Reduces the main supply voltage

Increase the main supply voltage

Convert DC into AC

Convert AC into DC

External Induction

Mutual Induction

Core Induction

Mutual Reduction

Less initial cost

Less maintenance cost

Not suitable for welding of Non-ferrous metals

Freedom from Arc blow

Reduces AC voltage

Increases AC voltage

Convert AC into DC

Increases AC current

Higher working efficiency

Lower working efficiency

No noise

Less maintenance cost