THE BLOGHome / Blog

The VFD Answer Man, Vol. 1: VFD's over 60 Hz

December 20, 2015 |By: Terry M. Smith

The question has arisen about ABB VFD’s operating motors above 60 Hz...

The VFD Answer Man, Vol. 2: VFD, Line Reactors, and Harmonic Filters

December 20, 2015 |By: Terry M. Smith

DO NOT add pricing to any ACH550 VFD or package for line reactors. They are absolutely not necessary...

The VFD Answer Man, Vol. 3: Over Greasing Bearing Failure

December 20, 2015 |By: Terry M. Smith

Over greasing a motor will destroy it. Most people who service motors think they know the proper procedure...

The VFD Answer Man, Vol. 4: The NEMA Motor Frame Puzzle

December 20, 2015 |By: Terry M. Smith

Let's discuss NEMA frames first. NEMA frames are grouped into families...

The VFD Answer Man, Vol. 5: Earth Faults and ABB

December 20, 2015 |By: Terry M. Smith

On all ACH550 drives leaving the factory there is a new program parameter that allows you to set the ground fault detection level...

The VFD Answer Man, Vol. 6: Motors, VFD's, and Long Lead Lengths

December 20, 2015 |By: Terry M. Smith

Motors 150 feet or more in cable distance from the output of a VFD are most probably going to suffer from a phenomenon known as voltage doubling...

The VFD Answer Man, Vol. 7: VFD's and Motor Bearing Failure

December 20, 2015 |By: Terry M. Smith

IGBT’s can cause a host of problems with motors and electrical systems with improper installation...

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