A wise move. Thanks for reassuring us.
A key point here is that an ACB of this type, is not something that you just operate without forethought. Even if you are skilled and familiar with the equipment, the procedure used needs to take account of the local conditions, maintenance status or lack of it, load being interrupted, prospect of closing onto a fault etc, all of which would be built into the risk assessment for the activity.
These things can be deceptive. They sit quietly for decades giving an impression of solid reliability, but without actually being called upon to perform their job and without the maintenance necessary to keep them ready to spring into action. Then, when someone finally presses the button and the neglected mechanism malfunctions, it erupts into a fireball.