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3 INTRODUCTION
DTB 250 is a thyristor controlled dual power source, for AC and DC welding.
Two welding methods can be used: TIG or MMA.
DTB 250 is supplied with wheels at the rear and castors at the front, plus a shelf for
a gas bottle and a water cooling unit.
OKC coupling and power cable*.
(* Power cable for 400V mains supply or higher).
3.1 TECHNICAL DATA
Maximum load
AC/DC MMA
100% duty cycle 95A/24V
60% duty cycle 145A/26V
35% duty cycle 200A/28V
Maximum load
AC/DC TIG
100% duty cycle 95A/14V
35% duty cycle 200A/18V
20% duty cycle 250A/20V
Settings range TIG 5A/10V--250A/20V
Settings range MMA 20A/21V--200A/28V
Max. open circuit voltage 65V AC, 71V DC
MMA 200A AC
Power factor 0.69
Efficiency 0.63
TIG 250A AC
Power factor 0.62
Efficiency 0.51
Open circuit power 300W
AC balance 40--60%
Slope --up 0.5--10s
Slope --down 0.5--10s
Gas post--flow 0.5--30s
Enclosure class IP 21
Weight 145 kg
Dimensions lxbxh 1180/745/965
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This power source complies with the requirements of IEC 974--1 and EN 60974--1.
Equipment marked IP 21 is intended for indoor use.
GB
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