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Variable Frequency Drive Motor Power Diagnostics
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How to test a IGBT function on a VFD. Learn which measurements are useful.
Always check amps in each leg- they need to be the same ( motor running at a steady RPM)
Always check voltages across all 3 legs. This voltage needs to be the same. ( motor running at a steady RPM)
If volts or amps aren't the same between each of the 3 legs , there is a problem. Double check all wire connections, if there is no obvious problems try replacing the VFD.
Always check amps in each leg- they need to be the same ( motor running at a steady RPM)
Always check voltages across all 3 legs. This voltage needs to be the same. ( motor running at a steady RPM)
If volts or amps aren't the same between each of the 3 legs , there is a problem. Double check all wire connections, if there is no obvious problems try replacing the VFD.
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