Differential current transformer

摘要

A differential current transformer comprises a sensor coil 4 having a substantially cylindrical form, and a pair of current conductors having opposite current directions. Said current conductors, when powered, give a substantially balanced magnetic configuration relative to a magnetic neutral axis within the sensor coil core. Said conductors comprise conductive layers in a printed circuit board 61. Each conductor comprises at least a pair of conductive layers. The layers of the conductors are arranged parallel to each other, with both an upper and a lower layer. Layers having identical current flow direction are connected through vias.