SECTION 8 – HIGH FREQUENCY (HF)
8-1. Welding Processes Using HF
| 2 |
| 1 |
| 1 |
Work | Work |
Gas Tungsten Arc | Submerged Arc |
Welding (GTAW) | Welding (SAW) |
1 HF Voltage
GTAW – helps arc jump air gap between torch and workpiece and/ or stabilize the arc.
SAW – helps arc reach workpiece through flux granules.
2 Flux
high_freq1 7/95 –
8-2. Sources Of HF Radiation From Incorrect Installation
Weld Zone
11, 12
50 ft
(15 m)
10 
9
8
7
3
13 | 2 |
| |
| 1 |
14
Sources Of Direct HF Radiation
1HF source (welding power source with
2Weld Cables
3Torch
4Work Clamp
4 | 5 | 6 |
5Workpiece
6Work Table
Sources Of Conduction Of HF
7Input Power Cable
8Line Disconnect Device
9Input Supply Wiring
Sources Of Reradiation Of HF
10Ungrounded Metal Objects
11Lighting
12Wiring
13Water Pipes And Fixtures
14External Phone And Power Lines
Syncrowave 250 |
