Electrical phase to which a Protection is referring to. Unlike Commands and Measurements, which have their phase configuration directly in the Template (standardization), in Protections the phase is linked to the object's instance, partly to decrease the number of Protections needed (users do not need to create one Protection for each phase), but also because many Protections belong to the device as a whole. Possible values for this property are -1: epNone, 0: epABC (default), 1: epA, 2: epB, 3: epC, 4: epNeutral, 5: epAB, 6: epBC, 7: epCA, or 8: epDevice.