Ring Main Unit

DESCRIPTION

iRing family JEES M6 Ring main unit is factory-assembled, type-tested (KEMA, Netherlands according to latest IEC standards), 3-pole metal-enclosed single-busbar switchgear for Indoor and outdoor installation. This model is the principal unit in which two ring switches and a tee-off circuit breaker accompanied by a disconnector switch are contained in a common tank. The units are locally manufactured and assembled in production facilities in United Arab Emirates.

The ring switches are fault-make load-break enclosed in SF6 gas, with 3 operating positions: ON, OFF and EARTH. The circuit breaker operates on the proven rotating arc principle, comprises of vacuum interrupters and has 2 operating positions: ON & OFF. The disconnector switch is a fault-make load-break switch like the ring switch with ON, OFF & EARTH position.

All the mechanisms, like ring switch and circuit breaker, selector slots and operation slots are mounted outside the gas tank and therefore readily accessible. Access is protected by a hinged weatherproof & lockable door.

Ring Main Unit
  • 17.5 kV and 630 Amps ratings
  • Metal enclosed unit for indoor/outdoor installation & type tested.
  • Developed according to latest international standards (2018).
  • VCB Equipped with Vacuum interrupters of ABB make.
  • Switch disconnector to earth tee-off part of the unit.
  • Ring switch & disconnector enclosed in a SF6 gas insulated stainless steel tank (grade 316L), sealed for life.
  • Ring switches & disconnector switches are all 3 position switches (ON/OFF/EARTH).
  • Integrated earth and test facility for easy and safe cable test.
  • Auxiliary powered relay protection available.
  • Optional Actuators (motorized) for circuit breaker & ring switches.
  • Ideal integration with DMS network for remote operation and control
  • 100% safe to operate in powered up condition.
  • Clear indication of operation status via mimic diagram on front panel.
  • Voltage presence detector to check the presence of voltage in the cables.
  • Safety interlocked operation mechanisms with optional padlock facility.
  • Stainless steel enclosed tank is hermetically sealed, which means that the tank is independent of environmental effects such as dirt, small insects, and moisture and so on.
  • All switching operations can be made safely to personnel with the interlocking system that operates automatically according to the switch position by the operator.
  • Individual units and unit blocks can be freely combined and extended.

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