HEAVY-CURRENT TRANSFORMER, TRANSFORMER ELEMENT, CONTACT PLATE AND SECONDARY WINDING, AND METHOD FOR PRODUCING SUCH A HEAVY-CURRENT TRANSFORMER

摘要

The invention relates to a heavy-current transformer (12), in particular for a power source (10) for providing a welding current of a resistance welding device (1), comprising at least one primary winding (13) and at least one secondary winding (14) having a center tap. The invention also relates to a transformer element, a contact plate (29) and a secondary winding (14) for such a heavy-current transformer (12), and to a method for the production thereof. In order to reduce losses and improve the efficiency, at least four contacts (20, 21, 22, 23) are provided for forming a multi-point contacting, said contacts (20, 21, 22, 23) being formed by four contact surfaces, within which the at least one primary winding (13) and the at least one secondary winding (14) are arranged in a series/parallel circuit.