A typical low-voltage variable-frequency drive. Industrial facilities commonly use variable-frequency drives (VFDs) to control the speed at which alternating current motors operate. Let’s examine a ...

I see techs in the field get the most frustrated when they have a low-voltage short they can’t seem to locate. The challenge techs face with low voltage diagnosis is a combination of poor process and ...

A short circuit on a Red Line train prevented a failsafe from triggering and allowed the vehicle to leave the station while a passenger was trapped in a door, federal investigators concluded while ...