DQK-12 Gas-Insulated Ring Main UnitMedium-Voltage Switchboard
The DQK-12 is a fully insulated SF₆ gas RMU designed for 12/24kV systems. It provides a compact, maintenance-free solution for urban power upgrades, industrial substations, and compact substations.
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Small size, maintenance-free, and simple operation
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The primary part is not affected by the environment and can be used in harsh environmental conditions
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Modular design, which can be combined according to the design plan, and is flexible in expansion.
Core Advantages & Features
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Fully Enclosed Stainless-Steel TankHigh-voltage components are enclosed in a welded stainless-steel tank, ensuring environmental immunity, safe operation, and maintenance-free performance.
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Compact & Reliable DesignConstructed from 3mm 304 stainless steel with 3D five-axis TRUMPF laser welding for superior airtightness and appearance.
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Low Leak Rate & Long LifespanSEILER helium testing guarantees a leak rate below 0.01% per year and a 30-year operational life.
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Fully Insulated Busbar SystemExtended busbars are fully insulated and shielded, ensuring high operational safety.
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Simple Interlock MechanismReliable interlocking prevents misoperation and enhances user safety.
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Durable Operating MechanismMechanical lifespan reaches 5,000 operations for load switches and 10,000 for circuit breakers.
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High-Performance Load Switch-Fuse UnitCapable of transferring 12kV, 1750A with consistent performance.
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Smart Factory IntegrationSupports automation and intelligent switching concepts with smart assembly ensuring consistency.
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Automated AssemblyFull-automatic assembly line ensures product consistency.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 12 kV |
| Rated frequency | 50 Hz |
| Rated current | C Unit: 630 A, F Unit: 125 A, V Unit: 630 A / 1250 A |
| Rated power frequency withstand voltage | 42/48 kV (Isolation gap) |
| Rated lightning impulse withstand voltage | 75/85 kV (Isolation gap) |
| Mechanical life | C Unit: 5000 times, F Unit: 5000 times, V Unit: 10000 times |
Rated short-circuit breaking current | F Unit: 31.5 kA, V Unit: 20 kA / 25 kA |
| Rated making current | C Unit: 50 kA, F Unit: 80 kA, V Unit: 50 kA / 63 kA |
| Rated transfer current | F Unit: 1750 A |
| Main circuit rated short-time withstand current (4s) | 20 kA / 25 kA |
| Main circuit rated peak withstand current | 50 kA / 63 kA |
| Internal arc classification | AFLR, 20 kA, 1s |
| Rated operating pressure (20°C gauge) | 0.03 MPa |
| Minimum operating pressure (20°C gauge) | 0.02 MPa |
| Enclosure protection rating | IP41 |
| Gas tank protection rating | IP67 |
| Switchgear protection rating | IP54 |
| Switchroom impact resistance rating | IK10 |
| Annual gas leakage rate | ≤0.01% |
The company consistently maintains robust innovative vitality, standing at the forefront of the industry and driving its advancement. Through cutting-edge technologies and products, it achieves goals of energy conservation, environmental protection, quality enhancement, and consumption reduction, continuously contributing to the development of a resource-efficient and environmentally friendly society.
