ABB RELION REX640 Technical Manual page 1651

1MRS759142 C
REX640
Technical Manual
A preferable way of continuous statistics recordings can be selected over a longer
period (months, years). With the Trigger mode setting, the way the next possible
observation time is activated after the former one has finished can be selected.
Table 1465: Trigger mode observation times
Trigger mode
Single
Periodic
Continuous
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.
Power quality measurement functions
Observation time
Only one period of observation time is activated.
The time gap between the two trigger signals is
seven days.
The next period starts right after the previous
observation period is completed.
Section 10
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