Further, the operation of the VFD must be hardwire interlocked with the position of the associated fan motor disconnect switch such that if the manual disconnect switch is in the off position, the VFD ...

The topic of motors and motor control techniques is wide and varied. Part one of this two-part article will cover the principles of alternating-current (AC) motor operation and control. Part two will ...

The image above is a terminal board diagram. Consult with the VFD user manual to find the function of the terminal. In most cases though, VFDs are used for their variable speed control with ...