1. high frequency in plasma arc cutting (pac) – Miller Electric Spectrum 1250R User Manual
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OM-217 Page 30
SECTION 7 – HF IN PLASMA CUTTING
7-1.
High Frequency In Plasma Arc Cutting (PAC)
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high_freq2 4/95 – S-0753
1
Plasma Arc Torch
2
High-Frequency Voltage
Used inside torch to ionize gap
between electrode and tip to help
start the pilot arc.
3
Electrode
4
Pilot Arc
5
Tip
6
Shield Cup
1
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5
4
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6
2
Work
Plasma Arc Cutting (PAC)
7-2.
Sources Of High-Frequency Radiation From Incorrect Installation
50 ft
(15 m)
S-0754
Sources Of Direct High-Frequency
Radiation
1
High-Frequency Source (Plasma Arc
Cutting Power Source)
2
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
9
3
1
Cutting Zone
13
2
4
5
6
8
7
10
11, 12
14