2.10 Automatic Reclosure Function (optional)
123
7SD610 Manual
C53000-G1176-C145-4
Figure 2-43 Timing diagram of a double-shot reclosure with action time (2nd reclosure successful)
The integrated automatic reclosure function allows up to 8 reclosure attempts. The
first four reclose cycles may operate with different parameters (action and dead times,
single-/three-pole). The parameters of the fourth cycle apply to the fifth cycle and on-
wards.
Activation and
deactivation
The automatic reclosure function can be switched on and off by means of the param-
eter 3401 AUTO RECLOSE, via the system interface (if available) and via binary inputs
(if allocated). The switch states are saved internally (refer to Figure 2-44) and secured
against loss of auxiliary supply. It is only possible to switch on from the source from
where it had previously been switched off. To be active, it is necessary that the function
is switched on from all three switching sources.
Alteration of the switching state via setting or system interface is not possible during a
running fault.
Figure 2-44 Activation and deactivation of the auto-reclosure function
Selectivity before
Reclosure
In order for the automatic reclosure to be successful, all faults on the entire overhead
line must be cleared at all line ends simultaneously — as fast as possible.
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