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This Document Has Been Superseded
A newer publication replaces it: BSI BS 638-10
Arc welding power sources, equipment and accessories -- Specification for air cooled power sources for semi-automatic and automatic metal-arc welding
**Requirements for d.c. generators, alternators, a.c. transformers, and air cooled rectifiers power sources** of the drooping voltage characteristic type or the substantially constant voltage characteristic type.
**Requirements for driving motors or internal combustion engines for d.c. generators.**
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