INFLUENCE OF LOAD CURRENT ON BIPOLAR DC CORONA

Bipolar dc corona is known to be a strong function of conductor voltag e but little has been known about the influence of load current on bip olar corona. To evaluate the influence of load current, a bipolar cyli ndrical corona cage was constructed and operated with simulated dc loa d current flowing in the conductors. Measurements of load current, cor ona current, ion-current density, and conductor temperature showed tha t corona conductance was a function of load current. The dependence on load current was via temperature rather than magnetic field.