这是手册对AQB的说明，在第二段陈述，所有此类断路器都有手动开关将线路锁住，来应付过载或震动的状况。
The short circuit feature provided on AQB breakers consists of a short circuit trip element that is usually calibrated at the factory and is not easy to adjust. The best practice is to replace the element with a new one having the desired tripping characteristics. When tripped, the handle of the AQB breaker returns to a position between OFF and ON. In order to reset it, the handle must be pushed toward OFF first and then to ON. NQB circuit breakers are entirely manual in operation and open only when the handle is turned to OFF. They have the same arc-interrupting features as the AQB breakers.
All AQB breakers are provided with a manual means of holding them in against overload and they can be locked closed against overload or shock. The locking devices should never be engaged except when absolutely necessary to prevent opening due to shock.
The short circuit feature provided on AQB breakers consists of a short circuit trip element that is usually calibrated at the factory and is not easy to adjust. The best practice is to replace the element with a new one having the desired tripping characteristics. When tripped, the handle of the AQB breaker returns to a position between OFF and ON. In order to reset it, the handle must be pushed toward OFF first and then to ON. NQB circuit breakers are entirely manual in operation and open only when the handle is turned to OFF. They have the same arc-interrupting features as the AQB breakers.
All AQB breakers are provided with a manual means of holding them in against overload and they can be locked closed against overload or shock. The locking devices should never be engaged except when absolutely necessary to prevent opening due to shock.
