What is meant by "useful current range" of a CT?
What is meant by "useful current range" of a CT?
(OP)
I have a note from a supplier about a CT supplied with a generator AVR that its ratio is 130:1 and its "useful current range" is 325-650 A. What is meant by this in terms of the 0-325 A range? Is the response non-linear in that region so it loses accuracy, or am I missing something?
Thanks,
EK
Thanks,
EK





RE: What is meant by "useful current range" of a CT?
I'm guessing you are not in the US, so I can't speak for the wording, but I do sumise those are the accurcy limits (for some given accurcy).
RE: What is meant by "useful current range" of a CT?
The "range" is the region where enough current is flowing to produce a "true" output but less current then will saturate the core which would stop the CT from producing the "true" output again.
Keith Cress
kcress - http://www.flaminsystems.com