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If the neutral wire go pass through the core balance current
transformer? If yes then why? and no then why?

Answers were Sorted based on User's Feedback



If the neutral wire go pass through the core balance current transformer? If yes then why? and no ..

Answer / kj

The neutral is requiered to pass through the core balance
CT together with the phase for the same circuit. It
operates on the current going through the pahse being
balanced with the current returning through the neutral. If
these are balanced the protection will not operate. If a
fault occurs (a short circuit to earth in either the phase
or neutral)some current will flow through the earth to the
neutral and not go through the CBCT. This will then operate
the protection.

Is This Answer Correct ?    6 Yes 1 No

If the neutral wire go pass through the core balance current transformer? If yes then why? and no ..

Answer / rajevaibhav

If Current Flowing through the cable is balanced then
output of the CBCT through which the cable is passing is
zero. If you pass the Neutral through the CBCT and if fault
occurs then part of fault current will flow through the
Neutral which will also travel through the CBCT and CBCT
will not produce any output hence Protection will not
operate. Hence Neutral should not be passed through the CBCT

Is This Answer Correct ?    3 Yes 4 No

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