CVT accuracy for different loads

[sadgol]

Hi everybody
As we know in IEC mentioned that because of keeping the accuracy,load of CVT should be 0.25% to 100% nominal burden of CVT anf If the load is less than 25% nominal burden,accuracy of CVT will reduce.I would like to know that is there any relashin beween load and accuracy,e.g if the burden of CVT is 10VA with accuracy 0.5+3p and our load is 1 VA,then according to IEC the accuracy will reduce,Is there any relation that shows us that how much accuracy reduced and what will be the accuracy in this case?

 

[Marmite]

See section 4.5 of the attached document. In particular figure 4.1 on page 62.

http://library.abb.com/global/scot/...E 9543 40-00en IT Application Guide Ed2.1.pdf

Regards
Marmite

 

[slavag]

Hi.
Please see attached thread on the topic.
thread238-243315
And of course read document is attached by Marmite.

Best Regards.
Slava