Rockwell Automation 1426 PowerMonitor 5000 Unit - Manual (Page 57)

Rockwell Automation Publication 1426-UM001F-EN-P - November 2013 57
Metering Chapter 4
Semantics
Magnitudes are the scaled RMS value of the voltage or current. In Wye and split-
phase modes, voltages are reported as line-to-neutral. In Delta modes, voltage is
reported as line-to-line. Phase angles are referenced to Phase 1 Voltage, which is
defined as zero, consistent with the 4-quadrant metering diagram included in
Power Metering on page 67 .
Note that current angles in Delta modes include a 30° offset due to the phase
angle difference between Wye and Delta modes as shown in the following
diagram.
Related Functions
• Voltage and Current Metering
• Power Metering
• Energy Metering
Wiring Correction The PowerMonitor 5000 unit can correct for wiring errors by logically mapping
physical voltage and current inputs to voltage and current metering channels. You
determine if and when this occurs by issuing a Wiring Corrections Command.
The wiring corrections command offers a number of options:
• Automatically correct the wiring according to the wiring diagnostics
results for the power factor range 1, 2, or 3 that you select.
• Manually apply wiring correction by filling in mapping values in the web
page or other application.
• Remove previously-applied wiring corrections.
The ‘Virtual Wiring Correction’ status indicator next to the voltage terminal
blocks indicates when wiring corrections are in effect.
IMPORTANT Only one wiring correction command can be applied (one command can
correct for multiple errors). If a change is needed, first remove the previous
wiring correction, and then apply the new wiring correction.