How are precision current transformers used?

- Nov 02, 2020-

(A) Choose a precision current transformer to measure the current in the three-phase balanced route. The precision current transformer is selected based on the measurement range of the ammeter, and the measurement range of the ammeter is based on the specific value of the load current, which should account for 2/3 of the total output range of the ammeter to the middle of the full scale value. For example, if the rated voltage of a machine is 100A, choose an ammeter with a full scale value of 150A. At this time, the mutual inductance ratio of the precision current transformer should be 150/5A, and the ammeter with a ratio of 150/5A should also be selected for the ammeter. When reading the value, read directly with the indicated value in the table.

(B) Choose two precision current transformers and connect them in an incomplete star shape to measure the three-phase current in the three-phase balanced or unbalanced route.

(C) Choose three precision current transformers and connect them in a complete star connection method to measure the three-phase current in the three-phase balanced or unbalanced route.https://www.ctsensorducer.com/