VTK-12KV Indoor Vacuum Generator Circuit Breaker

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The VTK-12/T3150-40(F) and VTK-12/5000-50(F) indoor vacuum generator circuit breakers, which are independently developed by our company, meet the demanding requirements of protecting the vacuum generator outlet. They have the following characteristics.

1. Our product has passed a full set of type tests in strict accordance with the GB/T 14824 -1993 "General Technical Conditions of the Generator Breaker" in Xi'an High Voltage Apparatus Research Institute;
2. It is equipped with a domestic arc chute with high cost-performance;
3. The spring operating mechanism adopted is reasonably designed and it has complete operating functions, high reliability, and little maintenance. It is integrated together with the circuit breaking device;
4. Our product has high breaking capacity, high closing stability, as well as high dynamic and thermal stability;
5. The copper outgoing line, dual soft connection conductive parts, and special cooling rack perfectly solve the heat problem caused by long-term operation at large current;
6. This VTK-12KV indoor vacuum generator circuit breaker is suitable for installation on the XGN-12 fixed type and KYN28A-12 withdrawable type switchgears.

VTK-12KV Indoor Vacuum Generator Circuit Breaker

Technical Parameters

No.	Item		Unit	Value
1	Rated voltage		kV	12
2	Rated frequency		Hz	50
3	1min Power frequency withstand voltage (rms)	phase to earth, phase to phase	kV	42
		between fractures		50
	Lightning impulse withstand voltage (peak)	phase to earth, phase to phase		75
		between fractures		85
4	Standard value of the system source's expected transient recovery voltage	Peak voltage	kV	22
		Reference time	μs	5.5
		Rate of rise	kV/μs	4
5	Rated current		A	3500	5000
6	Rated short-circuit breaking current		kA	40	50
7	Rated operating sequence		Close open-30min-close open
8	Rated short circuit making current (peak)		kA	110		137
9	Rated dynamic current (peak)			110		137
10	Rated thermal current			40		50
11	Rated thermal stabilization time		s	4		2
12	Times of breaking rated short-circuit current		times	8
13	DC component of the rated short-circuit breaking current			≥75% (80%)
14	Times of breaking rated load current		times	50
15	Rated short-circuit stepping-out breaking current		kA	20		25
16	Mechanical life		times	10000

Related Names
Electrical Circuit Breaker | Ground Fault Circuit Breaker | Mechanical Breaker

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