2 INTRODUCTION
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© ESAB AB 2018
2 INTRODUCTION
LAF 631 is a remote-controlled 3-phase welding power source designed for high-efficiency
mechanical gas metal arc welding (MIG/MAG) or sub arc welding (SAW).
The welding power source is fan-cooled and is monitored by a thermal cutout against
overload. When the thermal cutout is deployed the yellow lamp on the front panel illuminates
automatically. The reset is carried out automatically when the temperature has decreased to
a permitted level.
The welding power sources and the control unit are linked together over a 2-wire bus
enabling precision control of the welding process.
All welding parameter settings for the power source can be made by the operator on the front
panel of the control unit.
The operation of the power source is completely controlled and monitored by this unit. Even
the start and stop qualities can be set by way of the control unit. The preset welding current
parameters can also be monitored in the course of welding.
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