OM-284794 Page 41
SECTION 11 – HIGH FREQUENCY
11-1. Welding Processes Requiring High Frequency
OM-
SECTION 1 HIGH FREQUENCY
1
TIG
S-0694
13
9
8
7
1
2
4 5 6
3
10
11, 12
14
1 High-Frequency Voltage
TIG – helps arc jump air gap between torch
and workpiece and/or stabilize the arc.
11-2. Installation Showing Possible Sources Of HF Interference
Best Practices Not Followed
OM-
SECTION 1 HIGH FREQUENCY
1
TIG
S-0694
13
9
8
7
1
2
4 5 6
3
10
11, 12
14
Sources of Direct High Frequency
Radiation
1 High-Frequency Source (welding power
source with built-in HF or separate HF
unit)
2 Weld Cables
3 Torch
4 Work Clamp
5 Workpiece
6 Work Table
Sources of Conduction of High
Frequency
7 Input Power Cable
8 Line Disconnect Device
9 Input Supply Wiring
Sources of Reradiation of High
Frequency
10 Ungrounded Metal Objects
11 Lighting
12 Wiring
13 Water Pipes And Fixtures
14 External Phone And Power Lines
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