Do transformers use power when not in use?
THE ANSWER IS Yes, power transformers consume power even when not in use, mainly due to losses in their core and windings. This is often referred to as "no-load losses" or "core losses". Regarding this factor, we have to test this issue during transformer testing. Yawei Transformer has a transformer test station below 550kv that can meet the testing requirements of most transformers.
The main factors that contribute to this power consumption include:
Eddy currents: induced currents in the transformer core that generate heat.
Hysteresis losses: energy lost due to the magnetism of the core material during magnetization and demagnetization.
Although these losses are relatively small compared to when the transformer is loaded, they still represent a continuous power consumption.
