VBI-12 Indoor High Voltage Vacuum Circuit Breaker (12kV Fixed Type)
Product Short Description (English)
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.
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