
M3x5/EN M/B
User Manual
Page 98
iSTAT M3x5
Phenomena PQ
Parameters
Frequency variations
Frequency distortion
Voltage variations
Voltage fluctuation
Voltage
unbalance
Voltage changes
Rapid voltage changes
Flicker
Voltage events
Voltage dips
Voltage
interruptions
Voltage
swells
Harmonics & THD
THD
Harmonics
Inter-harmonics
Signalling
voltage
TABLE 12-2: POWER QUALITY INDICES AS DEFINED BY EN50160
For evaluation of voltage quality, the
M3x5
stores the measurements of the main voltage
characteristics in to internal memory. The reports are made on the basis of this stored data.
Data for the last 300 weeks and up to 170,000 variations of the measured quantities from the
standard values are stored in the report, which enables detection of anomalies in the
network.
QDSP2
software offers a complete review of the reports with a detailed review of individual
measured quantities and anomalies. A review of compliance of individual measured
quantities in previous and actual monitored periods is possible.
12.4.5.1 Online monitoring
When all PQ parameters are set and analysis is enabled, PQ starts on the defined date and
starts issuing weekly reports (if monitoring period setting is set to one week).
QDSP2
software allows the monitoring of the state of the actual period and of the previous
monitoring period. Both periods can be overviewed on the devices display as well.
(KD)
Main menu
Measurements
Power supply quality
Actual period/Previous
period
Below is an example of PQ report for actual period generated on the device display. More
detailed information about PQ is available via communication.
Basic information about actual monitoring period.
Period is not completed and currently not in
compliance with EN 50160
Display of current status of PQ parameters.
Some are currently not in compliance with EN
50160
Display of current status of PQ parameters.
Some are currently not in compliance with EN
50160
Display of current status of PQ parameters. All
are currently in compliance with EN 50160
Summary of Contents for iSTAT M355
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