The ACB sentinel and sentinel Energy air circuit breakers are 100% Hager made and offer customers a complete protection solution for their energy circuits, in absolutely any kind of building. This detailed How-to video shows you the simple process of locking in the disconnected, test or connected position of the circuit breaker in its chassis, and how to prevent inserting the racking handle. Did you know there’s a whole host of Hager How-to videos available for you? Discover them all on our channel!