EVS-EN ISO 669:2016

This International Standard defines and specifies the [general] electrical and mechanical characteristics for equipment used for: Resistance spot welding; Projection welding; Resistance seam welding; Resistance butt welding; This Standard includes information to be given in equipment specifications, and specifies the test methods to be used for measuring those characteristics. This International Standard applies to resistance welding equipment, to guns with integrated transformers and to complete movable welding equipment. The following types are included: - single phase equipment with alternating welding current; - single phase equipment with rectified welding current by rectification of the output of the welding transformer; - single phase equipment with inverter welding transformer; - three phase equipment with rectified welding current by rectification of the output of the welding transformer; - three phase equipment with a current rectification in the input of the welding transformer (sometimes called frequency convertor); - three phase equipment with inverter welding transformers. This Standard does not apply to welding transformers separate from the equipment. Electrical safety requirements for resistance welding equipment are covered by IEC 62135-1.