1.1 This standard lays down the requirements, tests and service conditions for dc arc welding ( rotary) generators with drooping characteristics for manual, semi-automatic and automatic single metal-arc welding, and with windings with Class A, E, B, F or H insulation (see IS : 1271-1958〓).
1.2 Single metal arc welding generator with ' constant potential' output, as opposed to ' drooping characteristics ', is not covered by this standard.
1.3 Generators covered by this standard are assigned ratings on the basis of duty cycle.
IS 2635-1975 history
1976IS 2635-1975 Specification for DC welding generators