Automatic Reclosing Function
Overview of Functions
The Automatic reclosing function:
•
Automatically closes overhead lines after arc short-circuits
•
Is only permissible for overhead lines, because only the possibility of self-activated extinguishing of an
arc short-circuit exists here
•
Can be controlled by integrated protection functions and by external protection devices
•
The automatic reclosing can occur through an external automatic reclosing function via binary inputs.
The automatic reclosing after switching off through a short-circuit protection is taken over by the automatic
reclosing function (AREC). The following figure shows an example for the normal procedure with a two-time
automatic reclosing where the second automatic reclosing attempt is successful.
[dw2awewz-090210-01.tif, 1, en_US]
Figure 6-285 Process Diagram of a Two-Time Reclosing With Action Time (2nd Reclosing Successful)
The integrated Automatic reclosing function allows for up to 8 reclosing attempts. Each of the 8 disruption
cycles can work with different parameters.
Structure of the Function
The automatic reclosing function is used in function groups for circuit breakers. In a function group for circuit
breakers, one of the 3 types of functions illustrated in the following figures can be used. The Automatic
reclosing function has a central function control.
[dwfktawe-100611-01.tif, 1, en_US]
Figure 6-286 Structure/Embedding of the Function
Cyclic Automatic Reclosing Function
The Cyclic automatic reclosing function (Figure 6-287) allows for up to 8 reclosing attempts. Here each disrup-
tion cycle may work with different settings.
6.45
6.45.1
6.45.2
Protection and Automation Functions
6.45 Automatic Reclosing Function
SIPROTEC 5, Overcurrent Protection, Manual 883
C53000-G5040-C017-8, Edition 07.2017
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