Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 32)

32 Publication 1404-UM001F-EN-P - November 2009
Chapter 3 Powermonitor 3000 Unit Operations
Power Results
Real power, that is the portion of the voltage and current applied to a
power system that is doing work, is calculated on a per-phase (L1 Real
Power, L2 Real Power, L3 Real Power), and Total Real Power. L1
Reactive Power, L2 Reactive Power, L3 Reactive Power and Total
Reactive Power similarly return that portion of the power used in
capacitive or inductive reactance in the power system and doing no
work. L1 Apparent Power, L2 Apparent Power, L3 Apparent Power
and Total Apparent Power return the apparent power, which is the
simple mathematical product of the system voltage and system
current.
For single-phase wiring mode, all L3 power values remain at zero and
are not included in the total power calculation.
Voltage, Current, and Frequency Metering
Parameter Description Range Units
Phase 1 L-N Voltage RMS line to neutral voltage of individual phase or three-phase
average
0…999.9x10
22 Volts
Phase 2 L-N Voltage
Phase 3 L-N Voltage
3-Phase Average L-N Voltage
Phase 1 L-L Voltage
RMS line to line voltage of individual phase or three-phase
average
0…999.9x10
22 Volts
Phase 2 L-L Voltage
Phase 3 L-L Voltage
3-Phase L-L Voltage
Phase 1 Current
RMS line current in individual phase or three-phase average
0…999.9x10
22 Amps
Phase 2 Current
Phase 3 Current
3-Phase Average Current
Phase 4 (Neutral) Current
RMS current of phase 4, also known as neutral or zero-sequence
current
0…999.9x10
22 Amps
Frequency The frequency of the voltage 40.0…75.0 Hertz
Phase Rotation The phase rotation of a three-phase system None
ABC
ACB N/A
Voltage Positive Sequence Magnitude of positive sequence voltage in a three-phase
system
(1)
0…999.9x10
22 Volts
Voltage Negative Sequence Magnitude of negative sequence voltage in a three-phase
system
(1)
0…999.9x10
22 Volts
Current Positive Sequence Magnitude of positive sequence current in a three-phase system
0…999.9x10
22 Amps
Current Negative Sequence Magnitude of negative sequence current in a three-phase system 0…999.9x10 22 Amps
Voltage Unbalance The ratio between the negative and positive voltage sequence in
a three-phase system 0…100 Percent
Current Unbalance The ratio between the negative and positive current sequence in
a three-phase system 0…100 Percent
(1) Expressed in line-to-neutral volts for Wye and line-to-line volts for Delta wiring modes.