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:
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GB1984-2003: High-voltage alternating-current circuit-breakers.
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JB3855-1996: 3.6-40.5kV indoor AC high voltage vacuum circuit breakers.
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DL/T403-2000: 12kV-40.5kV HV vacuum circuit breaker ordering technical conditions.
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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.
Technical Parameters
| Item | Description | Unit | Data |
| Type | Insulating/Epoxy resin/Nylon poles | / | Upper or Side outlet |
| Clearance | Clearance between open contacts | mm | 11±1 |
| Overtravel | Contact overtravel | mm | 3±0.5 |
| Spacing | Interphase center distance | mm | 210±1 |
| Bounce | Contact closing bounce time | ms | ≤2 |
| Timing | Opening / Closing time | ms | ≤50/≤100 |
| Speed | Average switching / closing speed | M/S | 0.9–1.3 / 0.4–0.8 |
Ambient Conditions for Operation
To ensure optimal performance, the device should be installed in environments meeting these criteria:
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Temperature: Between $-10$°C and $+40$°C (Storage allowed at $-30$°C).
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Altitude: Below 1000m.
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Humidity: daily average ≤95%; monthly average ≤90%.
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Seismic: Earthquake intensity not exceeding 8 degrees.
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Environment: Free from fire, explosion, chemical corrosion, or severe vibration.
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