SF6 Gas Insulated Metal-clad switchgear for MV Substation Distribution- 25.8 to 40.5kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | SF6 Gas Insulated Metal-clad switchgear for MV Substation Distribution- 25.8 to 40.5kV |
| Rated voltage | 27.5kV |
| Rated frequency | 50/60Hz |
| Maximum operating voltage | 27.5kV |
| Series | RGIS |
Description
The RGIS series of SF6 gas - insulated metal - clad switchgear is specifically designed for three - phase three - wire 50/60 Hz systems with a maximum voltage of 40.5 kV. With a rated voltage reaching up to 40.5 kV, it features either horizontally or vertically installed vacuum circuit breakers. The switchgear encompasses a comprehensive set of components like vacuum circuit breakers, meters, and relays.
Key Features
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Excellent Insulation Performance
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Reliable Arc - Extinguishing Performance
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Fully Enclosed Structure
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Modular Design
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Good Explosion - Proof Performance
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Perfect Anti - Misoperation Function
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Low Maintenance Workload
Technology parameters
| Designation of type | Unit | RGIS - G10 | RGIS - G20 | RGIS - G80 | RGIS - G90 |
|---|---|---|---|---|---|
| Rated voltage | kV | 25.8 | 40.5 | 40.5 | 27.5 |
| Rated power frequency withstand voltage | kV | 50 | 95 | 95 | 95 |
| Rated lightning impulse withstand voltage | kV | 125 | 185 | 185 | 185 |
| All voltage values apply for an insulating gas pressure, absolute, 20℃ | kPa | 110 | 110 | 110 | 110 |
| Rated frequency | Hz | 50/60 | 50/60 | 50/60 | 50/60 |
| Rated busbar current | A | up to 2000 | up to 1250 | up to 1250 | up to 1250 |
| Rated feeder current | A | 630/ 1250/ 2000 | 630/ 1250 | 630/ 1250/ 2000 | 630/ 1250/ 2000 |
| Rated peak withstand current | kA | 63 | 80 | 80 | 80 |
| Rated short time current 4 seconds | kA | 25 | 31.5 | 31.5 | 31.5 |
| Rated short circuit breaking current of circuit breaker | kA | 25 | 31.5 | 31.5 | 31.5 |
| Rated short circuit making current of circuit breaker | kA | 63 | 80 | 80 | 80 |
| Rated operating sequence | - | O - 0.3s - CO - 3min - CO | |||
| Closing time | ms | 75 | 60±5 | 60±5 | 60±5 |
| Opening time | ms | 60 | 40±5 | 40±5 | 40±5 |
| Insulating gas | - | SF₆ | |||
| Rated filling pressure, absolute, 20℃ | kPa | 130 | |||
| Minimum operating pressure, absolute, 20 ℃kPa | kPa | 120 | |||
| Rated data: Auxiliary voltage | V | 220DC /110-125V DC | |||
Device structure
Working Environment Conditions
| Environmental Parameter | Standard Value |
|---|---|
| Ambient air temperature — upper limit | +40 °C |
| Ambient air temperature — 24 h average | +35 °C |
| Ambient air temperature — lower limit | –25 °C |
| Altitude above sea level | ≤ 1 000 m |
| Relative humidity — 24 h average | ≤ 95% (at +40 °C) |
| Relative humidity — monthly average | ≤ 90% |
| Water vapour pressure — 24 h average | ≤ 2.2 kPa |
| Water vapour pressure — monthly average | ≤ 1.8 kPa |
| Solar radiation | ≤ 1 000 W/m² |
| Wind speed (outdoor) | ≤ 34 m/s (mild) |
| Pollution degree (indoor) | Class II |
| SF₆ gas decomposition products | ≤ 1 μL/L (SO₂F₂) |
Typical Application Scenarios
- Medium-Voltage Substation Distribution
- Industrial Plant Power Distribution
- Urban Rail Transit Power Supply
- Renewable Energy Generation (Solar/Wind)
- Data Center Power Distribution
- Commercial Complex Distribution
Reference Projects for RMU
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Rockwill RGIS Case Study and Gas Insulated Switchgear Project in GhanaFocusing on the demand for improved distribution network reliability in Ghana, 11kV R-GIS gas-insulated switchgear is adopted. Integrating advantages of compact design, weather-resistant protection and intelligent management, it adapts to limited installation space and complex tropical local environments. It supports the upgrading of regional power distribution infrastructure and realizes safe, stable, maintenance-free and efficient operation.01 Project Overview1.1 Project BackgroundGhana, as a
Documentation Resource Library RMU
FAQ for RMU
Yes. The switchgear encompasses comprehensive components including meters, relays, and control units, supporting intelligent grid control and automation. Compatible with SCADA and remote monitoring systems.
The fully enclosed SF₆ insulated structure isolates all live parts from external environmental impacts, ensuring low maintenance workload throughout the service life. SF₆ gas insulation eliminates dust, moisture, and corrosion concerns.
The RGIS features vacuum circuit breakers (horizontally or vertically installed) with an operating sequence of O-0.3s-CO-3min-CO. Closing time is 60±5 ms and opening time is 40±5 ms — providing rapid and reliable switching.
