Answer Posted / 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. :)

how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

2396

---

what is earth pit , how we can measured it, what earth rods reference

2561

---

What is ideal IR values for ground and neutral.

1721

---

What should be the percentage increase in length of the dead end clamp for bus bar conductor (Hawthorn) after hydraulic pressing and what should be the applied pressure?

1900

---

what are the protecyion of transformer & generators

1932

---

difference between the applicability of nortons and thevenin theorem

2052

---

What was the Dg set radiator and lube oil temperatures trip in ACB

1791

---

How many types of losses occur in a transformer?

1117

---

why can we use cosine wave instead of sine in ac supply as both have same rms vale and ripple factor

2523

---

my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

2015

---

what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

1996

---

what is basic difference betmeen normal & flame proof motor??

1981

---

What is relation between mu(nought) and epsilon(nought)?

1504

---

Explain what is rated speed?

1094

---

at which voltage level arcing ground is occurs ??????????

2007

---