Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... H

Dear All, Pls let me know about ELR.... CBCT is using for
singnal purpose... How it works.. any body can explain
pls.......

Question Posted / mohanbabublr

4 Answers
15398 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any bo..

Answer / gururaj dambal

ELR Earth Leakage Relays along with CBCT are used to detect
leakage current in the earhing. If the earthing is not
proper a small amount of current will appear (in the order
of mA). ELR will continuously monitor the leakage current
if it exceeds the set threshold an output electromechanical
relay (which is inside the ELR) will operate. The output
relay contact can be connected to circuite breakers /
contactor to isolate power supply or alarms.

CBCT Core Balance Current Transformers these will come in
different sizes. the core material will be either nickel or
alloy of nickel, copper wire will be wounded on the core
and properly insulated. The 3-phase line along with neutral
are passed in this core and secondary is connected to ELR.
Idealy the leakage current should be zero if any earth
leakage happen the leakage current will appear at CBCT
secondary it will be detected by ELR.

Is This Answer Correct ?

36 Yes

3 No

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any bo..

Answer / sumitgarg

May i knoe there full form plz.

Is This Answer Correct ?

3 Yes

2 No

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any bo..

Answer / santosh

I agree with you. But exactly is the functionality of CBCT as compared to ELR, since ELR will be used to detect the leakage currents.

Is This Answer Correct ?

0 Yes

1 No

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any bo..

Answer / s.murugan kumar

CBCT is used for current leakage purpose via earth.If any
leakage current goes to any equipments (For example:Busduct)
it will be by pass that the leakage current to earth.So it
will act some relay.This is the CBCT purpose.This is not a
signal purpose this is protection purpose of any equipments.

Is This Answer Correct ?

1 Yes

2 No

Post New Answer

More Electrical Engineering Interview Questions

Why power genaration in India is at 50HZ while America its 60HZ

0 Answers TATA,

Whats the principle of lightning? How protection against lightning is achieved? Types of protection? How to select the height of lightning spike? as per the area.

4 Answers HAL,

what is the difference b/w permitivity and permeability

1 Answers

Compare jfet’s and mosfet’s.

0 Answers

what is the difference between Miniature circuit breaker & motor control circuit breaker ?

4 Answers

WHAT IS THE DIFFERENCE BETWEEN A DC MACHINE OUTPUT AND RECTIFIER OUTPUT...

3 Answers Cesco, NTPC, RRB,

Differentiate between Low and High impedance Protection

1 Answers

why power factor is important?

6 Answers Dalkia, MGC,

WHAT IS EDDY CURRENT LOSSES AND SKIN EFFECT LOSSES IN ELECTRICAL ENGINEERING

1 Answers GAS,

Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

0 Answers

diff between UPS and inverter?

2 Answers

Tan delta point in transformer to be earth or not?

1 Answers DMRC,

For more Electrical Engineering Interview Questions Click Here