what is the meaning of Ring Mean Unit in a substation or trasformer also tell m

what is the meaning of Ring Mean Unit in a substation or
trasformer also tell me its oerpuse?

Question Posted / punilanil

4 Answers
50912 Views
NPTC, NTPC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?..

Answer / sreejim sreedharan

RMU (Ring Main Unit) is of two types. TRM (Triangular Ring
Main Unit) & QRM (Quadrilateral Ring Main Unit). TRM is (2
Feeder+ 1 Transformer Feeder) and QRM is (2 Feeder + 2
Transformer Feeder). RMU is mainly used for redundancy of
feeders. Sometimes it is difficult to get the Municipality
plot approval for a new Substation. In such cases we go for
a RMU as per requirement. There are 3 Feeder, 4 Feeder & 5
Feeder RMUs.

Hope it helps you. :)

Is This Answer Correct ?

116 Yes

4 No

what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?..

Answer / hesham

RMU IS used to feed the transformer from two different feeders within ring
1- TRM ( two incomer and one outgoing feeding only one transformer 2+1 )
Or ( 1+2 ) one incomer and two outgoing feeding two S/S.

2- QRM ( 2+2 ) two incomer and two outgoing feeding two transformer
or ( 1+3 ) one incomer and three outgoing feeding three s/s.

Is This Answer Correct ?

19 Yes

5 No

what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?..

Answer / shafi

RING MAIN UNIT IS DISTRIBUTION OF ELECTRIC POWER TO
DIFFERENT LOAD OR FEEDER, IT IS CONSISTS OF SF6 BAKER, ONE
INCOMMER AND TWO OUT GOING FEEDER

Is This Answer Correct ?

22 Yes

11 No

what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?..

Answer / nitin

root mean squar of a substation

Is This Answer Correct ?

1 Yes

41 No

Post New Answer

More Electrical Engineering Interview Questions

Why 11KV PT Secondaries [(11000/1.732)/(110/1.732)/ (110 / 3)]are in star connection ? And why the same should not be in delta ?

1 Answers

for a 132/33kv transformer secondary is star and is connected to NER. and from secondary a cable is running to 33kv swbd. since the cable is single core do i have to run neutral cable also to 33kv swbd.???

5 Answers PowerTech,

What is meant by the KA-rating of a circuit breaker? In this regard, discuss the stresses experienced by the circuit breakers

3 Answers

What is the difference between AC Drives and DC Drives?

14 Answers College School Exams Tests, La-Gajjar Machineries, LG, Schneider, SMEL,

any application of back emf

0 Answers MahaGenco,

How Can we calculate the rating of a cable?Show the formula?

2 Answers Jindal,

in dc machine airgap is there b\w stator and armature but by conduction emf is generated how & what is conduction

1 Answers

why the current leads voltage in the case of a capasitor