NOTE
In contrast to the Circuit-breaker switching device, the Disconnector switching device cannot contain any
additional functions because protection functions or synchronization can have no effect on the discon-
nector.
The following figure shows the structure of the Disconnector switching element:
[dwdiscon-190612-01.tif, 2, en_US]
Figure 8-18
Control-Relevant Function Blocks of the Disconnector Switching Device
The Disconnector switching device behaves like the Circuit-breaker switching device. The only difference is
the designation of the function block that the physical switch provides (disconnector instead of circuit
breaker). Blocking by protection is not provided in the analysis of the Control function block.
The Disconnector switching device is available in the DIGSI 5 library in 2 different variants:
•
Disconnector with 3-pole connection
The device switches all 3 poles of the disconnector on or off simultaneously.
•
Disconnector without triggering (only status detection, no control)
This variant is rarely encountered. It is encountered with grounding switches that frequently cannot be
controlled, but only provide their current position. In addition, the position of a disconnector in a neigh-
boring bay can be acquired.
Control Functions
8.2 Switching Devices
SIPROTEC 5, Overcurrent Protection, Manual 1095
C53000-G5040-C017-8, Edition 07.2017
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