CT rating
CT rating
(OP)
I am try to specify current transformers for the protection of a 25MVA hydro generator. Can somebody help me understand what the CT ratings mean? C400? C800? T400?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: CT rating
It's a quick answer, and you probally need to read more about it.
RE: CT rating
Also see attached link:
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Rafiq Bulsara
http://www.srengineersct.com
RE: CT rating
For high currents, the key to accurate current into the relay is how much secondary voltage the CT can produce before it saturates.
Keep in mind that for multi-ratio CTs, this accuracy rating applies ONLY to the maximum ratio. As you tap down, the accuracy goes down. So a 1200/5 C400 on the 600/5 tap is essentially a C200 accuracy, just as an example.
RE: CT rating
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RE: CT rating