General Information : Type G6 Series

    SF6 insulated Ring Main Unit (RMU) for secondary distribution

  • Available in Indoor and Outdoor installation
  • Extensible on both sides
  • Motorised mechanisms, suitable for SCADA
  • Operates through stainless steel bellows, hence leak-free

  Applicable standards

Complies with IEC 62271-1 / 200, IEC 60265, IS 9921.

  • Ring Main System protection
  • As an RMU for secondary distribution
  • Transformer Feeder protection
  • Ideal for package substations
Product Features
  • Corrosion resistant, 3mm stainless steel arcing chamber
  • Mechanism outside gas chamber
  • Easily extensible on both sides
  • Breaking capacity assigned for outgoing load feeder
  • Needs no special cable termination
  • Compact and user friendly being SF6 insulated
  • Maintenance free
  • 3mm thick stainless steel gas tank makes it corrosion resistant
  • Motorized mechanism makes it suitable for remote operation
  • Metallic bellows used for positive no leak operation
  • It is extensible on both sides
  • Safety features:
    • Live line indicator
    • Earth switch interlocked cable chamber access
    • Earthing function after OFF function
    • Self powered protection relays


Parameters Unit G612 G624
Rated Voltage kV 12/15 24
Rated Frequency Hz 50 50
Rated impulse with stand voltage kVp 75/95 125
Rated one minute power frequency with stand voltage kVrms 28/38 50
Charging current Amps 630 400
Earth leakage fault Amps 95 95
No load cable Amps 30 30
Off load transformer breaking current Amps 16 36
Short circuit breaking current capacitive of tea off feeder kA 21 21
Making current capacity kAp 52.5 52.5
Short time rating kA/sec 21kA/3sec 21kA/3sec