ABB RELION REX640 Technical Manual page 1652

Section 10
Power quality measurement functions
1646
OBS_PR_ACT
7 days
GUID-2FE7FC47-774C-4593-9D12-75136E554703 V1 EN
Figure 849: Periods for statistics recorder with different trigger modes and period
settings
The BLOCK input blocks the OBS_PR_ACT output, which then disables the
maximum value calculation of the Statistics recorder module. If the trigger mode is
selected "Periodic" or "Continuous" and the blocking is deactivated before the next
observation period is due to start, the scheduled period starts normally.
Statistics recorder
The Statistics recorder module provides readily calculated three-second or ten-minute
values of the selected phase to the percentile calculator module based on the length of
the active observation period. If the observation period is less than one day, the three-
second average values are used. If the observation period is one day or longer, the ten-
minute average values are used.
1MRS759142 C
Trigger mode - Single
Obs period selection – 4 (7 days)
Trigger mode - Continuous
Obs period selection – 4 (7 days)
Trigger mode - Continuous
Obs period selection – 3 (1 day)
Trigger mode - Periodic
Obs period selection – 3 (1 day)
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