Protection Engineering Basics and Schemes Protection Engineering | Page 86

then we have metering CTs connection, again via Test
block, so you can check any time the Meter accuracy and
Metering CTs characteristics, remember that safety
factor it is the margin by which your metering CT is safe ,
here it is 5 which means up to 5 times of current the
metering CT will be safe to operate , for knowledge
please remember that saturation point of metering is
always less than the protection CTs.
below metering CTs, we have Protection CTs for Main-2
protection circuit via Test block. when CT is not in used
for protection or metering it must be short circuit by wire
or metallic jumpers , nowadays many test block are
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