Ring Main Unit

A Ring Main Unit (RMU) is a totally sealed, gas-insulated compact switchgear unit. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers. Different combinations of these primary switching devices within the unit are commonly used

The Type GR-1 RMU is designed with a combination of innovation and state-of-art insulation principles & current interruption techniques. GR1 is available for 12kV which can withstand 20kA for 3 seconds. This outdoor design is safe to operate with the help of mimic diagram & position indicators to guide operators. All passive interlocks, comprehensive padlocks are designed for user friendly operations and are safe.


  • SF6 gas insulation & current interruption – No fire hazard
  • Maintenance free & sealed for life contact system
  • Outdoor installation
  • Robust construction
  • Tee-off circuit breaker with integral protection system
  • Low cost cable termination
  • Fully extendable options
  • Motorized mechanism