If load current is 70amps or 50amps what range of CT to install for ampere met

If load current is 70amps or 50amps what range of CT to
install for ampere metering

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If load current is 70amps or 50amps what range of CT to install for ampere metering..

Answer / maprayil

Always go for the CT primary suitable for about 40% higher
currents of the load current. So if the load current is
70A, you should opt for a CT primary of 98A, say 100A.
Secondary current rating of the CT will be dependent on the
input requirements of the measuring instrument (meter)/
Controller. Many such meters specially calls for an input
of 5A or 1A. Certain meters have the option to select 5A
or 1A input based on the secondary current of the CT.

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If load current is 70amps or 50amps what range of CT to install for ampere metering..

Answer / sreekar

i think u have to use 100/5A by considering initial load
currents.

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If load current is 70amps or 50amps what range of CT to install for ampere metering..

Answer / g.bhaskarrao

CT range is 70/5A because it caluculates min to max current