DQS-24 Gas-Insulated Ring Main UnitMedium-Voltage Switchboard
Independently developed by Daqo Group. Integrating advanced technical concepts and leading production technologies, it boasts compact size, maintenance-free, simple/safe/reliable operation and excellent performance. Ideal for power system urban network transformation, industrial distribution stations, load centers, high-rises, outdoor switchgears and cubicle substations.
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Small size, maintenance free, simple operation
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The primary part is not affected by the environment and can be used in severe environments
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Modular design, which can be arranged and combined according to the design plan for flexible expansion
Core Advantages and Features
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Sealed & ReliableHigh-voltage live parts sealed in stainless steel welded gas tank. Unaffected by external environment, ensures reliable operation, personal safety, and maintenance-free use.
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Compact ExcellenceCompact structure, easy to install in tight spaces.
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Long-Lasting SealingSEILER (German) automatic helium leak detection ensures <0.01% annual gas tank leakage and 30+ year service life.
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Safe Insulated BusbarsThe extended busbars are fully insulated and shielded, ensuring high reliability and safety.
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Safe InterlockingSimple and effective interlocking to prevent misoperation.
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Long Mechanical LifeReliable operating mechanism. The mechanical life of the load switch is up to 5000 times, and that of the vacuum circuit breaker is up to 10000 times.
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High Transfer CurrentThe transfer current of the load switch-fuse combination unit reaches 24kV 1400A.
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Intelligent AutomationCan provide factory automation solutions to realize the concept of intelligent switches.
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Consistent Product QualityFully automatic assembly line to ensure product consistency.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 24 kV |
| Rated frequency | 50 Hz |
| Rated current | C Unit: 630 A, F Unit: 125 A, V Unit: 630 A |
| Rated power frequency withstand voltage | 65/79 kV (Isolation gap) |
| Rated lightning impulse withstand voltage | 125/145 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 |
| Rated making current | C Unit: 50 kA, F Unit: 80 kA, V Unit: 50 kA |
| Rated transfer current | F Unit: 1400 A |
| Rated short-time withstand current of main circuit (4s) | 20/25 kA |
| Rated peak withstand current of main circuit | 50/63 kA |
| Internal arc rating | AFLR, 20 kA, 0.5s |
| Rated operating pressure (20℃ gauge) | 0.03 MPa |
| Minimum operating pressure (20℃ gauge) | 0.02 MPa |
| Enclosure protection class | IP41 |
| Gas tank protection class | IP67 |
| Switchgear protection class | IP54 |
| Switching station impact resistance class | IK10 |
| Annual gas leakage rate | ≤0.01% |
Product Documents
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Product Brochure
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DQS-12 kV, 24kV Series SF6 Gas-Insulated Ring Main Units
2025-11-25
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