80 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Chapter 4 Metering
Related Functions
• Voltage and Current Metering
•Power Metering
• Energy Metering
• Configuration Lock
Metering Overview
The PowerMonitor 5000 unit performs calculations on scaled, digital voltage,
and current values. Signals that are connected to the voltage and current inputs
are sampled and their instantaneous values are converted to digital values in an
analog-to-digital (A/D) converter section. These values are scaled according to
configured PT Primary, PT Secondary, CT Primary, and CT Secondary
parameters, and evaluated according to the configured Wiring Mode parameter.
All metering results can be viewed by using the Web interface,
FactoryTalk EnergyMetrix software, version 2.00.00 or later, or standard CIP™
communication.
Summary of Measurements
• Current: Average Current, Positive/Negative/Zero Sequence, Percent
Unbalance
• Voltage: Line-Line, Line-Neutral, Average, Positive/Negative/Zero
Sequence, Percent Unbalance
• Frequency, Average Frequency
• Power: Real (W), Reactive (VARs), Apparent (VA), Total
• Power Factor: True (Full Bandwidth), Displacement (Fundamental),
Lead, Lag, Demand
• Real Energy Consumption (kWh, GWH), Forward, Reverse, Net
• Reactive Energy Consumption (kVARh, GVARh) Forward, Reverse, Net
• Apparent Energy Consumption (kVAh, GVAh) Net
• Current Consumption (Amp-h)
• Demand and Projected Demand (kA, kW, kVAR, kVA)
• IEEE Percent Total Harmonic Distortion
• IEC Percent Total Harmonic Distortion
•Crest Factor
•K-Factor
• Phase Rotation (ABC, ACB)
•Time of Use
Metering Accuracy Class
ANSI C12.20 -2010 (clause 8) Class 0.2 and
EN 62053-22 - 2003 (clause 5.5.4) Class 0.2
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