ABB RELION 620 Series Technical Manual page 369

1MAC504801-IB E
620 series ANSI
Technical Manual
GUID-D4104D30-04BC-4FE5-978A-1401F1D5301F V2 EN
Figure 168: Operating characteristics of 32U with setting Start value
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. In a drop-off situation, that is, if the underpower condition
disappears before the operation delay is exceeded, the timer reset state is activated. If the
reset timer reaches the value set by Reset delay time, the operation timer resets and the
PICKUP output is deactivated.
The DISABLE input can be used to coordinate the correct operation during the generator
start-up situation. By activating the DISABLE signal, both the PICKUP and TRIP
outputs are blocked. Once the DISABLE signal is deactivated, the Timer remains blocked
for an additional time duration as set through the setting Disable time.
Blocking logic
The binary input BLOCK can be used to block the module. The activation of the BLOCK
input deactivates all binary outputs and resets internal timer. The binary input
BLK_PICKUP can be used to block the PICKUP signal. The binary input BLK_TRIP can
Q
Non
Operating
operating
area
area
Start Value
Section 4
Protection functions
P
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