Abstract: An arc fault protection circuit and method, provides arc fault protection in a multiphase power system by actuating a plurality of disconnect switches to disconnect the source from the load in response to detecting arcing proximate the load. As well, in response to detecting the arc, a plurality of impedances are introduced into the current path between said source and said load, with each of the impedances increasing the impedance between the source and the load along one phase, prior to the plurality of disconnect switches disconnecting the source from the load.