is there any difference between protection C.T and measuring C.T?if yes then w

is there any difference between protection C.T and
measuring C.T?if yes then what is the difference?

Question Posted / tushar

4 Answers
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is there any difference between protection C.T and measuring C.T?if yes then what is the differenc..

ct used for protection has to carry full load current and
fault current.ct core shudnt get saturated while carryin
fault current.So the ct used for protection shud hav high
saturation factor.But ct used for measuring shud hav high
accuracy

Is This Answer Correct ?

17 Yes

4 No

is there any difference between protection C.T and measuring C.T?if yes then what is the differenc..

Answer / gunasekaran

protection ct is operating below the knee point voltage but
metering ct is operating almost saturation point.accuracy is
more in metering ct accuracy is not important under normal
condition. metering ct accuracy is 25%to 120% of the rated
current but protection ct is not like that suppose the ct
5P10 and 20VA burden 10times current in primary 5% error is
acceptable up to 10 times current it will feed 20VA burden

Is This Answer Correct ?

9 Yes

2 No

is there any difference between protection C.T and measuring C.T?if yes then what is the differenc..

Answer / d.lakshmi narayana

The difference of protection ct & measuring ct is the
protection ct secondary current is very accuracy .Ex 600/1A
ct is the sec current is Exactly coming 1A But metering ct
is not accuracy That same ct is coming Sec current is
0.98--0.97 A

Is This Answer Correct ?

2 Yes

4 No

is there any difference between protection C.T and measuring C.T?if yes then what is the differenc..

Answer / ahir ashish

protection ct is depand upon the ratio error and measureing
ct is depand upon phase angle error.

Is This Answer Correct ?

2 Yes

4 No

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