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CT Ratio
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hastheknack
Post subject:
CT Ratio
Posted:
Thu Aug 19, 2010 9:16 am
Joined:
Fri Jan 08, 2010 5:55 am
Posts:
8
Location:
NH
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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richxtlc
Post subject:
Posted:
Thu Aug 19, 2010 9:21 am
Sparks Level
Joined:
Mon Nov 23, 2009 6:37 am
Posts:
51
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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jghrist
Post subject:
Posted:
Thu Aug 19, 2010 1:34 pm
Arc Level
Joined:
Wed Jun 04, 2008 9:17 am
Posts:
428
Location:
Spartanburg, South Carolina
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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hastheknack
Post subject:
Posted:
Mon Aug 23, 2010 7:05 am
Joined:
Fri Jan 08, 2010 5:55 am
Posts:
8
Location:
NH
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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