Rockwell Automation 1426 PowerMonitor 5000 Unit - Manual (Page 82)

82 Rockwell Automation Publication 1426-UM001F-EN-P - November 2013
Chapter 5 Power Quality Monitoring
The PowerMonitor 5000 unit classifies power quality events it detects according
to the table. The M6 model does not detect events in categories 1, 5.3, 5.4, 5.5, or
6.
Short Duration RMS
Variations (Category 2.0 -
Sags, Swells, and
Interruptions) (M6 model) The PowerMonitor 5000 M6 model detects and records instantaneous,
momentary and temporary variations in the RMS voltage. Interruptions are
recorded where the residual voltage is less than 10% of nominal. Configurable
parameters are provided for 5 levels of sag detection and 4 levels of swell
detection.
Setup
Basic metering configuration is required. The default values of the sag and swell
trip points and hysteresis configuration parameters are selected to conform to the
guidelines in IEEE 1159 and EN 50160 and are listed in the following table. The
associated configuration parameters are found in the
Configuration.PowerQuality tab.
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 14 - Categories and Typical Characteristics of Power System Electromagnetic Phenomena
(1)
Categories Typical Spectral Content Typical Duration Typical Voltage Magnitude
Table 15 - Sag and Swell Configuration Parameters
Parameter Default Range
Sag1_Trip_Point_% 90 0.00…100.00
Sag1_Hysteresis_% 2 0.00…10.00
Sag2_Trip_Point_% 80 0.00…100.00
Sag2_Hysteresis_% 2 0.00…10.00
Sag3_Trip_Point_% 70 0.00…100.00
Sag3_Hysteresis_% 2 0.00…10.00
Sag4_Trip_Point_% 40 0.00…100.00
Sag4_Hysteresis_% 2 0.00…10.00
Sag5_Trip_Point_% 5 0.00…100.00