Rockwell Automation Allen-Bradley PowerMonitor 5000 Unit - Transients (Category 1.1.3, 1.2.1)(M8 Model)

464 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Appendix G IEEE 1159 Power Quality Event Classification
The power monitor classifies power quality events the unit detects according to
the table. The M6 model does not detect events in categories 1, 5.3, 5.4, 5.5, or 6.
Transients (Category 1.1.3,
1.2.1)(M8 model)
The PowerMonitor 5000 detects and records transient voltage events as
described in IEEE 1159, Category 1.1.3, Impulsive, Millisecond and 1.2.1,
Oscillatory, Low Frequency. The PowerMonitor 5000 does not detect events in
Categories 1.1.1, 1.1.2, 1.2.2, and 1.2.3.
Setup
Basic metering setup is required. The configuration parameter for transient
detection is found in the Configuration.PowerQuality
table.
• Transient_Detection_Threshold_% - Percentage of the RMS value of the
present cycle voltage, range 0 … 50%, default 4%
3.1 Interruption, sustained > 1 min 0.0 pu • •
3.2 Undervoltages > 1 min 0.8…0.9 pu • •
3.3 Overvoltages > 1 min 1.1…1.2 pu • •
3.4 Current overload > 1 min
4.0 Imbalance ••
4.1 Voltage steady state 0.5…2% • •
4.2 Current steady state 1.0…30% • •
5.0 Waveform distortion ••
5.1 DC offset steady state 0…0.1% • •
5.2 Harmonics 0…9 kHz steady state 0…20% • •
5.3 Interharmonics 0…9 kHz steady state 0…2% •
5.4 Notching steady state
5.5 Noise broadband steady state 0…1%
6.0 Voltage fluctuations < 25 Hz intermittent 0.1…7% • •
0.2…2 Pstb ••
7.0 Power frequency variations < 10 s ± 0.10 Hz • •
(1) These terms and categories apply to power quality measurements and are not to be confused with similar terms defined in IEEE Std 1366-2003 [B27] and other reliability-related standards,
recommended practices, and guides.
(2) The quantity pu refers to per unit, which is dimensionless. The quantity 1.0 pu corresponds to 100%. The nominal condition is often considered to be 1.0 pu. In this table, the nominal peak value is
used as the base for transients and the nominal rms value is used as the base for rms variations.
Table 227 - Categories and Typical Characteristics of Power System Electromagnetic Phenomena
(1)
(continued)
Categories Typical Spectral Content Typical Duration Typical Voltage
Magnitude
1426-M6 1426-M8