Protection circuit on an arc welding device, for protection of the arc welding circuit

摘要

In order that the welding current which flows via undesired paths is cut off in the event of the connection between the welding current source (11) and the object (16) to be welded being poor or absent, a relay (23) which responds to a low voltage and produces the cutting-off is connected between the pole of the welding current source (11) that is to be earthed and a permanently earthed part or the protective earth conductor (PE) of the power supply. <IMAGE>