Siemens SIPROTEC 4 7SJ61 Manual page 176

Functions
2.13 Flexible Protection Functions
[7sj61-logik-flexstz-100504-st, 1, en_US]
Figure 2-70
The parameters can be set to monitor either exceeding or dropping below of the threshold. The configurable
pickup time delay will be started once the threshold (>-element) has been exceeded. When the time delay has
elapsed and the threshold is still violated, the pickup of the phase (e.g. no. 235.2122
the function (no. 235.2121
occur simultaneously with the detection of the threshold violation. If the function is enabled, the pickup will
start the trip time delay and the fault log. This is not the case if set to "Alarm only". If the threshold violation
persists after the trip time delay has elapsed, the trip will be initiated upon its expiration (no. 235.2126
TRIP ). The timeout is reported via (no. 235.2125 $00 Time Out ). Expiry of the trip time delay can be
blocked via binary input (no. 235.2113
binary input is active; a trip can thus be initiated. The time delay is started after the binary input has dropped
out and the pickup is still present. It is also possible to bypass the expiration of the time delay by activating
binary input (no. 235.2111
present and the binary input has been activated. The trip command can be blocked via binary inputs (no.
235.2115 >$00 BL.TripA ) and (no. 235.2114 >$00 BLK.TRIP ). The phase-selective blocking of the trip
command is required for interaction with the inrush restraint (see "Interaction with other functions"). The
function's dropout ratio can be set. If the threshold (>-element) is undershot after the pickup, the dropout
176
Logic diagram of the flexible protection functions
$00 picked up ) is reported. If the pickup delay is set to zero, the pickup will
>$00 BLK.TDly ). The time delay will not be started as long as the
>$00 instant. ). The trip will be launched immediately when the pickup is
$00 pickup A )and of
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
$00