Choosing the right current transformer method

- Jan 10, 2020-


In most places of application, the measurement accuracy of the current transformer determines the efficiency of the entire system. If the accuracy of the current transformer is high, then the test result is more accurate, and we do not need to repeat the test, saving time and improving effectiveness.


The linearity of the current transformer refers to the reliability and stability of its performance within the range of all actual operating modes. Especially under the condition of low current value, high linearity can ensure the accuracy of a wide range of measurements.

3. Drift

The drift of the current transformer is related to the time-out continuity of the irrelevant reading request of the original system calibration. The change of this characteristic is caused by the relative humidity and temperature of the surrounding air or excessive wear of components.


Because the current transformer is a self-sufficient self-powered system, the current transformer does not need all other wiring except the two output lines of the necessary output power monitor equipment.

5.Phase shift

In fact, the accuracy of the reasonable output power or kinetic energy measurement is not only related to the accuracy and linearity of the AC current and voltage transformers, but also to the phase shift that will occur in the middle of the accurate measurement of the 2 related values.


To take into account the price of current transformers, to ensure that the current transformers you purchase are cost-effective, you must confirm that the current transformers purchased at this price are worthless, and also include future maintenance and repair costs. The maintenance cost is less, so a little higher price is acceptable.