VBI-12 Indoor High Voltage Vacuum Circuit Breaker (12kV Fixed Type)
The VBI-12 Indoor High Voltage Vacuum Circuit Breaker is a high-performance 12kV component designed for three-phase AC 50Hz indoor power systems. Engineered for reliability in industrial mining, power plants, and substations, it provides robust control and protection for frequent operation environments.
Key Features:
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Versatile Compatibility: Perfectly suited for KYN28A mid-mounted handcart switchgear and XGN series fixed switchgear.
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Reliable Design: Features solid-sealed poles for enhanced insulation and stable performance under demanding conditions.
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Standard Compliance: Fully adheres to international and national technical standards:
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GB1984: High-voltage alternating-current circuit-breakers.
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JB/T3855: 3.6~40.5kV Indoor AC high voltage vacuum circuit breakers.
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IEC60056: High-voltage alternating-current circuit-breakers.
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DVr403: Technical conditions for ordering 10-35kV indoor HV vacuum circuit breakers.
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Product Overview
The VBI-12 Indoor Fixed Type Vacuum Circuit Breaker is a high-performance power distribution component designed for three-phase AC 50Hz indoor systems with a rated voltage of 12kV. Featuring a solid-sealed pole design, it is ideal for industrial enterprises, power plants, and substations requiring reliable control and protection.
Technical Specifications
| Main Technical Parameters | Unit | Value/Data |
| Rated Voltage | kV | 12 |
| Rated Current | A | 630, 1250, 2000, 3150 |
| Rated Short-circuit Breaking Current | kA | 20, 25, 31.5, 40 |
| Mechanical Life | Times | 10,000 |
| Rated Operating Sequence | / | O-0.3s-CO-180s-CO |
| Short-time Withstand Current (4s) | kA | 20, 25, 31.5, 40 |
Ambient Operating Conditions
To ensure long-term stability and safety, the following environment conditions are recommended:
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Temperature: Ambient temperature between -10°C and +40°C (Storage allowed at -30°C).
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Altitude: Installation altitude should not exceed 1000m.
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Humidity: daily average ≤95%; monthly average ≤90%.
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Seismic Resistance: Earthquake intensity not exceeding 8 degrees.
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Environment: Site must be free from fire hazards, explosion risks, severe pollution, chemical corrosion, and heavy vibration.
Selection details for VBI-12 Indoor High Voltage Vacuum Circuit Breaker (12kV Fixed Type)
To confirm the required vacuum circuit breaker configuration for your project, include:
- Rated voltage, continuous current and short-circuit breaking current
- Fixed or withdrawable arrangement, pole spacing and cabinet dimensions
- Closing/tripping and charging-motor voltages, secondary plug and interlocking interfaces
Drawings and quotation requirements
Send the model reference, application, quantity and destination country together with the relevant drawing or existing equipment information. Confirm the selected configuration against a model-specific drawing and ratings sheet before ordering; request the applicable test documentation for your project requirements.
Request model confirmation and a technical quotation · Compare related Vacuum Circuit Breaker / 12kV Vacuum Circuit Breaker.
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