OM-245 849 Page 20
SECTION 8 − HIGH FREQUENCY
8-1. Welding Processes Requiring High Frequency
high_freq 7/05 − S-0693
1 High-Frequency Voltage
TIG − helps arc jump air gap
between torch and workpiece and/
or stabilize the arc.
1
TIG
Work
8-2. Incorrect Installation
50 ft
(15 m)
S-0694
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
Weld Zone
13
9
8
7
1
2
4 5 6
3
10
11, 12
14
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