1–8 PQMII POWER QUALITY METER – INSTRUCTION MANUAL
CHAPTER 1: OVERVIEW
FIGURE 1–5: Switch Inputs and Outputs Relays
1.3.3 Power Analysis Option
Non-linear loads (such as variable speed drives, computers, and electronic ballasts) can
cause unwanted harmonics that may lead to nuisance breaker tripping, telephone
interference, and transformer, capacitor or motor overheating. For fault diagnostics such
as detecting undersized neutral wiring, assessing the need for harmonic rated
transformers, or judging the effectiveness of harmonic filters, details of the harmonic
spectrum are useful and available with the power analysis option.
FIGURE 1–6: Harmonic Spectrum
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