WHAT IS RMU AND WHAT IS ITS FUNCTION AND HOW TODISCONNECT
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Answer Posted / asif.k64@gmail.com
Ring mains unit - RMU mainly used to provide dual supply to
a building, in case one supply fails building can be fed
through a stand by supply, change over usually happens
automatically.
It usually is on the HT side, and consist of a dry type of
transformer and protection system, In order to disconnect it
you should first close the incomer of HT breaker through
which RMU is fed.
Wait it's not over yet, you should ground the Incomer and
outgoing terminal of RMU to insure safety.
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