02Aug
District Heating Pump VFD Harmonics: Feeder Logging
District heating networks modulate circulation pumps with outdoor-reset and differential-pressure controls, so VFD harmonic current at the pump feeder changes with outdoor temperature and zone demand. Assessing district heating pump···
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02Aug
Water Treatment Aeration Blower VFD Harmonics Guide
Water treatment plants run large aeration blowers on VFDs whose speed tracks dissolved-oxygen setpoints, so harmonic current at the blower feeder rises and falls with biological demand rather than with···
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01Aug
Commissioning Multiple APFs for Parallel Load Sharing
Parallel APF commissioning is a coordinated acceptance activity. Each unit needs a valid current reference, compatible operating settings, and staged observations at the common bus before any sharing behavior is···
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01Aug
Printing and Packaging VFD Harmonics: Capacitor Boundaries
Printing and packaging lines run VFDs on unwinders, press units, dryers, laminators, and slitters, and many of these plants also carry legacy power factor capacitor banks. Assessing printing and packaging···
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31Jul
Using Harmonic Impedance Evidence Before Adding Capacitor Stages
An impedance scan is a study and evidence activity, not a catalog selection rule. It examines how the bus may respond across frequencies under defined network and switching scenarios before···
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