THT 152

Electronic power sources for ARC-AIR and MMA welding

High-power electronic DC power source for use in arc-air gouging and MMA welding with acid, low-hydrogen, stainless steel, aluminium and cellulose electrodes. Use: heavy structural steel works in the shipbuilding and offshore industry.
Welding process
  • Traditional
  • Three-phase
Manufacturing standard
  • EN 60974

The THT102 and THT 152 are thyristor-controlled welding machines designed for use in submerged arc welding with single-wire or twin-wire systems. Welding voltage can be adjusted either on the front panel of the machine or on the welding bead wire feeder. Welding current (Amps) can be adjusted on the wire feeder. The power source is characterized by a double-bridge rectifier which assures a very smooth arc and a perfect weld head at any current values. It can work either at constant voltage (flat characteristic)if used in submerged arc welding, or at contant current (sloping characteristic) if used for arc-air gouging.

Main voltage 3x400 V
50-60 HZ
Delayed line fuse 125 A - 400 V
Max. absorbed power 89 kVA
Current range 70÷1500 A
Duty factor 100% 1500A
MIG/MAG No-load voltage 20÷46 V
MMA No-load voltage 95 V
Ø submerged arc wire 2.4÷6.0
Ø arc-air electrodes 5.0÷19.0
Protection class IP23S
Weight 550 kg
Dimension (WxDxH) 590x1100x1200 mm
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Main voltage

Delayed line fuse

Max. absorbed power

Current range

Duty factor

MIG/MAG No-load voltage

MMA No-load voltage

THT 152

3x400 V
50-60 HZ

125 A - 400 V

89 kVA

70÷1500 A

100% 1500A

20÷46 V

95 V

THT 102

3x400 V
50-60 HZ

80 A - 400 V

59 kVA

70÷1000 A

100% 1000A