What Happens When The Temperature Of A Dry-type Transformer Changes Drastically?

dry type transformer supplier During operation, the temperature is not constant. When the load, power grid conditions, or environmental factors change, the temperature of the internal windings and core will rise or fall. This rapid temperature change directly affects the condition of the internal materials and the overall lifespan of the equipment. Winding losses, electromagnetic losses, and heat generation are closely related; rapid temperature changes apply thermal stress to the insulation system, leading to accelerated material aging.

dry type transformer types Long-term operation of the windings and insulation materials at high temperatures accelerates the degradation of the insulating dielectric. Insulation aging reduces dielectric strength, increases the risk of short circuits, and may even cause insulation breakdown. Simultaneously, temperature fluctuations increase internal resistance, triggering additional heat generation. This feedback effect may create localized hotspots in a short time, further increasing losses.

The external environment also has a significant effect on the temperature behavior of dry type transformer winding. When ventilation is limited or airflow is insufficient, heat dissipation becomes difficult, and the temperature rise is more pronounced. Sudden changes in ambient temperature also alter the temperature field distribution of the unit, causing inconsistent thermal expansion in different internal parts and exacerbating the internal thermal gradient.