Impact of electric utility and customer modifications on existing medium voltage circuit breakers

The authors discuss seven factors that can increase circuit-breaker duties at existing installations and provide detailed analyses of possible corrective actions to alleviate the breaker overstressing problem, with special reference to the National Institute of Health's system. They emphasize a need for cooperation between large customers and the utility to obtain a mutually beneficial solution to the problem and prevent the recurrence of similar problems in the future.<>