Miller Maxstar 200 DX, Руководство пользователя

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OM-2226 Page 60
SECTION 9 − HIGH FREQUENCY (HF)
9-1. Welding Processes Requiring High Frequency
1 High-Frequency Voltage
TIG − helps arc jump air gap
between torch and workpiece and/
or stabilize the arc.
1
TIG
Work
9-2. Correct Installation
1 HF Source (Welder With Built-In HF Or
Separate HF Unit)
Ground metal machine case, work output
terminal, line disconnect device, input
supply, and worktable.
2
Welding Zone And Centerpoint
A circle 50 ft (15 m) from centerpoint
between HF source and welding torch in all
directions.
3
Weld Output Cables
Keep cables short and close together.
4
Conduit Joint Bonding And Grounding
Electrically join (bond) all conduit sections
using copper straps or braided wire. Ground
conduit every 50 ft (15 m).
5 Water Pipes And Fixtures
Ground water pipes every 50 ft (15 m).
6 External Power Or Telephone Lines
Locate HF source at least 50 ft (15 m) away
from power and phone lines.
7
Grounding Rod
Consult the National Electrical Code for
specifications.
8 Metal Building Panel Bonding Methods
Bolt or weld building panels together, install
copper straps or braided wire across seams,
and ground frame.
9
Windows And Doorways
Cover all windows and doorways with
grounded copper screen of not more than
1/4 in (6.4 mm) mesh.
10 Overhead Door Track
Ground the track.
1
2
50 ft
(15 m)
Weld Zone
3
6
50 ft
(15 m)
7
4
7
5
Ground
Workpiece
If Required
By Codes
Ground All
Metal Objects
And All Wiring
In Welding Zone
Using #12 AWG
Wire
Nonmetal
Building
8
10
9
Metal Building
7
7