Primary conductor for a transformer

A transformer typically includes two or more inductively coupled windings that effect the transfer of electric energy from one circuit to another with a change in voltage, current, phase, or other electric characteristic. Transformers are used in many different electrical devices. For example, transformers are used in modern circuit breaker devices for sensing current in an electrical distribution circuit and providing a signal indicative of the sensed current to electronic circuitry, known as a trip unit, housed in the circuit breaker. A transformer includes a core having an aperture formed therein and a conductive bar extending through the core. The aperture in the core has a centroidal axis The conductive bar includes: a first surface extending generally parallel to the centroidal axis, a second surface opposite the first surface and extending generally parallel to the centroidal axis, the first surface being closer than the second surface to said centroidal axis. The conductive bar also includes means for diverting electrical current flowing through the conductive bar towards said first surface.