If the neutral wire go pass through the core balance current transformer? If ye

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

Question Posted / aritrasaha1722

2 Answers
11732 Views
I also Faced
E-Mail Answers

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 ..

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

Post New Answer

More Electrical Engineering Interview Questions

Dear Respected sir how to test ABB REX521 protection relay by relay tester.

0 Answers

will the introduction of capacitor bank parallel with the induction load reduce power consumption

4 Answers Nokia, WAPDA Water and Power Development Authority,

In case of 11kV dual delta bank what are the recommended protections with specific CT / VT requirements? The capacitor bank is to be connected to the main 11kV switchgear from where the H.V.Motors and auxiliary 440V loads.

1 Answers

why buchholz relay is kept on inclined position and why it is cover??

1 Answers GSECL,

how to select power and control contactor .

1 Answers Bhel,

how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?

1 Answers ONGC,

what is inrush curent.

5 Answers BARC,

How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers S V Sugar,

whta does the middle finger stands in flemings left hand rule

3 Answers

what is difference between KW and KVA

1 Answers

i need to calculate high voltage line power factor daily basics but there is meter reading kwh and kvah while calculating power factor kwh/kvah formula was right. for examble there is point c=13kwh c=1.8 lag c=1.2 lead and c=14.5kvah like that i know that p.f =kwh/kvah but c=1.8lag kvarh and c=1.2lead kvarh points i dont know if u know please reply

1 Answers

How many types of Transformer testing..

1 Answers

For more Electrical Engineering Interview Questions Click Here