China Vacuum Circuit Breaker(VCB)12KV 24KV 36KV Side-mounted VCB Manufacturer and Supplier

Vacuum Circuit Breaker(VCB)12KV 24KV 36KV Side-mounted VCB

Short Description:

BKV3 (VS1)- 12 side-mounted vacuum circuit breaker is an indoor high-voltage switchgear for three-phase power system with rated voltage of 12 kV and frequency of 50 Hz. It is used as protection and control electric appliance due to special vacuum circuit breaker. Superiority, especially suitable for frequent operations requiring rated current or multiple short-circuit currents.

The BKV3(VS1)-12 type side-mounted vacuum circuit breaker is fixedly mounted and is mainly used for fixed switchgear. The circuit breaker can be used alone or in ring power supply, box type or various non-standard power supply. system.

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Environmental conditions:

Altitude: the altitude does not exceed 1000m;
Ambient temperature: no higher than +40℃, not lower than -25℃;
Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;
Earthquake intensity: no more than 8 degrees;
Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration

The main technical parameters:

NO	Item			Units	Technical parameters
1	Rated voltage			kV	12
2	Maximum working voltage			kV	12
3	Rated current			A	630/1250	630/1250		630/1250
4	Rated short-circuit breaking current			kA	20	25		31.5
5	Rated short circuit closing current			kA	50	63		80
6	Rated peak withstand current			kA	50	63		80
7	4S rated short circuit withstand current			kA	20	25		31.5
8	Rated insulation level	Power frequency withstand voltage (before and after rated breaking)		kV	42(Fracture:48)
		Impact withstand voltage (before and after rated breaking)			75(Fracture:84)
9	Rated operation sequence				0-0.3s-Co-180s-Co
10	Mechanical life			times	10000
11	Rated short circuit current breaking times			times	50
12	Operating mechanism rated closing voltage (DC)			V	110,220
13	Operating mechanism rated trip current (DC)			V	110,200
14	Contact stroke			mm	11±1
15	Overtravel (contact spring compression length)			mm	3.5±0.5
16	Three-phase split and close bounce time			ms	≤2
17	Contact closing bounce time			ms	≤2
18	Average opening speed			m/s	1.2±0.2
19	Average closing speed			m/s	0.6±0.2
20	Opening time		At the highest operating voltage	s	≤0.05
			At the lowest operating voltage		≤0.08
21	Closing time			S	0.1
22	Main loop resistance of each phase			μΩ	60		50
23	Dynamic and static contacts allow wear cumulative thickness			mm	3