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Seychelles SF6 Series Sulfur Hexafluoride Gas-Insulated Ring Main Unit Equipment
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Product Description
SF6 Series Sulfur Hexafluoride Gas-Insulated Ring Main Unit
Switchgear
I. Product Overview
This product series comprises complete sets of AC high-voltage electrical equipment rated for voltages between 12 and 40.5 kV and operating at a frequency of 50 Hz. Primarily designed for use in 12–40.5 kV power supply and distribution systems—such as secondary substations, switchgear stations, industrial and mining enterprises, urban residential complexes, airports, railways, tunnels, and high-rise buildings—the equipment serves as critical components for transmitting and distributing electrical energy. Additionally, these compact yet expandable, metal-enclosed switchgear units are widely employed in both commercial and industrial applications, as well as in automated distribution systems, offering a seamless blend of space efficiency and scalability.
The product meets the following standards:
GB3906, GB/T11022, GB/T16926, DL/T539, DL/T404
II. Model Designation
III. Operating Environment
1. The ambient air temperature does not exceed 40°C, with a daily average no higher than 35°C; the minimum ambient air temperature is -25°C.
2. The daily average relative humidity does not exceed 95%; the daily average water vapor pressure does not surpass 2.2 kPa; the monthly average relative humidity remains below 90%; and the monthly average water vapor pressure stays under 1.8 kPa.
3. Altitude not exceeding 2000m;
4. Seismic Intensity: 8 degrees; Horizontal Acceleration ≤ 0.4g, Vertical Acceleration ≤ 0.2g;
5. The surrounding air is not noticeably contaminated by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray.
4. Technical Specifications
| Project | Unit | Parameters | |||
| C Cabinet | V Cabinet | Cabinet F | |||
| Rated Voltage | kV | 12 | |||
| Rated Current | A | 630/1250 | 630/1250 | 125 | |
| Temperature Rise Test | 1.1r | ||||
| Rated 1-min withstand voltage at power frequency (to ground) | kV | 42 | |||
| Rated lightning impulse withstand voltage peak (to ground) | kV | 75 | |||
| Rated Short-Circuit Breaking Current | kA | 20(25) | 25 | 31.5 | |
| Rated Short-Circuit Making Current | kA | 50(63) | 63 | ||
| Rated Short-Circuit Withstand Current and Duration | 20(25)kA/4s | 25kA4s | |||
| Rated Peak Withstand Current | kA | 63 | 63 | ||
| SF₆ gas rated charging pressure (20°C) | MPa | a. 0.035 (630A) | b.0.4(1250A) | ||
| Annual Leakage Rate | a. ≤0.1% (Leakage rate in 630A) | b. ≤0.5% (1250A annual leakage rate) | |||
| Protection Level | IP41 (Cabinet Enclosure) | ||||
| IP67 (Air Box) | |||||
V. Structural Features
1. Two categories: fixed-unit cabinets and expandable-unit combinations;
2. A comprehensive "five-protection" interlocking system eliminates human error during operation;
3. Reliable safety relief channels to ensure the personal safety of operating personnel;
4. Can be equipped with electric, remote-control, and monitoring devices according to users' different needs;
5. The main circuit and the switch unit itself are sealed within a 304# stainless steel enclosure, ensuring maintenance-free operation and protection from external environmental influences.
6. The switchgear is easy to install and suitable for spaces with limited room as well as harsh environments.
Company Address:
No. 9 Qianfeng North Road, Shiji Town, Panyu District, Guangzhou City
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