Ring Main Unit definition

Ring Main Unit means a metal-enclosed non-withdrawable switchgear assembly with an external metal enclosure and comprising two non-automatic ring main switch disconnectors and a switch-fuse combination tee-off connected in series by a non- extensible common busbar.
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Examples of Ring Main Unit in a sentence

  • Quantity (PCS) Within 2 years Material Description Stock Code 1 7 Indoor type Rated 33kV, Extensible, Motorized, very compact-sized, vacuum type interrupter, Ring Main Unit, with two rated 630 A main switch-disconnector and two rated 630 A Tee-Off fuse switch.

  • Pre-fabricated Sub-station (PSS) consisting of 11KV SF6 Ring Main Unit + Transformer + Low Voltage Switchgear with all connection accessories, fitting & auxiliary equipment in an Enclosure to supply Low-voltage energy from high-voltage system as detailed in this specification.

  • The high voltage equipment shall incorporate a Ring Main Unit rated 630A, 350 MVA for 3 seconds or similar equipment approved in writing by the Engineer, fitted with a suitable bracket with wooden clamping blocks, below terminals of switchgear, to clamp and support up to 185 mm² PILCDSTA cable for a 315 KVA and up to 185 mm² for 630 KVA and a SF6 or Vacuum breaker.

  • This specification covers the design, manufacture, inspection, testing, packaging and delivery of specified 11kV Ring Main Unit.

  • All operating handles shall be arranged for operation from the front of the Ring Main Unit at a suitable height, and all indicators and instruction labels shall also be visible from the front of the unit.