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4.3.1.2 IEC Thermal Overload Protection Curves
IEC Thermal Overload Protection formula and sample curves according to this formula are
parameters. When setting ranges for these parameters are considered, it is calculated that 400
Series relay can run 1,540,000 unique IEC Thermal Overload Protection curves; for its
impossible to demonstrate all of the curves on a chart, sample curves are given on the below
chart to express an overview of the characteristic
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