Current transformer having a rectangular iron core

摘要

A current transformer comprises coil forms mounted on two opposite legs of a rectangular iron core, and insulating parts for insulating the iron core from a current bar which can be brought through the interior of the current transformer. The coil forms are connected together at both ends by an insulating part which surrounds at least partially the exposed legs of the iron core in U-fashion. For manufacturing a current transformer, the coil forms are first connected by assembling the insulating parts to the coil forms to form a frame into which L-shaped laminations are inserted to form the iron core. These laminations are connected at the abutting gaps by a welded seam. The current transformer is suitable particularly for use in low-voltage circuit breakers.