What is a ring main unit

A piece of switchgear in distribution systems .

KEMA - Ring Main Unit (RMU)

WikiAnswers - What is a ring main unit in electrical power distribution

Another practical everyday use is used in Britain and other European countries, in homes, starting with the Consumer Unit,

Consumer unit - Wikipedia, the free encyclopedia

Which feeds a Ring main, basically a ring of power cable that has plugin distribution outlets for lights, applainces, etc. all through the circuit.

Wiring a ring main, electrical wiring, wiring a circuit, electrical circuits, mains wiring

Rmu is a type of protective device ( switch gear ) that has two oil operated switch at its both ends and a t-off fuse that protect transformer

[B][B]Ring Main Unit. RMU used for H.T.side. RMU is having
3no.s of switches(Circuit Breakers or Isolators or LBS), it
Is used for two inputs with mechanical or electrical
Interlock and one outgoing to the load. Either one input
With two outgoings. RMU used for redundancy feeder's
Purpose.

MOSHARRAF