• How to Use the Overload Capacity of Dry Type Transformers? The overload capability of dry type transformer The overload capacity of the dry type transformer is related to the ambient temperature, the load condition before the overload (initial load), the insu...
  • How to Maintain A Dry Type Transformer? Today's first-class dry-type transformer is primarily equipment that relies on air convection to cool. Therefore, it has good heat dissipation performance and excellent environmental applicability. Th...
  • Dry Type Transformer Cooling Method The dry mode of the dry type transformer is divided into natural air cooling (AN) and forced air cooling (AF). In the case of natural air cooling, the transformer can be operated continuously for a lo...

Power Transformer Winding

The power transformer is a static electrical device, which is used to transform a numerical value of alternating voltage (current) into other voltage (current) with same frequency or several voltage (current) in different value. The rated voltage of the secondary winding of a power transformer refers to the no-load voltage of the secondary winding when the primary winding is under the rated voltage.

When the transformer is at full load, the impedance of the primary and the secondary winding of the transformer will cause the voltage drop of the transformer itself, which is equivalent to 5% of the rated voltage of the power grid, so that the terminal voltage of the secondary winding is smaller than the no-load voltage. In order to compensate for the voltage loss in the line, the rated voltage of the secondary winding of the transformer should be higher than the rated voltage of the power grid by 5%. Therefore, the rated voltage of the secondary winding of the transformer is 10% higher than the rated voltage of the same-level power grid.

When the transformer is put into practice and the power supply radius is smaller, the voltage loss of the line can be ignored since the line is relatively short. At that time, the rated voltage of the transformer's secondary winding should be 5% higher than the rated voltage of the grid to compensate for the voltage loss of the transformer itself.