Metering and protection CT

[bejoyengineer]

Is the difference between a protection and metering CT ,only in it's accuracy or are there some other differences. I have noticed that the CT for protection and metering will have the same CT ratio say 3600/5.soin that case the construction could be the same too. then how do they really make a difference in the accuracy when the ratio(3600/5) is the same for both??


(**************(Relay)********************-This is only for sorting purpose so that searching will be made easy*************************)

 

[jim dungar]

Is the difference between a protection and metering CT ,only in it's accuracy or are there some other differences. I have noticed that the CT for protection and metering will have the same CT ratio say 3600/5.soin that case the construction could be the same too. then how do they really make a difference in the accuracy when the ratio(3600/5) is the same for both??


(**************(Relay)********************-This is only for sorting purpose so that searching will be made easy*************************)

The accuracy, and therefore load handling ability (burden), usually comes from having more steel in the core, so relaying CT's, are usually physically larger and heavier.