Tag Archives: vfd fault

Emergency VFD Replacements at a Level 1 Trauma Center

Last weeks multiple massive thunderstorms caused major power dips, voltage spikes/surges, voltage fluctuations, phase losses and generator switch-overs. All of these electrical events  can create havoc upon sensitive electronic devices. VFDs are no exception. During these storms with all of … Continue reading

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Utilizing Inverter Duty Motors with VFDs

This is a good article from the U.S Department of Energy discussing the effects of VFDs on non-inverter duty rated motors. It discusses the insulation class recommended, in this article, “class H” is suggested. I previously had been recommending at … Continue reading

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VFD Preventive Maintenance!

Several Variable Frequency Drives (VFDs) were sent into Deltas’ shop for repair. The clients’ complaint for them was that they were failing with an “Overtemp” fault. This is a very common fault/failure on all brands of VFDs. With only a … Continue reading

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