MBS current transformer accuracy check
误差试验一般采用被测互感器与标准互感器进行比较，两互感器的二次电流差即为被测互感器误差。 MBS current transformer error test generally compares the measured transformer with a standard transformer, and the secondary current difference between the two transformers is the measured transformer error. This test method is called the comparative method. Standard transformers are required to be two levels higher than the transformers being measured. At this time, the errors of the standard transformers are negligible. If the standard transformer is only one level higher than the measured transformer, the error of the test result at this time should be considered plus the error of the standard transformer.
The secondary current difference between the measured transformer and the standard transformer is generally measured by a transformer calibrator. Read the ratio difference fx (%) and phase difference δx (') directly from the transformer calibrator. Because the transformer calibrator measures the ratio of the current difference between the measured transformer and the standard transformer to the secondary current, the requirements for the transformer calibrator are not high. What level of transformers can be verified is basically determined by standard transformers.
Standard MBS current transformer is the key core of the transformer calibration system. To verify the transformer under test, in addition to the standard transformer and transformer calibrator, there must be a current booster that provides primary current to the transformer, a voltage regulator that can adjust the current of the current booster, and the load.
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