| Brand | ROCKWILL |
| Model NO. | High Safety SF6 gas insualted Switchgear C-GIS for Power Distribution-12kV to 40.5kV |
| Rated voltage | 36kV |
| Series | RMC |
RMC is completely insulated SF6 gas insualted GIS switchgear which is also called RMC ring main unit. Which is in conformity with the standards the GB/IEC standard and the design of a high safety combined switch cabinets.
SF6 gas molecules have a strong electronegativity, which means they readily adsorb electrons to form negative ions under the influence of an electric field. This reduces the number of free charge carriers in the gas, making it difficult for current to flow, thus achieving insulation. When the applied voltage exceeds the dielectric strength of the gas, the gas will break down and discharge.
Opening Principle: When the circuit breaker opens the circuit, an arc forms between the moving and stationary contacts. The high temperature of the arc causes the SF6 gas to decompose and ionize, producing a large amount of plasma. Under the influence of magnetic and electric fields, this plasma rapidly diffuses and cools, leading to recombination and the extinction of the arc, thereby interrupting the circuit.
Closing Principle: When closing the circuit, the operating mechanism of the circuit breaker drives the contacts to close rapidly, establishing the electrical connection and allowing the circuit to be energized.
| No | Item | Unit | Data |
|---|---|---|---|
| 1 | Rated voltage | kV | 12/24/36/40.5 |
| 2 | Power Frequency withstand voltage Dry
|
kV
|
28/50/80/95
|
| 3 | Rated Current | A | 630/1250 |
| 4 | Rated short circuit breaking current (peak) | kA | 25/31.5 |
| 5 | Rated closed‑loop breaking current | A | 630/1250/2500(C/V) |
| 6 | Rated short time withstand time | S | 3 |
| 7 | Mechanical life | times | C/F(2000)V(10,000) |
Air temperature: ±40℃; Daily average ≤25°C.
Altitude above sea level: Maximum installation altitude: 4000m.
Wind: less than 35m/s.
Earthquake intensity: no more than 8 degrees.
IEC62271-200
IEC62271-100
GB/T 3804‑2017
GB3906-1991
GB/T 16926‑2009
GB/T 11022‑2020
Remark:
Fuse combined electrical follow IEC 62271‑105.
VCB unit according to IEC 62271-100/GB/T 1984‑2014.
The RMC is in conformity with GB and IEC standards, ensuring full compliance with international and national quality and safety requirements for medium-voltage switchgear.
Yes. The completely insulated design with high-safety combined cabinet construction provides exceptional operator safety. All live parts are enclosed within the SF₆ gas-insulated housing.
The fully sealed SF₆ gas-insulated structure ensures maintenance-free operation throughout the designed service life. No gas replenishment or internal inspection is required under normal conditions.
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