Function Description - Siemens 6MD85 Manual

Function Description

7.27.3
Logic
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Figure 7-192
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]
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Logic Diagram of the Thermal Overload Protection Function
Protection and Automation Functions
7.27 Thermal Overload Protection, 1-Phase
893