Allen-Bradley Powermonitor 3000 User Manual page 160

8-10 Advanced Features
Publication 1404-UM001D-EN-E - October 2004
proper limits for each of the individual harmonics and the TDD
specified in the table columns. IEEE-519 also recommends maximum
voltage distortion levels that the utility should remain below.
Table 11.1 specifies these limits based on the magnitude of the line to
line voltage at the PCC. Once configured, the 1404-M6 will
automatically monitor the system voltage and current for IEEE-519
compliance.
Harmonic Magnitude
The Powermonitor 3000 calculates the RMS magnitude of each
individual harmonic. Results are calculated for harmonics 1 to 41 (M6)
or 1 to 63 (M8) for all 7 voltage and current channels. Each result is
expressed in RMS volts or amps.
Harmonic Distortion
The Powermonitor 3000 calculates the magnitude of each individual
harmonic with respect to the fundamental. Results are calculated for
harmonics 1 to 41 (M6) or 1 to 63 (M8) for all 7 voltage and current
channels. Each result is expressed as a percentage of the fundamental.
Configuring Harmonic Analysis
You may configure harmonic analysis only via communications. The
Display Module does not support harmonic analysis configuration.
Configure harmonic analysis by performing a table write to Table A.33
Harmonic Analysis Configuration/Read-Back Select. This read/write
table of 9 integer elements comprises the following configuration
parameters.
• Password: needed to enable or disable harmonic analysis or
write the maximum short-circuit and demand current
parameters. Not needed for read-back select, use -1. Default
0000
• Channel: Specifies the channel of harmonic data to obtain in the
next read of Table 33. 1 = V1, 2 = I1, 3 = V2, 4 = I2, 5 = V3, 6 =
I3, 7 = I4, 8 = avg. of voltage channels, 9 = avg. of current
channels. On a read, indicates the last selection made. Default 1
• Read-back mode: selects read-back mode for Table A.34. Range
0 to 1, default 0. See below