THE ANSWER IS Yes, 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.
