ABB Relion 620 Series - Page 1111

Table 1050: Trigger mode observation times
Trigger mode Observation time
Single Only one period of observation time is acti-
vated.
Periodic The time gap between the two trigger sig-
nals is seven days.
Continuous The next period starts right after the previ-
ous observation period is completed.
The length of the period is determined by the settings Obs period selection and
User Def Obs period . The OBS_PR_ACT output is an indication signal which exhibits
rising edge (TRUE) when the observation period starts and falling edge (FALSE)
when the observation period ends.
If the
Percentile unbalance , Trigger mode or Obs period duration settings change
when OBS_PR_ACT is active, OBS_PR_ACT deactivates immediately.
1MRS757644 H
Power quality measurement functions
620 series
Technical Manual
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