At one point on this machine the 30HP 3 phase 460 volt motor failed, the motor was at the top of the machine. At the moment of failure then 30hp electric motor exploder into a huge blue electric flux, the operator was in a trance and I was casually walked by and hit the stop button for him. At this point I invented a safety interlock so that the machine would shut its self off with out me.
Thennn!!! by the end of the day we had to install a new 30hp motor with an engine crane. by 8AM the next morning we were fully back in operation.