Harmonic Audit — THDᵥ & THDᵢ

Full-spectrum voltage and current harmonic measurement at PCC and downstream feeders, with root-cause attribution to specific non-linear loads.

Class A power quality logging at point of common coupling and selected downstream feeders
Individual and total harmonic distortion (THDᵥ, THDᵢ) captured to the 50th order or beyond, as recorded by the instrument
Harmonic spectrum trending against IEEE 519-2022 and IEC 61000-3-2/3-12 limits
Root-cause attribution — VFDs, UPS, SMPS banks, rectifiers, arc/induction furnaces
K-factor calculation for transformer and neutral conductor derating
Resonance risk screening against existing capacitor banks

Recorded waveform and spectrum data set (raw + processed)
Harmonic distortion report referenced to IEEE 519-2022 / IEC 61000
Root-cause summary with affected loads identified
Mitigation recommendation — passive filter, active filter, or line reactor, sized but vendor-unspecified

Also part of this service