How to choose a transformer

When selecting a transformer, the following aspects need to be considered:
Rated parameters: Select suitable transformer rated parameters based on the actual needs of the power system, including rated voltage, rated current, rated power, etc. Ensure that the transformer can operate normally under actual working conditions.
Accuracy level: The accuracy level of the transformer should be selected according to the specific requirements of the application. Generally speaking, for transformers used in billing measurement, products with higher accuracy levels should be selected to ensure the accuracy of measurement results.
Ratio selection: Select the appropriate transformer ratio based on the magnitude of the measured current or voltage. The selection of transformer ratio should ensure that the output value of the transformer is within the range of the measuring instrument or relay, and strive to operate between 60% and 120% of the rated value to improve measurement accuracy.
Installation environment: The transformer should be installed in a dry, ventilated, non corrosive gas environment, and avoid direct sunlight and mechanical vibration. At the same time, the heat dissipation of the transformer should be considered to ensure its normal operation.