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jflan13
January 25, 2018, 05:08 PM
At what tap position would you expect to find a CO-2 relay set to when connected with 500/5 instrument transformers if it is to pickup at 200A?
seaborgium
January 25, 2018, 05:29 PM
At what tap position would you expect to find a CO-2 relay set to when connected with 500/5 instrument transformers if it is to pickup at 200A?

If the CT is 500/5, there will be 1A of secondary current for every 100A on the primary. If you wanted the relay to pickup at 200A you would set the tap for 2A.

2A secondary = 200A primary
jflan13
January 27, 2018, 11:10 AM
If the CT is 500/5, there will be 1A of secondary current for every 100A on the primary. If you wanted the relay to pickup at 200A you would set the tap for 2A.

2A secondary = 200A primary

Thank you for the help
mookmeister80
June 6, 2018, 10:04 AM
At what tap position would you expect to find a CO-2 relay set to when connected with 500/5 instrument transformers if it is to pickup at 200A?

2A