5. A REVIEW ON PROTECTION OF TRANSFORMER BY USING GSM

Power transformers are one of the most important electrical equipment that is used in power transmission system as they perform the function of transforming the voltage levels. Hence maintenance of power transformer is mandatory; as they are located at different geographical areas periodical monitoring is not possible all the time due to insufficient man power. Due to this reason transformer failure may occur which leads to unexpected power shutdown. To overcome this shutdown due to transformer failure we proposed a system for monitoring the transformer .The aim of our project is to monitor and protect oil level, temperature and voltage and current level of transformer without involving man power. If any critical condition occurs the SMS will be send to the control unit .This monitoring system consist of 89C52 micro controller, LM35 temperature sensor, level sensor, CT PT voltage and current sensor, GSM and LCD. The proposed hardware results are obtained using miniature model of transformer. Result obtained in the proposed system with suitable modification can be applied to the real time system.