Power Analysis; Waveform Capture; Harmonic Analysis - GE Power Quality Meter Series Instruction Manual

6 SOFTWARE

6.6 POWER ANALYSIS

Two cycles (64 samples/cycle) of voltage and current waveforms can be captured and displayed on a PC using
PQMPC or third party software. Distorted peaks or notches from SCR switching provides clues for taking cor-
rective action. Waveform capture is also a useful tool when investigating possible wiring problems due to its
ability to display the phase relationship of the various inputs. The waveform capture feature is implemented
into PQMPC as shown below.
Select the Actual > Power Analysis > Waveform Capture menu item. PQMPC will open the Waveform Capture
dialog box.
• Check the boxes on the left to display the desired waveforms. The waveform values for the current cursor
line position are displayed to the right of any checked boxes.
The Trigger Selected Waveforms button captures new waveforms from the PQM.
•
The Read Selected Waveforms From Device button loads and views previously selected waveforms.
•
The Open button loads and views previously saved waveforms
•
The Save button saves the captured waveforms to a file
•
The Print button prints the currently displayed waveforms
•
The Setup button allows for the setup of capture attributes
•
Non-linear loads such as variable speed drives, computers, and electronic ballasts can cause harmonics which
may lead to problems such as nuisance breaker tripping, telephone interference, transformer, capacitor or
motor overheating. For fault diagnosis such as detecting undersized neutral wiring, need for a harmonic rated
transformer or effectiveness of harmonic filters; details of the harmonic spectrum are useful and available with
the PQM and PQMPC.
GE Power Management PQM Power Quality Meter
6.6 POWER ANALYSIS

6.6.1 WAVEFORM CAPTURE

6.6.2 HARMONIC ANALYSIS

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