ABB Relion RER615 - Page 716

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
Figure 366: Concurrent dip and swell when Phase mode is "Single Phase"
In Figure 367 , 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 367 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 366 and Figure 367 it is assumed that variation durations are sufficient for
detections to take place.
Power quality measurement functions
1MRS758755 C
716 REC615 & RER615
Technical Manual