GE Power Management PQM Power Quality Meter 1-7
1 OVERVIEW 1.2 STANDARD FEATURES
1
c) POWER ANALYSIS OPTION
Non-linear loads (such as variable speed drives, computers, and electronic ballasts) can cause unwanted har-
monics 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 har-
monic 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
Voltage and current waveforms can be captured and displayed on a PC with PQMPC or third party software.
Distorted peaks or notches from SCR switching provide clues for taking corrective action.
Figure 1–7: CAPTURED WAVEFORM
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