Siemens SICAM Q80 System Manual page 49

System events
In the branch "Overall system", events for monitoring of symmetry and frequency are defined.
The following settings are available for monitoring the averaging duration:10/12 cycles, 1 seconds values or Mean.
The event recording does not depend on individual lines. System events are only captured on Y- and Delta-
configurations, not for single-phase measurements.
The hysteresis set must be appropriate for the value limit:
Unbalance:
Hysteresis < Level
Frequency:
Min + Hysteresis < Max
Max – Hysteresis > Min
or MaxValue-MinValue > Hysteresis
Voltage
Voltage events can be configured for L1..L3 and L12, L23, L31 in parallel.
The averaging duration can be Period, 1 seconds values or Mean
The hysteresis set must be appropriate for the value limit:
Unbalance:
Hysteresis < Level
Frequency:
Min + Hysteresis < Max
Max – Hysteresis > min
or MaxValue-MinValue > Hysteresis
Events - Unsymmetry and Frequency
Events - Voltages
Operation modes and settings
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
49