Method for preventing fast burning of a welding wire

摘要

A method for preventing fast burning of a welding wire, which is driven by a direct-current motor via wire feed rollers, during arc welding in the event of mains power supply failure is characterised in that relay switching operations, which are initiated by the mains power supply failure, ensure the voltage supply for the direct-current motor and for the necessary switching apparatuses from a buffer battery. <IMAGE>