RMU

Rating: 12kV, 24kV, 630A, 21kA 

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

 Advantages

  • 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

Application

  • 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

    KEY TECHNICAL DATA      
Parameter Unit Pane Type  
    MS 101-1 MS 101-12 MS 102-1 MS 103-1
Rated Voltage kV 12 12 24 36
Rated Current Amps 630/800/12
50/2000		 2000/3150/ 4000 630/800/1250/
2000		 800/1250/200/
2500
Basic Insulation Level kVrms/
kVp		 28/75
**35/95		 28/75
**35/95		 50/125 70/170 **
85/200
Short time current withstand test kA 25/40/50 25/40/50 25/31.5 25/31.5
Short circuit duration seconds Seconds 3 3 3 3
Symmetrical breaking current kArms 25/40/50 25/40/50 25/31.5 25/31.5
Making current kApeak 62.5/100/125 62.5/100/125 62.5/80 62.5/80
Rated Frequency Hz 50/60
Duty cycle   O-0.3s-CO-3min-CO
Degrees of protection IP Indoor – IP4X / Outdoor – IP55
Width X depth X height (min)approx. weight mm 800 X 1750 X 2000 1000X 1750X
2000		 1000X 1750X
2000		 1200 X2325 X
2000

**35kVrms/95kVp as an optional for 12 kV 
** 85kVrms/200kVp as optional for 36 kV