Answer / 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.

Answer / dhana sekhar

Distribution networks are normally formed by interconnecting
a number of ring shaped grids. Distribution transformers are
then connected to the system by T-offs. Instead of
specifying and selecting individual components required for
a T-off, the required components are frequently available in
an integrated package known as a ring-main unit (RMU).

Answer / ravikumar

Ring Main unit, its used at main input to the industries. having the voltage input of 11000 volts. its having two feeders from same sub stations. incase of one feeder fails we may turn on another feeder. high profiles industries & offices using SF6 type of RMUs.

Answer / pravesh mishra

rmu is ring main unit ,it is used in 11 kv under ground.the two 630 ampr.load break isolator the rmu shall be connected to the incoming and out going ends of the 11 kv ring system for the control of the 11kv ring distribution systenm .the 630amp.sf6 breaker of the rmu shall be connected to control ,protect and isolator the 11kv/433v didtribution x-former / ht consumers/connected through 11kv bunderground cable

Answer / a jalil

Ring Main Unit. RMU used for H.T.side. RMU is having
3no.s of switches(Circuit Breakers or Isolators or LBS), it
is used for two inputs with mechanical or electrical
interlock and one outgoing to the load. Either one input
with two outgoings. RMU used for redundancy feeder’s
purpose.

Answer / highvoltpower

RMU as an important part of secondary distribution substations. Ring main unit is a totallty sealed, gas-insulated compact switchgear unit.

Answer / wali bahadar khan

RING MAIN UNIT IS 2 TYPE NUMBER(1)RMU (MINERAL) OIL TYPE NUMBER(2)RMU SF6 GAS TYPE (SULFUR HEXAFLUORIDE)

Answer / vijay

rmu means ring main unit,it used for ht cables only it act as like isolator .

Answer / rahul mistry

ring main unit is used for power distribution and also use
for transformer procation in rmu there are three or fore
function inside one fn is incoming supply and other three Fn
for supply distribution

Answer / lobo

What is LBS meaning in Ring main unit.

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