Electrical Engineering ⇒ Topic : Percentage Resistance, Reactance, and Impedance

PERCENTAGE RESISTANCE, REACTANCE, AND IMPEDANCE

These quantities are generally calculated by the voltage drop at full-load current in terms of

normal voltage of the winding on which calculations are made.

(1) Percentage resistance at full load is given by

               ............... (1)

(2) Percentage reactance at full load is given by

                  ................. (2)

(3) Percentage impedance at full load is given by

               .................... (3)

If % R or % copper loss and % X are given, the resistance and reactance can be easily calculated as follows:

                        ..................... (4)

                      ....................... (5)

                            ................... (6)

                           ....................... (7)