Thermal model for operation of arc furnace transformer in steel making plant in a climate of high humidity

Frequent damage to the copper windings of electric arc furnace (EAF) transformers has been observed in a climatic region with high relative humidity. Such damage is caused through the accumulation of heat inside the transformer. A model for simulating electricity and heat flow in an EAF transformer has been developed. The model has been validated by experimenting the operation of an EAF transformer in the Ahvaz Steel Making Plant. The results of analysis indicate that the simulation model can be applied in controlling the hot spot temperature of the transformer. This provides an appropriate means of increasing reliability of an EAF transformer and preventing further damage to its copper windings