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What is different between Metering CTs and Protection CTs?
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Answer Posted / rk
metering cts are desined not to record fault current i.e.
if ctr is Ex. 200/5 at a fault current of 2000amp the
secondary current would be still 5 amps not 50amp. reverse
is in prot cts it will serve 50amps if its ALF permits .
Metring CT are like acc class 0.5 etc Protn CTs have 5P10,
5P20etc i.e. it will maintain its ratio up to 20times the
the primary current (200amp)of ct.
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