when voltage increases then current also increases then what is the need of ov

when voltage increases then current also increases then what is
the need of over voltage relay and over current relay?
can we measure over voltage and over current by measuring current
only?

Question Posted / javadkv

1 Answers
6608 Views
I also Faced
E-Mail Answers

when voltage increases then current also increases then what is the need of over voltage relay and..

Answer / nithi

NO.We can't sense the over voltage by just measuring the
current only.because,
The current increases not only for over voltages but
also for under voltage(As most of the loads are non-linear
in nature).
So,the over voltage protection & over current
protection are completely different.

over voltage relay meant for sensing over voltages &
protect the system from insulation break down and firing.

over current relay meant for sensing any internal
short circuit,over load condition ,earth fault thereby
reducing the system failure & risk of fire.

So, for a better protection of the system,It should have
both over voltage & over current relay.

Is This Answer Correct ?

15 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

what are all types of cross section in AC cables?

0 Answers

in DG synchronization system can i short R,Y,B- phase(DG-1) to R,Y,B Phase (DG-2), HOW IT WORK . WHAY WE NEED TO SYNCHRONIZATION.

1 Answers

IN SINGLE PH TRANSFORMER IF LEKAGE IMPEDANCE DROP IS NEGLECTED ,THE FLUX IN THE MAGNETIC CORE and the lekage flux linking a winding are a)proportional to the applied v to the winding i respectively.

0 Answers

What is the type of feedback used in an op- amp schmitt trigger?

0 Answers

working principal of online ups

0 Answers Delta Power Systems,

WHAT IS THE DIFFERENT BETWEEN MCB & MPCB? & HOW IS USE?

3 Answers Gandour,

How to distinguish between the armature wires with the field wires of a Dc motor ?

5 Answers

why we are using R,Y,B colours for 3 Phase ?

4 Answers ITC Infotech,

upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

0 Answers ABC,

i want all question & answers of the written exam

1 Answers Essar, L&T, MES, RRB,

what may the reason for vector shift in a generator?

0 Answers

Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!

0 Answers

For more Electrical Engineering Interview Questions Click Here