A compact current transformer is formed by arranging a pair of secondary windings on opposite sides of a single turn primary winding. A core is then wound about the primary winding and part of the secondary winding coils from a continuous roll of metal strap. The secondary windings are arranged on a pair of bobbins on opposite sides of the transformer core. A modular twin bobbin arrangement allows the secondary windings to be wound from a continuous source of transformer wire. The continuous wound core eliminates air gaps and improves magnetic transfer between the primary winding and the secondary winding. The continuous transformer wire eliminates the need for soldering or welding to connect between the two secondary windings.