The prototype design consists of a PIC microcontroller programmed in C language, an LM35 temperature sensor, an electric fan and other diverse electronic component. employed in the outdoor oil natural and air cooled single or three phase distribution transformers rated between 200KVA to 5000KVA as a medium of cooling in the case of excessive temperature rise in distribution transformers. The unreliability and interruptions facing power supply from the excessive heat generated as a result of the inefficiency of oil cooling medium employed in distribution transformers The purpose of this project is to design and implement a prototype automatic temperature control system which if the ratings of the various components used in the prototype are advanced the resulting design could be.
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