Answer / kj

Usually a RMU is used to allow a feed of supply from 2
directions and tapping of to a transformer, etc.

Each of these supplies may have a number of RMU's in series
forming a ring. If a section of the feeder needs to be
isolated due to work or failure an RMU on each end of this
section can be opened without stopping any supply.

Answer / ramgopal gupta

two purposes 1.reduce voltage drop.2.increse the supply
reliability when fault occurs.

Answer / sanjeev kumat

need of RMU is to provide the uninteruptted power supply .
purpose of rmu is to make a ring of power supply network so that supply can be feed from 2nd source on failure of 1st source of power supply .
operating function of RMU (RING MAIN UNIT ) switchgear are closing , opening and to do earth to the ckt. .the funtion of rmu are very easily to operate . it consist mechanically interlocking and sealed tank containing sf6 gas . and provide very good factor of safety .

Answer / al mahmoodi

In addition the easiest way to make feeder sectional when cable fault occurs and arranged power supply backfeed

Answer / chokkalingam

RMU-Ring Main Unit has multiple power source which can switched "ON" alternatively. whenever there is a fault/break down in one circuit by the other source of power supply

Answer / kamal

1 when RMU connected to SCADA system we can detect line fault on the office room
2 AB Switch operation removed by RMU
RMU is nothing but AB Switch in simple word

Dear Brother can u tell the proper size selection of cable & the fault level calculation of braker, busbar etc. pls mail me at azeemk30@gmail.com

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