Current transformer accuracy

2. Current transformer accuracy for metering: 0.2S class 0.5. The error is 0.2% and 0.5%, which is used for the settlement of electricity bills. In some occasions, 0.5 grade is also used.

3. Measurement level current transformer: 0.5, 1.0, 2.0, etc., generally used for ammeters.

4. Protection current transformer accuracy: 10P10, 10P20, 5P10, 5P20, etc., the meaning of precision: Take 10P10 as an example, that is, the current flowing through the current transformer is less than 10 times of its rated current, the inductor The error is within ±10%.


5. In some special occasions, there are more accurate current transformers, such as 0.005, 0.05, etc., which are less used.