ZW20-12 Common Tank Outdoor High-Voltage Vacuum Circuit BreakerIntelligent Medium-Voltage Breakers
The ZW20-12 is a leading domestic, common tank outdoor vacuum circuit breaker compliant with GB/T1984 and DL/T403. With added CTs, PTs, and FTUs, it enables protection and automation features.
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It is designed for 12kV overhead line grids. It uses a three-phase common tank design with SF₆ gas insulation. The sealed, explosion-proof tank is maintenance-free. The miniaturized mechanism ensures low operating power and high reliability.
Core Advantages & Features
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Flexible OperationElectric/manual energy storage and open/close, locally or remotely.
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Low Operating Power and High ReliabilityMiniaturized mechanism with low consumption and high-performance bearings.
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Maintenance-Free DesignSealed structure protects all internal components from the environment.
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Incoming and Outgoing Line MethodsSilicone rubber sleeves provide UV resistance, sufficient insulation, and excellent external performance.
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Explosion-Proof SafetyFor safe operation, an explosion-proof device is fitted on the tank top.
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Multi-Function ConfigurableCan be equipped for protection, reclosing, and remote communication functions.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 12 kV |
| Rated frequency | 50 Hz |
| Rated current | 630 A |
| Rated short-circuit breaking current | 20 kA, 25 kA |
| Rated short-circuit making current (peak) | 50 kA, 63 kA |
| Rated short-time withstand current (4s) | 20 kA, 25 kA |
| Rated peak withstand current (peak) | 50 kA, 63 kA |
| Mechanical life | 10000 times |
| Rated current breaking operations | 10000 times |
| Rated short-circuit breaking current operations | 30 times |
| Power frequency withstand voltage (1min) phase-to-phase, phase-to-earth/isolation (dry test) | 42/48 kV |
| Power frequency withstand voltage (1min) phase-to-phase, phase-to-earth (wet test) | 34 kV |
| Lightning impulse withstand voltage (peak) phase-to-phase, phase-to-earth/isolation | 75/85 kV |
Product Documents
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Product Brochure
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ZW20-12 Outdoor High-Voltage AC Vacuum Circuit-Breaker
2025-09-02
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