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Can a Powerlogic or ION meter be used for monitoring Variable Frequency Drives (VFDs)?

Issue
Can the output of a VFD be measured using a Powerlogic or ION metering solution?

Product Line
Powerlogic Metering
ION Metering

Environment
Metering
Energy Management

Cause
Can ION or Powerlogic meters be used to monitor the output of a VFD for energy consumption and/or frequency monitoring.

Resolution
Powerlogic and ION metering families are not designed for non-sinusoidal variable frequency waveforms. These meters are designed to measure a fairly constant frequency, and have a very small range of variance (usually 45-65 Hz depending on the specific device). Because of this, they are unable to measure the output of a variable frequency drive.
 
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