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Functions
2.4 Load Restoration
2.4
Load Restoration
The Load Restoration has the task to reconnect elements of the system automatically, which have been
disconnected due to overload. Overload causes the network frequency to drop, which is detected by the
underfrequency protection and leads to separation of system components.
Functional Description
2.4.1
General
The load restoration function has 4 independently adjustable load restoration elements. Elements of the load
restoration are switched on or off separately by parameters. Every element can be assigned up to 4 underfre-
quency elements, which start the load restoration when tripped.
The process can be canceled via the binary input
The binary input
The binary input
Started elements are processed in descending order. The highest number element connects first. You may find
an example in the instructions manual.
The Load Restoration can be applied across several 7RW80 devices. The Load Restoration across several
devices can be coordinated using the CFC. The procedure is described in the instructions manual.
The following figure gives an overview of the load restoration's functionality.
[7rw80-uebersicht-20100525, 1, en_US]
Figure 2-6
50
>LR Break breaks the load restoration process.
>LR Reset resets external blocking or a blocked monitoring.
Load Restoration - Overview
>LR Block .
C53000-G1140-C233-4, Edition 07.2018
SIPROTEC 4, 7RW80, Manual
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