How does ELCB work when exist earth foult? and How does RCCB
work when exist earth foult?
- 1 Answers
- 8494 Views
- I also Faced
- E-Mail Answers
Answer Posted / m.s.srinivasan
Functioning of the RCCB as well as ELCB are the same.
A CT is used to measuer the difference of current in the
circuit being protected. For that all the 3 cores + neutral
of the circuit is passed thro' the CT. For a normal healthy
circuit, difference of the net current will be Zero. Hence
the CT will not sence any current. When the current passing
thro the CT finds a path thro' the some other way ( by
earth ) , an unbalance is created and the CT sences the
unbalance and actuate a trigger to stop the power flow.
The unbalance current over which the RCCB to operate is
given for individual device. Normaly this would be
30ma,100ma,300ma and the selection of the devices is based
on the application.
| Is This Answer Correct ? | 34 Yes | 6 No |
Post New Answer View All Answers
what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?
specify the inbuilt protections in DG
hwat type of motor is used in thermal gas turbine hydro nuclear power plants and why
Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?
what about electrical pannel.? What is meant by plc pannel.?
How we select the vector group of 3phase power transformer?
what is counter poise conductors
Define what is difference between fuse and breaker?
What is meant by system?
can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?
No load tap changing transformer working
Post possible questions for Power Factor Panel FAT / SAT
What is precision of a measurement?
what is gridrotor resistance starter
explain all the classes with example
