SRM -12 Full- Gas Insulated RMU is indoor cabinet type AC metal sealed switching device, with AC 10kV and 50/60Hz.lt is suitable for distribution systems, ring power supply and biradial power supply system in factories, workplaces, residential high-rise buildings, it possesses functions of receiving, distribution and protection. It can also be used in the prefabricated substation.
Ambient Temperature: No more than +40℃, No less than 40℃ Average temperature no more than +35℃ within 24 hours.
Altitude: No more than 2000m.
Relative Humidity: the average daily value is no more than 95%, the average monthly value is no more than 90%.
Earthquake Intensity: No more than 8 degrees.
Vapor Pressure: the average daily value is no more than 2.2kPa, and the average monthly value is no more than 1.8kPa.
Installation locations without fire, explosion danger, serious pollution, chemical corrosion and violent vibration.
Fully sealed design, all 10kV switches and busbar electrified bodies are sealed in the gas box welded by 3mm stainless steel plate, and the silicon rubber cable plug is applied to achieve the full insulation seal of the cable head, so that it is not affected by external environment such as dust, humidity and small animals.
The switching device has a perfect “five-preventions”, with simple and clear operation procedures.
Modular design. Each unit module can be combined and extended arbitrarily, which is an easy to scheme combination, with a wide applicable range.
Big capacity for feeder line, small occupation, suitable for a variety of needs, wide range of applications.
Equipment maintenance-free, highly reliable performance.
| Content | Unit | C Module | F Module | V Module | CB Module | ||
| Load Switch | Load Switch with Fuse | Vacuum Switch | Disconnector/Earthing Switch | Vacuum Switch | Disconnector/Earthing Switch | ||
| Rated Voltage | kV | 12 | |||||
| Rated Frequency | Hz | 50/60 | |||||
| Power Frequency Withstand voltage in 1 min | kV | 42/48 | |||||
| Lightning impulse Withstand voltage (Peak) | kV | 75/85 | |||||
| Rated Current | A | 1250/630 | Note1 | 1250/630 | — | 1250/630 | — |
| Rated Closed Loop Breaking Current | A | 630 | — | — | — | — | — |
| Rated Cable Charging Breaking Current | A | 10 | — | — | — | — | — |
| Rated Short Circuit Making Current | A | 50 | 80 | 50 | 50 | 63 | 63 |
| Rated Peak Withstand Current | kA | 50 | — | 50 | — | 63 | — |
| Rated Short Circuit Breaking Current | kA/3S | 20 | — | 20 | — | 25 | — |
| Rated Short Circuit Breaking Current | kA | — | 31.5 | 20 | — | 25 | — |
| Rated Transfer Current | A | — | 1700 | — | — | — | — |
| Max. Rated current of fuse | A | — | 125 | — | — | — | — |
| Loop Resistance | μΩ | ≤300 | ≤600 | ||||
| Mechanical Life | times | 5000 | 3000 | 5000 | 2000 | 5000 | 5000 |
Note1: Depends on the rated current of the fuse.
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