Voltage transformers convert high voltage into low voltage proportionally, used to accurately transmit voltage information and achieve isolation between high and low voltage.

When using a voltage transformer, it is important to note that the secondary load of the transformer cannot be randomly selected, especially for magneto electric voltage transformers. The load must be configured according to the technical specifications provided by the manufacturer, otherwise it will affect the accuracy of use. Of course, the best state is zero load calibration and zero load operation. If the electronic circuit is connected later, users can easily establish a zero load working state.

Due to the high cost of traditional magneto electric voltage transformers, current type voltage transformers are often used to reduce costs.

Voltage transformers and power transformers may appear similar on the surface, but in reality, they have significant differences in structure and electrical characteristics due to their different uses. Simply put, transformers are used to transmit electrical energy, while voltage transformers are used to transmit voltage information.

Transformers need to output both rated voltage and current not exceeding the rated value, which requires the magnetic flux in the transformer core to work at the high end of the linear region, but cannot enter the saturation region. The selection of transformer winding wires is also based on maintaining a reasonable temperature rise under full load conditions, which ensures the efficient transmission of electrical energy by the transformer. However, the transformer cannot accurately transmit current, voltage, and phase information.

In order to accurately transmit voltage information, voltage transformers must minimize the excitation current for establishing working magnetic flux. The voltage for establishing excitation current is the main source of system error, which requires minimizing working magnetic flux. The design of magnetic circuit and winding must ensure that the iron core operates in a micro magnetic flux state. At the same time, it is necessary to use wires as thick as possible to reduce the error caused by the internal resistance of the wire package, which is another source of systematic error.