IS 7931 Pt.2-1975
Specification for automatic and semi-automatic welding equipment with self-regulating arc (MIG/MAG process) Part II Transformer-rectifier power supplies

Standard No.

IS 7931 Pt.2-1975

Release Date

1976

Published By

IN-BIS

Latest

IS 7931 Pt.2-1975

Scope

1.1 This standard ( Part II) covers transformer-rectifier power source of the substantially flat load characteristics type incorporating monocrystalline and polycrystalline rectifiers for semiautomatic and automatic arc welding with self-adjusting arc ( MIG/MAG processes). Equipment covered by this standard will normally be of the air cooled or forced air cooled type. 1.1.1 This standard does not cover oil cooled transformer rectifier power source. 1.2 The windings of transformer-rectifiers covered by this standard are of insulation classes A, E, B, F and H. 1.3 Welding transformer-rectifier covered by this standard are assigned ratings on the basis of duty cycle.

IS 7931 Pt.2-1975 history

• 1976 IS 7931 Pt.2-1975 Specification for automatic and semi-automatic welding equipment with self-regulating arc (MIG/MAG process) Part II Transformer-rectifier power supplies