Method of de-rating the sense signal in circuit breakers employing air core sensors by gain compensation technique

摘要

A method of de-rating the sense signal in circuit breakers employing air core sensors by gain compensation technique is disclosed. In one implementation, a gain compensation technique for use in electronic trip unit of one or more circuit breaker employing a rating plug having a rating resistor, or set of resistors is disclosed. The gain compensation technique characterized by altering gain setting resistor value and a voltage divider resistor value in a signal conditioning circuit of said electronic trip unit.