[anschlussbsp-ext-schutzger-fehlerab-pause-wlk-310702, 1, en_US]
Figure 2-57
Connection example with external protection device for fault detection dependent dead time
— dead time control by pickup signals of the protection device; AR control mode = with
PICKUP
Setting Notes
If the automatic reclosing function is not required, it can be set to Disabled at address 133. All parameters
for the settings of the automatic reclosing function are thus not accessible.
To use the internal automatic reclosing function, the type of reclosing must be specified at address 133 79
Auto Recl. and the AR control mode at address 134 when configuring the device scope of functions
(Section 2.1.1.2 Setting Notes).
The 7SD80 allows up to 2 reclosing attempts with the integrated automatic reclosing function. Whereas the
settings in address 3401 to 3425 apply commonly to all reclosing cycles, the individual settings of the two
cycles are entered from address 3450 onwards.
The automatic reclosing function can be turned ON or OFF under address 3401 FCT 79.
A prerequisite for automatic reclosing taking place after a trip due to a short circuit is that the circuit breaker is
ready for at least one OPEN-CLOSE-OPEN cycle at the time the automatic reclose circuit is started, i.e. at the
time of the first trip command. The readiness of the circuit breaker is signaled to the device via the binary
input
>Bkr1 Ready
(no. 371). If no such signal is available, leave the setting under address 3402 52?
1.TRIP = NO because no automatic reclosing would be possible at all otherwise. If circuit-breaker interroga-
tion is possible, you should set 52? 1.TRIP = YES.
Furthermore the circuit-breaker ready state can also be interrogated prior to every reclosure. This is set when
setting the individual reclose cycles (see below).
To check the ready status of the circuit breaker is regained during the dead times, you can set a circuit-breaker
ready monitor time under address 3409 CB TIME OUT. The time is set slightly longer than the recovery time
of the circuit breaker after a TRIP–CLOSE–TRIP–cycle. If the circuit breaker is not ready again by the time this
timer expires, no reclosure takes place, the automatic reclosure function is blocked dynamically.
2.11.2
Functions
2.11 Automatic Reclosure Function (optional) 79
136 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
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