DQS-12 Gas-Insulated Ring Main UnitMedium-Voltage Switchboard
The DQS-12 is a next-generation, SF₆ gas-insulated RMU that combines a compact design with maintenance-free operation. It is ideally suited for urban grid upgrades, industrial substations, and compact substations where space and reliability are paramount.
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Compact size, maintenance-free, easy operation
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Primary circuit unaffected by environment, suitable for harsh conditions
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The modular design allows for flexible configuration and expansion based on specific project needs, offering a simple, secure, and high-performance switching solution
Core Advantages & Features
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Hermetically Sealed StructureAll live components are enclosed in stainless steel to ensure environmental immunity and safety.
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Compact and Space-SavingDesigned for easy installation in confined spaces.
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Precision Welding and ConstructionFabricated using TRUMPF laser welding for superior appearance and tightness.
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Leak-Free ReliabilitySEILER helium testing ensures <0.01% leakage per year and >30 years service life.
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Insulated Busbar SystemFully shielded design ensures safe and stable performance.
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Interlock SafetyMechanical interlocks prevent misoperation effectively.
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Durable MechanismLoad switch rated for 5,000 operations, circuit breaker for 10,000 operations.
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High Current Transfer CapacityHandles 12kV/1750A through load switch–fuse combination.
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Smart Factory IntegrationSupports intelligent automation and consistent production.
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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, V Unit: 630 A / 1250 A |
| Rated power frequency withstand voltage | 42 kV / 48 kV (isolation gap) |
| Rated lightning impulse withstand voltage | 75 kV / 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 |
| Main circuit rated short-time withstand current (4s) | 20/25 kA |
| Main circuit rated peak withstand current | 50/63 kA |
| Internal arc classification | AFLR, 20 kA, 0.5s |
| Rated working pressure (20°C gauge) | 0.03 MPa |
| Minimum working pressure (20°C gauge) | 0.02 MPa |
| Enclosure protection class | IP4X |
| Gas tank protection class | IP67 |
| Switchgear protection class | IP54 |
| Switchgear 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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