VBI-C-12KV Side Mounted Vacuum Circuit Breaker

The VBI-C-12KV vacuum circuit breaker is a high-performance solution for power systems, fully compliant with international and national standards:

GB1984-2003: High-voltage alternating-current circuit-breakers.
JB3855-1996: 3.6-40.5kV indoor AC high voltage vacuum circuit breakers.
DL/T403-2000: 12kV-40.5kV HV vacuum circuit breaker ordering technical conditions.
IEC62271-100:2001: High voltage AC circuit breaker relevant regulations.

As a side-mounted indoor unit, this circuit breaker offers a compact design and reliable performance for high-voltage distribution applications.

Item	Description	Unit	Data
Type	Insulating/Epoxy resin/Nylon poles	/	Upper or Side outlet
Clearance	Clearance between open contacts	mm	$3 \pm 0.5$
Overtravel	Contact overtravel	mm	$3 \pm 0.5$
Spacing	Interphase center distance	mm	$3 \pm 0.5$
Bounce	Contact closing bounce time	ms	$\leq 50$
Timing	Opening / Closing time	ms	$\leq 50$
Speed	Average switching / closing speed	M/S	0.9–1.3 / 0.4–0.8

To ensure optimal performance, the device should be installed in environments meeting these criteria:

Temperature: Between $-10$ °C and $+40$ °C (Storage allowed at $-30$ °C).
Altitude: Below 1000m.
Humidity: daily average ≤95%; monthly average ≤90%.
Seismic: Earthquake intensity not exceeding 8 degrees.
Environment: Free from fire, explosion, chemical corrosion, or severe vibration.

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