Zhuhai Comking Electric Co., Ltd.

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CKVB-12/GC breaker

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Detailed Product Description

Is developed by independent By comking in the basis of similar products at home and abroad, is mainly used in power plants in 12kV power system, substations and distribution system control and protection; is particularly well suited to the requirements under the rated operating current operation or more frequently breaking and closing of places of short-circuit current, with very good performance.Adaptive counter-based products for KYN28, XGN2, GG1A and so on.

Technical parameters

Name		Units	parameters
Rated voltage		kV	12
Rated insulation level	Rated short-term tolerance to voltage	kV	42
	PeakLightning Impulse Voltage tolerance	kV	75
Rated Frequency		Hz	50
Secondary circuit voltage frequency tolerance		V	2000
Rated Current		A	630	1250		1600
4sRated short-term whithstand current		kA	25	25	31.5	31.5
Rated peak whithstand current		kA	63	63	80	80
Rated short-circuit breaking current		kA	25	25	31.5	31.5
Rated short-circuit closing current		kA	63	63	80	80
Rated cable charging breaking current		A	25
Rated capacitor current portfolio Closing		kA	12.5
Rated a single / back-to-back capacitor bank breaking current		A	630/400
Operation order			-0.3s--180s-
Mechanical life			20000
Breaking number of rated current (electrical life)			20000
number of Rated short-circuit current breaking			50
clearance between open gap		mm	11±1
overtravel		mm	3.5±1
Average closing speed		m/s	0.50.8
Average opening speed		m/s	0.91.2
closing time		ms	3570
opening time		ms	3050
Arcing time		ms	≤15
Contact closing bounce time		ms	≤2
Three-phase contact line at different periods of gate		ms	≤2
Dynamic and static contact allowed to wear a total thickness		mm	3