Siemens 7SC80 Manual page 280

Functions
2.14 Automatic Reclosing System 79
Delay of Dead Time Start
The dead time start can be delayed by pickup of the binary input message 2754
maximum time for this can be parameterized under 7118 T DEAD DELAY. The binary input message must be
deactivated again within this time in order to start the dead time. The exact sequence is described in the func-
tional description at margin heading "Delay of Dead Time Start".
Number of Reclosing Attempts
The number of reclosing attempts can be set separately for the "phase program" (address7136, # OF RECL.
PH) and "ground program" (address 7135 # OF RECL. GND). The exact definition of the programs is
described in the functional description at margin heading "Reclosing Programs".
Close Command: Direct or via Control
Address 7137 Cmd.via control can be set to either generate directly the close command via the automatic
reclosing function (setting Cmd.via control = none) or have the closing initiated by the control function.
If the automatic reclosure function is to be closed via the control function, the manual closing command has
to be suppressed during an automatic reclose command. The example in the Section
MANUAL CLOSE for commands via the integrated control function has to be extended in this case (see
Figure 2-100). The messages 2878
has been started and wants to carry out a reclosure after the dead time. The annunciations set the flipflop and
suspend the manual signal until the AR has finished the reclosure attempts. The flipflop is reset via the OR-
combination of the annunciations 2784
Successful . Manual closing is initiated if a CLOSE command comes from the control function.
[cfc-logik-handein-awe-steuerung-140503-kn, 1, en_US]
Figure 2-100
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
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
directly which must be allocated to the associated contact. The CFC chart as in
this case.
280
79 L-N Sequence and 2879 79 L-L Sequence indicate that the AR
79 is NOT ready , 2785 79 DynBlock and 2862 79
CFC logic for Manual Close with automatic reclosing via control
>79 DT St.Delay . The
2.2.12 Setting Notes
52Breaker , reclosure is
79 Close
Figure 2-100 is not needed in
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
of a