top of page

SAARA MV Ring Main Units - 15KV/24KV


SF6 gas insulated MV Ring Main Units are compact, with vacuum breakers, suitable for both indoor and outdoor applications


Designed, type tested & complying to latest IEC standards & GCC specifications


Specific features


  • User friendly, Simple design, very compact

  • Product complying to IEC62271-100, IEC62271-200 & IEC 62271-1

  • Circuit breaker with vacuum interruption

  • Circuit breaker & load break switches have motorized spring charge mechanism and manual operating option

  • Extensible on both sides

  • Motorised and suitable for remote operation & automation thro’ SCADA/RTU

  • Motorised earthing switch

  • Indoor / outdoor versions

  • Complete with CTs, PTs, Relays, Meters, Control & Indication devices fully wired up and ready to use

  • Cable access from the front

  • Available in multiple configurations



Ring Main System protection

Secondary distribution

Transformer Feeder protection

Package substations


Normal operating conditions


The rated characteristics of the switchgear are guaranteed under the following ambient conditions: 


•          minimum ambient temperature  :            –          5          °C

•          maximum ambient temperature :            +          50        °C

•          Ambient humidity                           :            maximum 24 h average of relative humidity 95%

•          The normal operational altitude is up to 1,000 m above sea level




SAARA RMUs comply with the following Standards: 



  • IEC 62271-1: High-voltage switchgear and controlgear: common specifications

  • IEC 62271-200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kA

  • IEC 62271-100: High-voltage switchgear and controlgear - Alternating current circuit-breakers

  • IEC 62271-106: High-voltage switchgear and controlgear - Alternating current contactors, contactor-based controllers and motor-starters

  • IEC 62271-103: High-voltage switchgear and controlgear - Switches for rated voltages above 1 kV up to and including 52 kV

  • IEC 62271-102: High-voltage switchgear and controlgear - Alternating current disconnectors and earthing switches

  • IEC 60255: Measuring relays and protection equipment - Common requirements

  • IEC 61869-2: Instrument transformers - Current transformers

  • IEC 61869-3: Instrument transformers - Inductive voltage transformers

  • IEC 60044-8: Instrument transformers - Electronic current transformers

  • IEC 62271-105: High-voltage switchgear and controlgear - Alternating current switch-fuse combinations

bottom of page