Transformers also consume a certain amount of power when idle, mainly due to reactive power loss in the iron core and copper loss in the winding. The specific power consumption depends on various factors, such as the rated power, capacity, manufacturer and type of the transformer, as well as the installation location and working environment.
The iron core will generate magnetization loss under the action of an alternating magnetic field, which is related to the material, shape, and frequency of the alternating magnetic field of the iron core. The current in the winding will generate resistance loss in the coil, also known as copper loss. In idle state, due to no load, the current in the winding is very small, so the copper loss is relatively small.
However, please note that even if the transformer is idle, its power consumption cannot be ignored. Long term operation can cause energy waste and economic losses, therefore, no-load losses should be minimized as much as possible. Common methods for reducing no-load losses include selecting appropriate iron core materials, optimizing the shape of the iron core, and reducing winding resistance.
As for the specific power consumption value, it is difficult to generalize due to the specific parameters and conditions of the transformer. Suggest consulting the technical specifications of the transformer or consulting relevant manufacturers to obtain accurate no-load loss data. Meanwhile, the power consumption of transformers in idle state can also be determined through actual measurements.
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