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Answer Posted / praveen kumar gupta
RMU stands for Ring Main Unit having at least three
switches ( Breaker or isolator os load break switch)
connected with a bus with mechanical interlocking as per
system requirement.It can used upto 11KV with bus loading
capacity 630 A . Breaker may be of rating 200A or 630A as
per requirement. Two LBS can be used as two I/C and CB as
out going feeder or DT feeder as per requirement. In this
way O/G or DT feeder can be feed through second I/C if
supply from first I/C intruppted due to any reason. So RMU
reduce the supply ontrupption time.Many RMU's can be
connected in a ring mode in a distribution system.
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