DQM-40.5 Permanent Magnet Indoor High-Voltage Vacuum Circuit BreakerIntelligent Medium-Voltage Breakers
The DQM-40.5 is a leading domestic permanent magnet vacuum circuit breaker compliant with GB/T1984, DL/T403, and IEC62271-100. It is designed for frequent operation in harsh environments like power plants and heavy industries.
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It utilizes a patented monostable permanent magnet mechanism with a lifespan over 100,000 cycles and features strong anti-interference and low radiation.
Core Advantages & Features
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Compact StructureCompact 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 ControllerIntegrated intelligent controller.
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High Drive CurrentHigh closing drive current (up to 80A) ensures reliable operation.
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AC/DC Integrated DesignAC/DC type integrates capacitor charging and undervoltage tripping, simplifying secondary circuit design.
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High EMC CompatibilityPasses Level 4 EMC tests for high electromagnetic compatibility.
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Serialized InterchangeabilityHighly serialized and interchangeable with mainstream industry products.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 40.5 kV |
| Phase spacing | 300 mm, 400 mm |
| Cubicle dimensions | 1400 mm, 1680 mm |
| Rated current | 630 A, 1250 A, 1600 A, 2000 A, 2500 A, 3150 A |
Rated short-circuit breaking current (effective value) | 25 kA, 31.5 kA |
Rated short-circuit making current (peak) | 63 kA, 80 kA |
Rated power frequency withstand voltage | 95 kV |
Rated lightning impulse withstand voltage | 185 kV |
Rated short-circuit current breaking operations | 30 times |
| Mechanical life | 120000 times |
Product Documents
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Product Brochure
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DQM-40.5 Permanent Magnet Indoor High-Voltage Vacuum Circuit Breaker
2025-09-02
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