SECTION 7 – HIGH FREQUENCY
7-1. Welding Processes Requiring High Frequency
1
Work
TIG
1
TIG – helps arc jump air gap between torch and workpiece and/ or stabilize the arc.
high_freq 12/96 –
7-2. Incorrect Installation
| Weld Zone |
| 11, 12 |
50 ft |
|
(15 m) |
|
| 10 |
9 | 14 |
8 |
|
7
3
13 | 2 |
|
1
4 | 5 | 6 |
Sources of Direct High-Frequency Radiation
1
2Weld Cables
3Torch
4Work Clamp
5Workpiece
6Work Table
Sources of Conduction of High | Sources of Reradiation of High | ||
Frequency | Frequency | ||
7 | Input Power Cable | 10 | Ungrounded Metal Objects |
8 | Line Disconnect Device | 11 | Lighting |
9 | Input Supply Wiring | 12 | Wiring |
|
| 13 | Water Pipes and Fixtures |
|
| 14 | External Phone and Power Lines |