Verify that the window size on the CT is adequate for the motor wire or bus bar. Determine input resistance (burden) of the meter or transducer. Measure the distance from the current transformer to the meter or transducer. Refer to the CT wire length chart for the required VA rating and ...
The impedance (or resistance to current flow) is important and used to calculate the maximum short circuit current which is needed for sizing, circuit breakers and fuses. Impedance is expressed as a percent. This percentage represents the amount of normal rated primary voltage which must be applie...