24kV Ring Main Unit SF6 Gas Insulated Switchgear

Looking for a quality 24kV Ring Main Unit SF6 Gas Insulated Switchgear? Comewill factory offers a versatile, modular RMU solution. With a rated voltage up to 24kV and leakage rates below 0.25‰, our switchgear integrates vacuum/SF6 circuit breakers and 3-station load switches.

Product Advantages

Robot Laser Welding Technology: Unlike manual welding which is prone to microscopic fissures, our SF6 "airbags" (gas tanks) are sealed using precision robotics. This ensures a leakage rate of ≤0.25‰ per year, significantly exceeding standard requirements.

Long Electrical Life: Load Switches: Reach E3 level, the highest grade for frequent switching operations.

Circuit Breakers: Reach E2 level, ensuring robust short-circuit breaking performance without frequent contact replacement.

Environmental Resilience: With an IP67 rating, the primary high-voltage components are entirely protected against dust and temporary immersion in water, making 24kV Ring Main Unit SF6 Gas Insulated Switchgear perfect for humid coastal areas or dusty industrial plants.

Operational Safety: The gas pressure is strictly capped at 1.4 bar, and the 3-station load switch design ensures clear "Closed-Open-Earth" positioning, fully validated by type test reports.

Product parameters:

*SF6 insulation ring main unit
*Indoor medium voltage distribution switchgear
*Rated voltage: 3.3kV, 6kV, 10kV, 11kV, 12.5kV, 13.8kV, 15kV, 17kV, 22kV, 24kV, 33kV, 36kV, 40.5kV.
*Floor standing
*Annual leakage rate ≤0.25‰ per year
*SF6 gas pressure at 20℃ is 0.4bars(relative pressure)
*Standard: IEC, ANSI, GB

Outer assembly

Technical date of C cabinet

Available with 42kV power frequency withstand voltage

Technical date of F cabinet

1)         Limited by high voltage fuse-links
2)         Available with 42kV power frequency withstand voltage

Technical date of V cabinet

1)         Available with 42kV power frequency withstand voltage
2)         Depend on type of used bushing
3)         Interface A – 12,5kA/1s, interface B – 16kA/1s

Infrastructure diagram

FAQ

Q1: What is the maximum rated voltage for your RMU series? 

A: While our flagship model is the 24kV unit, our range covers 3.3kV up to 40.5kV to meet various international grid requirements. 

Q2: Can I choose between Vacuum and SF6 Circuit Breakers? 

A: Yes. In our "V" cabinet, we offer both options. Vacuum breakers are often preferred for their low maintenance, while SF6 breakers are available based on specific load and environmental needs. 

Q3: How do you ensure the gas pressure remains safe? 

A: We use a relative pressure of 0.4 bar (at 20°C) and a max limit of 1.4 bar. Each unit includes a pressure gauge with auxiliary contacts for remote monitoring and alarms. 

Q4: Is the equipment suitable for harsh outdoor environments? 

A: Yes. While the RMU is an indoor design, the core SF6 tank is IP67 rated. When housed in a proper outdoor kiosk (compact substation), it thrives in high-humidity or high-pollution areas.