User Manual, PRIOR to Firmware rev. 3.0 Owner manual

Publication 1404-UM001D-EN-E - October 2004
3-6 Powermonitor 3000 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.
Table 3.3 Voltage, Current and Frequency Metering
Parameter Description Range Units
Phase 1 L-N Voltage RMS line to neutral voltage of individual phase or 3-phase
average
0 to 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 3-phase average
0 to 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 3-phase average
0 to 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 to 999.9x10
22
Amps
Frequency The frequency of the voltage. 40.0 to 75.0 Hertz
Phase Rotation The phase rotation of a 3-phase system None
ABC
ACB
N/A
Voltage Positive Sequence
Magnitude of positive sequence voltage in a 3-phase system.
(1)
0 to 999.9x10
22
Volts
Voltage Negative Sequence
Magnitude of negative sequence voltage in a 3-phase system.
(1)
0 to 999.9x10
22
Volts
Current Positive Sequence Magnitude of positive sequence current in a 3-phase system.
0 to 999.9x10
22
Amps
Current Negative Sequence Magnitude of negative sequence current in a 3-phase system.
0 to 999.9x10
22
Amps
Voltage Unbalance The ratio between the negative and positive voltage sequence in
a 3-phase system.
0 to 100 Percen
t
Current Unbalance The ratio between the negative and positive current sequence in
a 3-phase system.
0 to 100 Percen
t
(1) Expressed in line-to-neutral volts for Wye and line-to-line volts for Delta wiring modes.