ABB RELION REX640 Technical Manual page 1639

1MRS759142 C
REX640
Technical Manual
minimum or maximum magnitude corresponding to swell or dip/interruption during
variation is temporarily stored. If the minimum or maximum is found in tracking and
a new magnitude is stored, also the inactive phase voltages are stored at the same
moment, that is, the inactive phases are not magnitude-tracked. The time instant (time
stamp) at which the minimum or maximum magnitude is measured is also temporarily
stored for each voltage phase where variation is active. Finally, variation detection
triggers the recorded data update when the variation activation ends and the maximum
duration time is not exceeded.
The data objects to be recorded for PHQVVR are given in
totally three data banks, and the information given in the table refers to one data bank
content.
The three sets of recorded data available are saved in data banks 1-3. The data bank 1
holds always the most recent recorded data, and the older data sets are moved to the
next banks (1→2 and 2→3) when a valid voltage variation is detected. When all three
banks have data and a new variation is detected, the newest data are placed into bank
1 and the data in bank 3 are overwritten by the data from bank 2.
Figure 844 shows a valid recorded voltage interruption and two dips for the Phase
mode value "Single Phase". The first dip event duration is based on the U_A duration,
while the second dip is based on the time difference between the dip stop and start
times. The first detected event is an interruption based on the U_B duration given in
Figure 844. It is shown also with dotted arrows how voltage time stamps are taken
before the final time stamp for recording, which is shown as a solid arrow. Here, the
U_B timestamp is not taken when the U_A activation starts.
Voltage swell set
Voltage dip set
Voltage Int set
GUID-FDE91D0B-5975-4477-B34F-79A4709D0152 V1 EN
Figure 844: Valid recorded voltage interruption and two dips
Power quality measurement functions
U_C amplitude & timestamp
U_A duration
U_B
U_B duration
U_B amplitude &
timestamp
Section 10
Table 1454. There are
U_C
U_A
U_A amplitude &
timestamp
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