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Transweld 400

Air Cooled Welding Transformer

ESAB Transweld 400

is a Manual Arc Welding Transformer that combines unique functionality and safety features. It is economical, natural cooled and delivers excellent welds. It is rugged dependable and suitable for shop or site use



  • Fully portable, light weight and compact
  • Natural air cooled machine ensures maximum safety of transformer as opposed to fan-cooled where fan-failure can cause burning of coils
  • Higher metal recovery ensures lower consumption of electrodes
  • Current available in single range. Current indicator and current control handle both on front panel
  • Superior dynamic characteristics gives soft and smooth arc, minimum spatter
  • Robust and compact construction ability to withstand rough handling at sites
  • Horizontal shunt core travel ensures precise setting even after prolonged use
  • Ultra light weight for easy maneuverability
  • Class 'H' insulation provides longer coil life
  • Linear current indicator scale enables easy current setting
  • Low no-load loss
Technical Data Transweld 400
Voltage (Volts ± 10%, frequency) 415V, 50Hz
(2 lines of 3 phase)
AC Rated Input Current 63 Amps
Rated KVA (Max) 26
Open Circuit Voltage Volts AC (Max) 80V
Welding Current Range MMA AC 50-400A
Maximum Current AC 400A
Welding current control type Stepless
Insulation Class ‘H’
Cooling Natural air cooled
Net Weight (Approx) 115 kg.
Dimension LxHxW mm (Approx) 600 x 410 x 720
Ordering Information  
Power source only 461-0641-400
Click here to view manual of Transweld 400 in PDF format (470 KB)