Design of online condition monitoring hardware device for SF6 circuit breaker

Objective of proposed paper is to introduce a condition monitoring device which will continuously monitor the state of CB on site. The CB suffers from various failures such as failure in control circuit, auxiliary coil failure, and various other mechanical failures. The maintenance of CB is done periodically which requires time, man power and cost. Also the breaker is removed for its maintenance, which needs another spare breaker which again adds to the total cost of maintenance. The online condition monitoring is done to avoid all these factors. In this paper a circuit is designed which will monitor the parameters of circuit breaker and will give a trip and alarm signal through relay. Thus online condition monitoring is the continuous monitoring, collecting, and analyzing the CB data to avoid the breaker from mal-functioning.