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krishmenon02
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Join Date: Nov 2012
Posts: 4

Current Transformer Secondary Grounded

11/30/2012 11:49 AM

Dear All,

I have observed that usually one end of the CT is always grounded in wiring schematics,could you please advise me why this is done.
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truth is not a compromise
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Posts: 8006
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#1

Re: Current Transformer Secondary Grounded

11/30/2012 1:35 PM

It would be really difficult to get anything useful out of the secondary if both ends were grounded, so it makes sense to always just ground one.

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Carl Pugh
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Join Date: Jun 2009
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#2

Re: Current Transformer Secondary Grounded

11/30/2012 10:14 PM

If the secondary was not grounded and there was a short from primary to secondary, the secondary would be at the primary voltage.
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Anonymous Poster #1
#3

Re: Current Transformer Secondary Grounded

09/11/2015 12:48 AM

Hello,

1.Its secondary is grounded for the protection purpose. Like in the case of Insulation failure of CT and some times there is high voltage on CT secondary side due to less current on secondary side.

2.Other reason is to maintain zero potential ie to maintain potential difference.

Regards

Vikash
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vikashkumar
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Join Date: Sep 2015
Posts: 20
#4

Re: Current Transformer Secondary Grounded

09/14/2015 4:06 AM

Hello,

1.Its secondary is grounded for the protection purpose. Like in the case of Insulation failure of CT and some times there is high voltage on CT secondary side due to less current on secondary side.

2.Other reason is to maintain zero potential ie to maintain potential difference.

Regards

Vikash
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