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vyral2311
Associate

Join Date: Mar 2013
Posts: 31

Neutral CT Insulation class

12/13/2013 6:20 AM

I have come across selecting the Neutral CT for transformer (132kV/33kV) for 33kV side. CT ratio has been finalised but its highest voltage level and insulation class are to be decided yet. Please help
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TonyS
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United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#1

Re: Neutral CT Insulation class

12/13/2013 9:06 AM

I'm sorry but if you have to ask a bunch of random guys on the net, should you be anywhere near a transformer of that size?

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PeterT
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Join Date: May 2010
Location: Liverpool, NY
Posts: 961
Good Answers: 131
#2

Re: Neutral CT Insulation class

12/13/2013 12:34 PM

Think about it this way:

If the transformer's neutral connection to ground were somehow to become disconnected so that it is no longer at ground potential, you could under some conditions have full 33kV potential across the CT's insulation to its physically grounded base. It will need to withstand that voltage if you want to keep the "magic smoke" in it.

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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#3

Re: Neutral CT Insulation class

12/13/2013 12:35 PM

You can do it.

We have faith in you.

Go for it!

Do your best!

Give it your best shot!

Success comes to those who work for it.

We're all behind you.

We know you'll succeed.

That's about all the help I can give you. Let us know when you've figured it out.
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