They can be applied on any three-phase equipment, they are mainly present in machines used on construction sites or in those situations when the exact rotation direction is not guaranteed. It is known that a reversal between 2 phases in a line leads to direction reversal of the three-phase motors, reversal that can be dangerous or anyway not desired for the application to be carried out. The application in the control unit solves the need for proper detection of the rotation direction, activating a command for the interruption of the line or for the phase change. It also manages another typical problem present in construction plants: phase lack.
Therefore, it can provide greater security to machines in a very simple way and it is cost competitive.
The picture shows the three-phase control panel in which the movement direction is managed automatically.