DQM-12 Permanent Magnet Indoor High-Voltage Vacuum Circuit BreakerIntelligent Medium-Voltage Breakers
The DQM series is a new generation of vacuum circuit breakers featuring a patented permanent magnet operating mechanism (PMMA). It meets GB/T1984, DL/T403, and IEC62271-100 for global use.
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It is ideal for frequent switching and harsh environments like power plants, metallurgy, and chemicals. The monostable, single-coil PMMA uses high-grade materials for a lifespan exceeding 100,000 operations and offers high anti-interference capability.
Core Advantages & Features
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Compact DesignCompact structure with a monostable permanent magnet operating mechanism.
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Superior PerformanceExcellent mechanical/electrical properties, overcoming drawbacks of spring and bistable magnet mechanisms.
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Integrated IntelligenceIntegrated intelligent controller.
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Reliable OperationHigh closing drive current (up to 80A) ensures reliable operation.
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Simplified CircuitryAC/DC type integrates capacitor charging and undervoltage tripping, simplifying secondary circuit design.
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High EMC RatingPasses Level 4 EMC tests for high electromagnetic compatibility.
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Serial InterchangeabilityHighly serialized and interchangeable with mainstream industry products.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 12 kV |
| Phase spacing | 210 mm, 275 mm |
| Cubicle dimensions | 800 mm, 1000 mm |
| Rated current | 630 A, 1250 A, 1600 A, 2000 A, 2500 A, 3150 A, 4000 A |
Rated short-circuit breaking current (effective value) | 25 kA, 31.5 kA, 40 kA |
Rated short-circuit making current (peak) | 63 kA, 80 kA, 100 kA |
Rated power frequency withstand voltage | 42 kV |
Rated lightning impulse withstand voltage | 75 kV |
Rated short-circuit current breaking operations | 30 times |
| Mechanical life | 100000 times |
Product Documents
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Product Brochure
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DQM Permanent Magnet Indoor High-Voltage Vacuum Circuit Breaker
2025-09-02
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