DFW 12 outdoor hv ring main unit
The DFW-12 series outdoor high-voltage switchgear is a gas-insulated outdoor ring main unit developed and manufactured by the company using foreign technology, based on the characteristics of distribution networks in various regions of China and the practical situation of urban cable distribution network renovations.
Product Overview
The DFW-12 series outdoor high-voltage switchgear is a gas-insulated outdoor ring main unit developed and manufactured by the company using foreign technology, based on the characteristics of distribution networks in various regions of China and the practical situation of urban cable distribution network renovations.
The DFW-12 series outdoor high-voltage switchgear uses the SRM □ -12/24 series SF6 fully sealed, fully insulated ring main switchgear. This switchgear features modular design, expandability, full insulation, complete sealing, safety and reliability, and maintenance-free operation. It is suitable for any harsh environment and is widely used in industrial parks, residential areas, streets, airports, various buildings, and busy commercial centers.
The DFW-12 series outdoor high-voltage switchgear has standard voltage levels of 12kV and 24kV and can be equipped with expandable distribution network automation functions, enabling intelligent operation of the ring main unit and making the power grid stronger and smarter.
Core Advantage
- All live parts are enclosed in an SF6 gas tank, achieving full sealing and full insulation;
- Equipped with mechanical interlocks that meet the five-prevention requirements, preventing misoperation;
- Incoming and outgoing cables use fully insulated, fully sealed touchable connections, maximizing personal safety;
- The cabinet is equipped with a gas pressure monitoring device, enabling real-time monitoring of gas pressure during operation;
- A blast-proof pressure relief device is installed at the lower rear of the gas tank, verified by authoritative internal arc tests.
- Flexible incoming and outgoing line options, allowing left, right, and bottom entry (exit);
- Flexible combination options, allowing any combination between units with unlimited expansion;
- Built-in busbar expansion method is used to fully meet usability, economy, and aesthetic requirements;
- The design plan is flexible, capable of meeting on-site user requirements.
Technical Parameters
| No. | Name | Parameter |
|---|---|---|
| 1 | Rated voltage | 12 kV |
| 2 | Rated current | 630A |
| 3 | Frequency withstand voltage (phase) to ground | 42 kV/min |
| 4 | Lightning impulse withstand voltage | 75kV |
| 5 | Rated breaking current | 630A |
| 6 | Rated short-circuit opening and closing current (peak) | 50kA |
| 7 | Rated short-time withstand current | 25kA/4S |
| 8 | Rated peak withstand current | 50kA |
| 9 | Rated breaking capacitor current | 45A |
| 10 | Rated breaking inductor current | 16A |
| 11 | Full load breaking frequency | > 100 |
| 12 | Switching and closing machine operation times | 2000 |