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Siemens SICAM Q80 System Manual page 50

Power quality recorder
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50
SICAM Q80 7KG8080
Line Events
The value limit for the lines L1, L2, and L3 applies globally. The value limit for line L4 is set separately.
The averaging duration is 10/12 cycles, 1 seconds values or Mean.
Depending on the configuration (Y- or Delta-), the value limits of THD and Harmonics are monitored for either L1..L4
OR L12..L31. When the configuration is switched from Y to Delta or vice-versa, the values remain intact.
The hysteresis set must be appropriate for the value limit: Hysteresis < Level
Harmonics Monitoring
Up to 5 monitoring processes are available for harmonic oscillations with value limits: Limit 1 through Limit 5.
It is possible to set multiple monitoring processes (Limits 1 through 5) for the same harmonics oscillation but with
different value limits. Example:
Limit 1: Harmonic 3 with value limit 2 %
Limit 2: Harmonic 3 with value limit4 %
Limit 3: Harmonic 5 with value limit 2 %
Limit 4: Harmonic 5 with value limit 5 %
Limit 5: Harmonic 10 with value limit 2 %
Power monitoring
It is possible to monitor the power of individual phases and of the total power in parallel.
The averaging duration is 10/12 cycles, 1 seconds values or mean.
The hysteresis for the apparent power and the power factor must be appropriate for the value limit: Hysteresis < Level
It is possible to monitor both for the case of the value exceeding the limit or of falling below a minimum value.
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
Events - THD and Harmonics
Events - Power

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