Circuit breaker with tamper indicating calibration means

Details Circuit breaker with tamper indicating calibration means Circuit breaker with tamper indicating calibration means

H - Electricity

01

H

H01H 37/52 (2006.01) H01H 37/08 (2006.01) H01H 71/06 (2006.01) H01H 71/16 (2006.01) H01H 71/74 (2006.01)

Patent

CA 2045853

A circuit breaker with a thermal trip has a calibration opening in the electrically insulating housing through which a tool may be inserted and rotated to distort a support plate on which a bimetal is mounted to calibrate the thermal trip after the circuit breaker has been fully assembled and enclosed within the insulating housing. A tamper indicating seal in the form of a destructible film secured over the calibration opening by an adhesive having an adhesive strength exceeding the tensile strength of the destructible film provides a visual indication of any subsequent attempts to tamper with the calibration setting.

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