ABB RED615 Technical Manual page 788

Section 10
Power quality measurement functions
782
phase, and the 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 421 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
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-7A859344-8960-4CF3-B637-E2DE6D3BDA85 V1 EN
Figure 421: Valid recorded voltage interruption and two dips
421. It is shown also with dotted arrows how voltage time
U_C amplitude & timestamp
U_A duration
U_B
U_B duration
U_B amplitude &
timestamp
1YHT530004D05 D
Table 651. There are
U_C
U_A
U_A amplitude &
timestamp
615 series
Technical Manual