DQF-40.5R Indoor Vacuum Load Switch-Fuse Combination Electrical ApparatusIntelligent Medium-Voltage Breakers
The DQF-40.5R is a new generation of combined electrical apparatus with domestic leading technology, developed using advanced foreign technology. It complies with GB16926, GB3804, and IEC60265-1.
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It is used in wind/solar power and urban grid projects as a ring main unit or terminal equipment. The vacuum interrupter is solid-sealed, separating the disconnector/ground switch from the fuse into two compartments for safe fuse replacement. It is compact, reliable, and designed for 40.5kV substations.
Core Advantages & Features
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Compact Reliable DesignNovel design, compact structure, long life, reliable operation, small size, easy maintenance, high safety.
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Safe Compartment MaintenanceDisconnector, ground switch, and fuse are in separate compartments for dead-switch repair.
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Reliable Current ProtectionBreaks rated/overload/short-circuit currents, prevents missing-phase operation, visible isolation break.
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Miniature Spring OperationMiniaturized spring operating mechanism with electric/manual charging and open/close operations.
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Comprehensive Misoperation PreventionComprehensive mechanical interlocking to prevent misoperation.
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High-Altitude CompatibilitySuitable for altitudes up to 4,000 meters.
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Technical Parameters
| Basic Parameters | ||
|---|---|---|
| Rated voltage | kV | 40.5 kV |
| Rated current | A | 630 A |
| Rated short-time withstand current | kA | 25 kA (2s) |
| Rated peak withstand current | kA | 63 kA |
| Mechanical life: load switch | 次 | 10000 times |
| Mechanical life: isolating switch | 次 | 2000 times |
| Mechanical life: grounding switch | 次 | 2000 times |
Rated current of fuse | A | 31.5 A, 40 A, 50 A, 63 A, 80 A, 100 A, 125 A |
| Rated short-circuit breaking current of fuse | kA | 31.5 kA |
| Handover current of combined electrical apparatus | A | 2000 A |
| Rated lightning impulse withstand voltage | kV | 185 kV |
| Rated power frequency withstand voltage | kV | 95 kV |
Product Documents
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Product Brochure
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DQF-40.5 Series Indoor Vacuum Load Swith-Fuse Cobination Electric Appliance
2025-09-02
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