Rockwell Automation Publication 1426-UM001J-EN-P - August 2019 483
Appendix I
EN 61000-4-30 Metering and Aggregation
Introduction
EN 61000-4-30 is an international standard that defines methods for
measurement and interpretation of results for power quality parameters in AC
power systems.
Class A defines requirements for precise measurements of power quality
parameters. Measurement methods are defined for each identified power quality
parameter so that measurements of parameters by different instruments agree
within the specified uncertainty. Class S defines a less rigorous set of
requirements, typically used for surveys or power quality assessment. Class B is
also included in the standard to permit legacy instruments from becoming
obsolete.
The standard also defines requirements for time aggregation of measurements.
The basic interval of measurement is 10 cycles for 50 Hz and 12 cycles for 60 Hz,
or 200 mS. Measurements that are made at the basic 10/12 Hz rate can then be
aggregated into 150/180 Hz (3 second), 10 minute, and 2-hour times, depending
on the parameter. Class A and class S requirements for aggregation differ in how
intervals of different lengths are kept in synchronization and whether gaps in the
basic 10/12 cycle data are permitted.
Metering Class Designation
The PowerMonitorâ„¢ 5000 M8 model conforms to class A and class S
requirements as indicated in Table 235
.
Table 235 - EN 61000-4-30 Class Designations (M8 model only)
61000-4-30 Section Power Quality
Parameter
Power Monitor 5000 Class Designation Remarks
Metering Aggregation
5.1 Power frequency A S
5.2 Magnitude of the supply voltage A S
5.3 Flicker A S Pst range 0.1…12
5.4 Supply voltage dips and swells A
5.5 Voltage interruptions A
5.7 Supply voltage unbalance A S
5.8 Voltage harmonics A S
5.9 Voltage interharmonics A S
5.10 Mains signaling voltage A
5.12 Underdeviation and overdeviation A S
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