Transformer6 - 17The "Temperature Compensation for Cu" OptionOption selectedProvides two more parameters to enter:Depending on these two parameters, the reference resistance (Rref,temperature-compensated winding resistance) is calculated:Option clearedFor the winding resistance measurement there is no temperature compensationtaken into consideration.Once all settings are defined, press the I/O (test start/stop) push-button to startthe test.When the measurements are taken, finish the test by assessing it.To learn more about test assessment, refer to ”Test Assessment” on page 10-2.Tmeas: ambient temperatureTref: operating temperature of test object, that is, the powertransformer’s secondary windingRref: In Centigrade:Rref = (VDC / IDC) x (235°C + Tref) / (235°C + Tmeas)In Fahrenheit:Rref = (VDC / IDC) x (391°F + Tref F) / (391°F + Tmeas F)Note: Formula according to IEC 60076-1.
