Answer / perwez

it is a type of distribution system , where the load or
transformer are connected in a ring , when there is a power
failure frm one source the power can be restore frm the
other source in no-time in this type of distrubution a
special unit it connect called RMU( ring main unit)

Answer / tharan

ring.... are two incoming and one outgoing.... if any one incoming source problem r preventive maintenance another circuit we can do on manually....

Answer / revathi

this is one of the type of feeder(over head line) ie ring
main feeder.

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