0.5 Class split core current transformer

A brief analysis of the accuracy of current transformers. Current transformers are important secondary equipment in power systems and are widely used in secondary circuits such as metering, measurement, and relay protection. In situations with high current or high voltage, we cannot directly use ammeters to measure the current size of the circuit.   1. Accuracy of current transformers for verification: 0.1S level. Error 0.1%, often used to verify the accuracy of metering-grade current transformers. 2. Accuracy of current transformers for measurement: 0.2S 0.5 level. Error 0.2% and 0.5%, used as the basis for electricity bill settlement, and 0.5 level is also used in some occasions 3. Measurement-grade current transformers: 0.5 level, 1.0 level, 2.0 level, etc., generally used for ammeters. 4. Accuracy of protective current transformer: 10P10, 10P20, 5P10, 5P20, etc. The meaning of accuracy: Taking 10P10 as an example, when the current flowing through the current transformer is within 10 times of its rated current, the error of the inductor is within ±10%. 5. In some special occasions, there are current transformers with higher accuracy, such as 0.005 level, 0.05 level, etc., which are used in fewer occasions.