DQC-72.5 Eco-Friendly Gas-Insulated Digital SwitchgearMedium-Voltage Switchboard
The DQC-72.5 is an innovative switchgear that uses clean air as its insulating medium, making it an environmentally friendly choice. Its fully enclosed design isolates all live components, ensuring safety and reliability in demanding conditions. Primarily designed for application in offshore wind turbine towers, this maintenance-free product offers a sustainable and robust solution for specialized medium-voltage applications.
Core Advantages & Features
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High-Integration Compact GIS DesignOffshore Wind: 3-phase common-tank pressure vessel, 0.50–0.56 MPa air insulation. Integrated switching design, high space.
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Long-Life Breaker TechnologyExtended mech-electrical life: new tank-type vacuum circuit breaker. Adaptive solution for reliable current interruption/closing, enabling maintenance-free long-term operation in high-pressure offshore conditions.
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Use of Clean Air as Insulating MediumIt uses clean air insulation, mainly for offshore wind turbine towers.
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Technical Parameters
| Basic Parameters | |
|---|---|
| Rated voltage | 72.5 kV |
| Rated power frequency withstand voltage (1 minute) | Up to 160/160 (+42) kV |
| Rated lightning impulse withstand voltage | Up to 380/380 (+59) kV |
| Rated continuous current | Up to 1250 A |
| Rated short-time withstand current | Up to 31.5 kA |
| Rated peak withstand current | Up to 3s |
| Rated peak withstand current | 85 kA |
| Protection level | Up to IP54 |
| Internal arc classification | AFLR, 31.5kA/1s |
| Insulation medium | Clean air |
| Arc extinguishing medium | Vacuum |
| Annual leakage rate | <0.1% /year |
| Temperature range | -30~+55 |
| Corrosion resistance level | ISO12944 C5-M |
| Installation method | Indoor |
Product Documents
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Product Brochure
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DQC-72.5 Environment Friendly Gas Insulated Switchgear
2025-11-25
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