ABB RELION Series Technical Manual page 694

Grid automation
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Section 10
Power quality measurement functions
688
"Single Phase". For the selection "Three Phase" of Phase mode, no event indication or
any activation takes place due to a non-active phase.
Voltage swell set
Voltage dip set
Voltage Int set
ST_A
ST_B
ST_C
SWELLST
DIPST
INTST
SWELLOPR
DIPOPR
INTOPR
GUID-0657A163-7D42-4543-8EC8-3DF84E2F0BF5 V1 EN
Figure 367:
Concurrent dip and swell when Phase mode is "Single Phase"
In
Figure
368, 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 368
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
367
and
Figure 368
it is assumed that variation durations are sufficient for detections
to take place.
U_A
U_C
U_B
1MRS758755 A
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
Figure
REC615 and RER615
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