The SFX series is a ring main unit switchgear that uses epoxy resin as the main insulation medium. It encapsulates the main electrical circuit, such as the vacuum arc extinguishing chamber and its conductive connection, isolation switch, earthing switch, and main busbar, in a single or combined manner with epoxy resin to form one or several modules with certain functions, which can be recombined or expanded and have full insulation and full sealing performance. The surface that can be touched by humans is coated with a conductive or semi conductive shielding layer and can be directly and reliably grounded.
The rated voltage is 12 kV.
- Customized design solutions conform to high standards;
- Suitable for aggressive ambient conditions such as high altitude and extremely low temperature , without pollution or harm to the environment and human body;
- Adopting a hermetically sealed and insulated design, without any live parts exposed, it can operate for a long time in aggressive ambient conditions;
- A standardized and modular design structure that facilitates ring loop expansion, unit swapping, and scheme changes;
- Compact in size, providing following typical panels: VCB panel, Load switch panel, Rising Panel, Communication panel, PT panel, Metering panel;
- By using plug-in expansion busbars (top expansion or side expansion), free combination can be achieved with full modularity;
- Capable of achieving intelligent distribution;
Altitude
≤ 2000m (customized products of an available altitude≤ 5000m ).
Ambient temperature
-40℃ ～ +55℃
Ambient humidity
The average relative humidity within 24 hours shall not exceed 95%.
Installation conditions
There are neither explosive nor corrosive gases in the surrounding air. No severe vibration and impact in site. The pollution level does not exceed pollution degree 3.
Seismic Intensity
not more than 9 degree.
Special condition
support customized solutions
K unit
T unit
V unit
No. | Item | Unit | Load switch Unit K | Combination Unit T | VCB Unit V | ||
1 | Rated voltage | kV | 12 | 12 | 12 | ||
2 | Rated frequency | Hz | 50/60 | 50/60 | 50/60 | ||
3 | Rated current | A | 630 | 125 | 630 | ||
4 | Rated Insulation Level | 1 min Working frequency Withstand voltage | InterPhase, Phase-Earthing | KV | 42 | 42 | 42 |
5 | across the isolating distance | KV | 48 | 48 | 48 | ||
6 | Lightning impulse withstand voltage | InterPhase, Phase-Earthing | KV | 75 | 75 | 75 | |
7 | across the isolating distance | KV | 85 | 85 | 85 | ||
8 | ated short-term withstand current | kA/s | 20KA/4S | — | 20KA/4S | ||
9 | Rated Peek withstand current | kA | 50 | — | 50 | ||
10 | Rated shortcurcuit close-open current | kA | 50 |
| 50 | ||
11 | Rated short-curcuit close-open current | kA | 20 | 31.5 | 20 | ||
12 | rotective grade(Gas tank/whole panel) |
| IP41/IP41 | IP41/IP41 | IP41/IP41 | ||
13 | Standard Size |
| 600*868*1850 | 540*868*1850 | 440*868*1850 | ||
The SFX series is a ring main unit switchgear that uses epoxy resin as the main insulation medium. It encapsulates the main electrical circuit, such as the vacuum arc extinguishing chamber and it
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