# myCableEngineering Calculation

## Calculation Method

Calculation of impedance is reasonably involved. Other notes give an insight into the individual calculations. With myCableEngienering, the calculation will typically follow the following procedure

**d.c. resistance**- is determined using IEC60288. For any cases in which IEC 60228 is not suitable, the resistance is obtained using CENELEC CLC/TR 50480. See also Conductor Resistance.**temperature adjustment**- the calculated d.c. is adjusted so that is value is accurate relative to the operating temperature of the conductor.**a.c. resistance**- the a.c. resistance is obtained by applying skin and proximity effect factors as defined in IEC 60287. See also Conductor Resistance.**positive and zero sequence impedance**- are calculated using the methods give in IEC 60909 and resistance values calculated above. See also Impedance.

### Resistance, Reactance

Positive and zero sequence impedances calculated above, are in complex form. The real part of the impedance gives the resistance and the imaginary part the reactance.

### Capacitive Reactance

Current we do not calculate capacitive reactance. This will likely be added as the application grows and develops the need for capacitive reactance.