Locking device for circuit breaker comprises clamp fitting around lever to secure lever in off position during maintenance

摘要

The accessory for a modular electrical circuit breaker is intended to be fitted to the operating lever of the circuit breaker to lock it in a the off position. It comprises a U-shaped jaw which is able to fit around the operating lever of the circuit breaker preventing another person turning the circuit breaker on. u The accessory for a modular electrical circuit breaker is intended to be fitted to the operating lever of the circuit breaker to lock it in a the off position. It comprises a two arms (14,16) defining a U-shaped jaw which is able to fit around the operating lever of the circuit breaker. A screw (50) and a nut (52) are mounted in one of the two arms so that the screw may be moved in towards the operating lever, clamping the jaw on to the lever. One of the arms (14) has an extension making it longer than the other arm, so that once installed on the circuit breaker lever, the lever cannot be switched back to the on position. A further section of the accessory (12) extends from the jaw in order to provide a handle by which the unit may be picked up.