Function Description
Logic
[lotolp1p-250713-01.tif, 2, en_US]
Figure 6-173
Logic Diagram of the Thermal Overload Protection Function
Thermal Replica
The protection function calculates the overtemperature from the current flowing in the protected object (for
example, reactor or resistance in the transformer neutral point) on the basis of a thermal single-body model
according to the thermal differential equation with
[fodiffgl-310510-01.tif, 2, en_US]
6.21.3
Protection and Automation Functions
6.21 Thermal Overload Protection, 1-Phase
SIPROTEC 5, Overcurrent Protection, Manual 677
C53000-G5040-C017-8, Edition 07.2017
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