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Which ciass CT can be use in diff. protection. Can be use
5p20?
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Answer Posted / amit khamesra
Conventionally only PS class CT shall be used for unit
protections. But now a days, with the use of miro processor
based relays having facility of low impedance or biased
differential protection, 5P20 may be used as biasing in the
relay takes care of the unmatched characteristics of the
both side Cts.
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