EN ISO 669:2016

European foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Physical environment and operating conditions
6 Test conditions
7 Rated no load voltage at the output
8 Maximum short circuit current
9 Thermal rating
10 Cooling liquid circuit (liquid cooled welding equipment)
11 Static mechanical characteristics
12 Rating plate
13 Instruction manual
Annex A (informative) - Examples of rating plates
Bibliography

ISO 669:2016 defines and specifies certain identified electrical and mechanical characteristics of equipment used for- resistance spot welding,- projection welding,- resistance seam welding,- upset welding[1], and? flash welding[2].ISO 669:2016 specifies the information to be given in equipment specifications and the test methods to be used for measuring those characteristics.Not all requirements apply to all types of equipment.The following types of power sources are included:- single phase with alternating welding current;- single phase with rectified welding current by rectification of the output of the welding transformer;- single phase with inverter welding transformer;- three phase with rectified welding current by rectification of the output of the welding transformer;- three phase with a current rectification in the input of the welding transformer (sometimes called frequency convertor);- three phase with inverter welding transformers.ISO 669:2016 Standard does not apply to welding transformers that are separate from the equipment.NOTE Safety requirements for resistance welding equipment are covered by IEC 62135?1.[1] Often referred to by the non-preferred term, butt welding.[2] Often referred to by the non-preferred term, flash butt welding.