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ZN□-12(VKP) indoor side-mounted HV vacuum circuit breaker

  Model

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 ZN□-12(VKP) indoor side-mounted HV vacuum circuit breaker is the indoor equipment of three-phase, AC 50Hz, rated voltage 12KV which can be applies to industry and mining enterprises, power plant and substation as control and protect the electric equipments. The products comply with the standard of GB1984-20 (AC HV circuit breaker), JB/T3855-1999 (3.6-40.5 KV indoor HV vacuum circuit breaker, DL/T402-1999 (HV vacuum circuit breaker ordering technique) and IEC 6271-100:2001 (AC HV circuit breaker)

ZN□-12(VKP) side-mounted HV vacuum circuit breaker is fixed installed, which is used to fix the switch cabinet. The circuit breaker can be singly used, or can be used in ring net, packing substation and other non-standard power supply system. The circuit is long used, easy maintained, pollution-free, explosion-free, low noise.

  Technical parameters

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Serial No	Item		Unit
1	Rated voltage		KV	12
2	Rated frequency		HZ	50
3	Rated insulation level	Power frequency withstand voltage1min	KV	42
		Lightning impulse withstand voltage		75
4	Rated current		A	630	1000	1250
5	Rated short circuit drop-out current		KA	20	25	31.5
6	Rated short circuit making current (peak)			50	63	80
7	Rated withstand current (peak)			50	63	80
8	Rated short time withstand current (effective value)			20	25	31.5
9	Rated short circuit drop-out current and number			30
10	Rated short circuit duration		S	4
11	Rated operation sequence	Auto reclosing		O-0.3s-CO-180S -CO(rated short circuit drop-out current ≤31.5KA
		Non-auto reclosing		O-180s-CO-180S -CO(rated short circuit drop-out current ≤40KA
12	Mechanical endurance		numbers	20000
13	Rated single capacitor bank drop-out current		A	630
14	Rated capacitor bank drop-out current		A	400

The resistance parameters for the main circuit of circuit breaker

	Rated current	Rated short circuit drop-out current	unit	Parameters
Main circuit resistance	630A	20KA	μΩ	45
	1000A	20KA 25KA		45
	1250A	25KA 31.5KA		40

 

 

 

 

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