Electronic – Corona discharge insulation

coronadischargeinsulation-voltage

If a wire is insulated from arcing up to 10 kilovolts, is it insulated up to twice that much from corona discharge? Because I’m imaging that for corona discharge to occur, the electricity has to flow outwards by the repulsion of like charge, so it would have to flow through two 10 kv wire insulation layers. So one like charge would be pushed out through one direction while another like charge is pushed through the insulator in the opposite direction, making it as if the barrier was insulated to 20kv.

Best Answer

No,it doesn't work that way. Charge and voltage are two separate things. 10 kV is 10 kV, and whether it results in an arc or corona discharge (also a kind of arc) is irrelevant.

Separation of charges results in an electric field. "Voltage" is one way of describing the potential energy of charges in that field.

Corona discharge and other kinds of arcs occur when the electric field intensity (a function of both voltage and geometry) becomes high enough to strip electrons off of atoms in the air (or other insulator).