Table of Contents
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Contents
1 Introduction ........................................................................................................................................................ 3
2 Resistor Thermal Overload Protection ............................................................................................................... 3
2.1
Fault Setting Principles ............................................................................................................................ 3
2.2
Setting Example ....................................................................................................................................... 5
3 Resistor Open Circuit Protection ........................................................................................................................ 7
3.1
Fault Setting Principles ............................................................................................................................ 7
3.2
Setting Example ....................................................................................................................................... 7
Figures
Figure 1 - Exponential heating and cooling curves .................................................................................3
Figure 2 - IEC60255-8 cold curve (tau in seconds).................................................................................4
©2010 Siemens Protection Devices Limited
MSCDN - MP2A Applications Guide
Chapter 5 Page 2 of 7
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