ABB 615 series Technical Manual page 742

Section 4
Protection functions
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Figure 368: Operating area of 32Q-27 function
Quadrant II Generator produces active power, but draws reactive power (under-excited)
Quadrant III Generator produces both active and reactive power
The power direction can be reversed by setting Pol reversal to "True".
Timer
Once activated by both Under voltage detection and Reactive power monitoring module,
the Timer activates the PICKUP output. The Timer characteristic is according to DT.
When the operation timer has reached the value set by Trip delay time, the TRIP output
is activated. If the fault disappears before the module operates, the Timer is reset
instantaneously.
The Timer calculates the start duration value PICKUP_DUR which indicates the
percentage ratio of the pickup situation and the set operating time. The value is available
through the Monitored data view.
Blocking logic
There are three operation modes in the blocking function. The operation modes are
controlled by the BLOCK input and the global setting Configuration/System/Blocking
1MAC059074-MB A
615 series ANSI
Technical Manual