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Standard instruction



FGRMU is a SF6 gas insulated switchgear ring main unit for the secondary distribution network. FGRMU can be supplied in 10 different configurations suitable for most switching applications in 12/24/36 kV distribution networks. It is have Non-extension and extension able modular compact switchgear, they represent a complete solution for 12/24/36 kV secondary distribution networks. FGRMU and FGRMU-plus have identical user interfaces. FGRMU is a completely sealed system with a stainless-steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system. The FGRMU concept offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. FGRMU can be supplied with an integrated RTU remote control and monitoring unit.

Service environment

a) Air temperature: Maximum temperature: +40℃; Minimum temperature:-20℃ b) Humidity: Monthly average humidity 95%; Daily average humidity 90% . c) Altitude above sea level: Maximum installation altitude: 2500m d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc. e) No frequent violent shake

Technical Data


Product Structure

Component Pictures
C unit configuration-Load break switch
F unit configuration-Load break switch+fuse
V unit configuration-Vacuum Circuit Breaker
Mechanism(Manual & Motor opional)

Front view of difference modular type