Rockwell Automation 141A Mounting System Temperature Rise Calculation Software Tutorial - Manual (Page 19)

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Th e constants k, c and f are determined according to IEC 60890, they are required for the
calculation of the heat dissipation excess.
Th ese numeric values don’t have any units of measure.
IEC 60890 Details
Selecting the [ IEC 60890 Details ] button will display the calculation parameters in
accordance with IEC 60890.
2.4
“Temperature Rise
According to
IEC 60890” Tab
(continued)