ABB RELION 620 Series Technical Manual page 361

1MAC504801-IB E
620 series ANSI
Technical Manual
Q
Start value

Non operating
area
GUID-27F1C899-F8E0-43F6-8326-8F7DCD5E9007 V2 EN
Figure 163: Operating characteristics with the Start Value setting, Power angle (α)
being +45 and Directional mode "Forward"
Timer
Once activated, the Timer activates the PICKUP output. The time characteristics are
according to DT. When the operation timer has reached the value of Trip delay time, the
TRIP output is activated. If a drop-off situation happens, that is, the value of power drops
below Pickup value before the operate delay is exceeded, the timer reset state is activated.
If the reset timer reaches the value set by Reset delay time, the operate timer resets and the
PICKUP output is deactivated.
The Timer calculates the start duration value PICKUP_DUR, which indicates the
percentage ratio of the start situation and the set operating time (DT). The value is
available in the Monitored data view.
Blocking logic
The binary input BLOCK can be used to block the module. The activation of the BLOCK
input deactivates all outputs and resets internal timer. The binary input BLK_PICKUP can
be used to block the PICKUP signal. The binary input BLK_TRIP can be used to block the
TRIP signal. The operation timer counting can be frozen on the prevailing value by
activation of the FR_TIMER input.
Operating
area
P
Section 4
Protection functions
355