SUMMARY
9
§2.4 Volt-Ampere Characteristic
TIG 320 400 AC/DC welding machine has an excellent volt-ampere characteristic, whose graph is
shown as the following figure. The relation between the conventional rated loading voltage U
2
and the
conventional welding current I
2
is as follows:
When I
2
≤600A
，
U
2
=10+0.04I
2
(V); When I
2
＞
600A,U
2
=34(V).
67
34
10
0
600
I
2
（
A
）
U
2
（
V
）
Working
point
Volt-ampere characteristic
The relation between the
conventional loading
voltage and welding current
