Siemens siprotec SJ62, User Manual

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2 Functions
243
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Figure 2-85 CFC Logic for ManCI with AR via Control
The selection list for parameter
7137
is created dynamically depending on the allocat-
ed switchgear components. If one of the switchgear components is selected, usually
the circuit breaker
„52Breaker“
, reclosure is accomplished via control. In this case,
the automatic reclosure function does not create a close command but issues a close
request. It is forwarded to the control which then takes over the switching. Thus, the
properties defined for the switchgear component such as interlocking and command
times apply. Hence, it is possible that the close command will not be carried out due
to an applying interlocking condition.
If this behavior is not desired, the auto-reclose function can also generate the close
command
„79 Close“
directly which must be allocated to the associated contact.
The CFC Chart as in Figure 2-85 is not needed in this case.
Connection to In-
ternal Synchro-
check (only 7SJ64) The auto-reclose function can interact with the internal synchronizing function of the
7SJ64 relay. If this is desired as well as the Manual Close functionality, the CFC chart
depicted in Figure 2-85 is obligatory since the synchronizing function always works to-
gether with the control function. In addition, one of the four synchronization groups
must be selected via parameter
7138 Internal SYNC
. Thus, synchronization con-
ditions for automatic reclosing are specified. The selected synchronization group
defines in that case the switchgear component to be used (usually the circuit breaker
„52Breaker“
). The switchgear component defined there and the one specified at
7137 Cmd.via control
must be identical. Synchronous reclosing via the close
command
„79 Close“
is not possible.
If interaction with the internal synchronization is not desired, the CFC Chart, as in
Figure 2-85, is not required and the parameter
7138
is set to
none
.
Auto-Reclosing
with External Syn-
chrocheck Parameter
7139 External SYNC
can be set to determine that the auto-reclose func-
tion operates with external synchrocheck. External synchronization is possible if the
parameter is set to
YES
and 7SJ64 is linked to the external synchrocheck via the
message 2865
„79 Sync.Request“
and the binary input
„>Sync.release“
.
Note: The automatic reclosure function cannot be connected to the internal and exter-
nal synchrocheck at the same time !