/s	1.0±0.2
four	closing speed	m/s	0.6±0.2
five	Contact closing bounce time	ms	≤2
six	Center distance between phases	mm	340±1.5
seven	Three phase opening and closing asynchrony	ms	≤2
eight	Resistance of each phase conductive circuit	μΩ	＜80
nine	closing time	ms	25~45
ten	Opening time	ms	23~45

ZW43-12 Outdoor AC High Voltage Vacuum Circuit Breaker