ABB REF615 G - Page 786

It is also possible that there are simultaneously a dip in one phase and a swell in
other phases. The functionality of the corresponding event indication with one
inactive phase is shown in Figure 419. Here, the "Swell + dip" variation type of
Phase mode is "Single Phase". For the selection "Three Phase" of Phase mode, no
event indication or any activation takes place due to a non-active phase.
U_A
U_C
U_B
ST_B
ST_C
ST_A
DIPST
INTST
SWELLST
SWELLOPR
INTOPR
DIPOPR
Voltage Int set
Voltage dip set
Voltage swell set
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
GUID-0657A163-7D42-4543-8EC8-3DF84E2F0BF5 V1 EN
Figure 419: Concurrent dip and swell when Phase mode is "Single Phase"
In Figure 420, one phase is in dip and two phases have a swell indication. For the
Phase Mode value "Three Phase", the activation occurs only when all the phases
are active. Furthermore, both swell and dip variation event detections take place
simultaneously. In case of a concurrent voltage dip and voltage swell, both
SWELLCNT and DIPCNT are incremented by one.
Also
Figure 420 shows that for the Phase Mode value "Three Phase", two different
time moment variation event swell detections take place and, consequently,
DIPCNT is incremented by one but SWELLCNT is totally incremented by two.
Both in
Figure 419 and Figure 420 it is assumed that variation durations are
sufficient for detections to take place.
Section 10 1YHT530004D05 D
Power quality measurement functions
780 615 series
Technical Manual