Rockwell Automation 1408-EMxx PowerMonitor 1000 Unit - Manual (Page 35)

Rockwell Automation Publication 1408-UM001D-EN-P - September 2013 35
PowerMonitor 1000 Unit Features Chapter 2
Metered Parameters
The power monitor calculates and returns four-quadrant power measurements
including these:
• L1, L2, L3 and Total True Power Factor, percent lagging (-) and leading
(+)
• L1, L2, L3 and Total Real Power, kW
• L1, L2, L3 and Total Reactive Power, kVAR
• L1, L2, L3 and Total Apparent Power, kVA
Only total three-phase power results are provided when Direct Delta or Open
Delta wiring modes are selected.
The Magnitude and Direction of Power Quantities chart indicates the
relationship between the magnitude and direction of the power quantities and
the numeric signs used by the power monitor.
Figure 6 - Magnitude and Direction of Power Quantities
Setup
Only basic analog-input setup is required for power metering.
II
III IV
I
90°
180°
270°
0°
Pf = 100%
+kW (import)
kWH-F
(forward)
(power factor lagging)
(-)
Pf = 0
+kVAR (import)
kVARHR-F (forward)
(power factor
leading)
(+)
(power factor
lagging)
(-) (power factor
leading)
(+)
Pf = 0
-kVAR (export)
kVARHR-R (reverse)
Pf = 100%
-kW (export)
kWH-R (reverse)