A variable frequency drive (VFD) fails to vary the discharge-air fan speed. A motor overheats and fails prematurely. Programmable controls that generally operate without issue suddenly experience ...

Last year, the plant upgraded a large, critical motor system by adding a variable frequency drive (VFD). The main impetus for this decision was to stop the damage from across the line starts, an ...

As part of a green initiative, your division VP hired a special team to "clean up the power factor" at every plant As part of a green initiative, your division VP hired a special team to "clean up the ...