[cfc-logik-handein-awe-steuerung-140503-kn, 1, en_US]
Figure 2-106
CFC logic for Manual Close with automatic reclosing via control
The selection list for parameter 7137 is created dynamically depending on the allocated switchgear compo-
nents. 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
this case.
Connection to the Internal Synchronism Check
The auto-reclose function can interact with the internal synchronization function of the device. If this is
desired as well as the Manual Close functionality, the CFC chart illustrated in
is a definite prereq-
uisite since the synchronization function always interacts with the control function. Additionally, one of the
four synchronization groups must be selected via parameter 7138
Internal SYNC
. The synchronization
conditions for automatic reclosure are are thereby specified. In that case the selected synchronization group
defines the switchgear component to be used (usually the circuit breaker
52Breaker
). The defined switch-
gear component 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
, is not required
and the parameter 7138 is set to
none
.
Automatic Reclosure with External Synchronism Check
Parameter 7139
External SYNC
can be set to determine that the automatic reclosure function operates
with external synchrocheck. An external synchronization is possible if the parameter is set to
YES
and the
device is connected to the external synchronization check via indication 2865
79 Sync.Request
and the
binary input
>Sync.release
.
Note: The automatic reclosure function cannot be connected to the internal and external synchrocheck at the
same time !
Initiation and Blocking of Automatic Reclosure by Protective Elements (configuration)
At addresses 7150 through 7164, and 7166 through 7174, reclosing can be started or blocked for various
types of protection functions. Together they constitute the wiring between protection elements and auto-
Functions
2.16 Automatic Reclosing System 79
248
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
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