Answer / ankur

RMU-Ring Main Unit
It consists of Isolator-Breaker-Isolator configuration.
The RMU is used in the 11 kV HT Power network.

The RMU is using SF6 gas for the arc quenching medium. All
the two isolator and one breaker are in the one chamber
having SF6 gas.

The breaker is having O/C and E/F protection using relays.
The isolator is being used for the operation on ON LOAD due
to the SF6 gas medium.

Answer / sunil jaiswar

RMU is used for redudancy feeder purpose with 2inputs
electrical interlock & one outgoing to the load

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Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks

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Hello, I am just preparing my self for a university interview and struck on the 11kv ring main unit system network. I just know that ring main unit has total three breakers, fuses and use to supply a power to any load/ building without any interrupt. But i am not be able to visualize the connections, either Ring main unit getting power from two different power sources? or there is always one feeder in complete ring circuit??? I would be highly thanks full of you help me.

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