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INTRODUCTION
LUD 320 and LUD 450 are transistorised welding rectifiers intended for MMA (Manu-
al Metal Arc), MIG/MAG (semi--automatic) welding ,TIG welding and arc gouging.
LUD units are used in combination with a controller and wire feed unit
MEK 4C, MEK 44C, MEK 20C and MLC 30C.
The welding rectifiers are fan cooled, and fitted with a thermal cut--out to prevent
overheating.
The cut--out is reset automatically when the welding rectifier has cooled down.
See page 140 for details of ESAB’s accessories for the power source.
3.1
Setting control
All the settings are controlled by the PUA1 setting box.
For operating instructions see the programming manual
456 685--xxx.
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TECHNICAL DATA
LUD 320/320 W
LUD 320/320 W
Voltage
400V 3
~
50/60 Hz
230/400/500V 3
~
50Hz
208/230/460/475V 3
~
60 Hz
Permissible load at
100% duty cycle
60% duty cycle
270A / 30,8V
320A / 32,8V
270A / 30,8V
320A / 32,8V
Setting range
MIG/MAG
15A/15V(8V)--320A/30V
30A/15V(8V)--320A/30V
Setting range
MMA
16A/20V--320A/32,8V
10A/20V--320A/32,8V
Setting range
TIG
4A/10V--320A/22,7V
10A/10V--320A/22,7V
Open circuit voltage
MIG/MAG
65--80 V
65--80 V
Open circuit voltage
MMA/TIG
50--60 V
50--60 V
Open circuit power
520 W
520 W
Efficiency,
at max current
MIG/MAG
82%
MMA
84,5%
TIG
82%
MIG/MAG
82%
MMA
84,5%
TIG
84,5%
Power factor,
at max current
MIG/MAG
0,85
MMA
0,85
TIG
0,80
MIG/MAG
0,85
MMA
0,85
TIG
0,80
Enclosure class
IP 23
IP 23
Weight
kg
96/110
143/157
Dimensions
, lxwxh
910x642x835
910x642x835
Application classification
GB