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 Post subject: CT Ratio
PostPosted: Thu Aug 19, 2010 9:16 am 
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What does the following CT ratio feeding an 87T Differential Relay mean?
600/100-5

Do I use the 600 or the 100 as the primary ratio?


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PostPosted: Thu Aug 19, 2010 9:21 am 
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Location: Tampa, FL
hastheknack wrote:
What does the following CT ratio feeding an 87T Differential Relay mean?
600/100-5

Do I use the 600 or the 100 as the primary ratio?


How many leads are coming out of the secondary? It may be a multi-ratio CT. MR 600/5 conn 100/5.


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PostPosted: Thu Aug 19, 2010 1:34 pm 
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richxtlc wrote:
How many leads are coming out of the secondary? It may be a multi-ratio CT. MR 600/5 conn 100/5.


This is generally what the underlining means.


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PostPosted: Mon Aug 23, 2010 7:05 am 
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Thanks guys for the info. After some digging I found that it was a Multi-Ratio (MR) CT with the 100 lead selected.


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