Lincoln Electric IM10178 POWER FEED 84 U.I. CONTROL BOX - Manual (Page 31)

A-24
INSTALLATION POWER FEED 84, POWER FEED 84 DUAL
elecTrical insTallaTion
Weld cables, coaxial
(See Figure A.30)
Coaxial welding cables are specially designed welding cables for
STT™ and pulse welding. Coaxial weld cables feature low
inductance, allowing fast changes in the weld current. Regular cables
have a higher inductance which may distort the STT™ waveshape.
Inductance becomes more severe as the weld cables become longer.
Coaxial cables work best for high performance waveforms and when:
• long cables are present
• the cables are housed in a metal tray
A coaxial weld cable is constructed with multiple small leads wrapped
around one large lead. The large inner lead connects to the electrode
stud on the power source and the electrode connection on the wire
feeder. The small leads combine together to form the work lead, one
end attached to the power source and the other end to the work
piece.
To install:(See Figure A.31)
1. Turn the input power off at the welding power source.
2. Connect one end of the center lead to the power source electrode
connection, and the other end to the wire feeder electrode
connection.
3. Connect the outer lead bundle to the power source work
connection, and the other end to the work piece. Minimize the
length of any work lead extension for best results.
4. Insulate all connections.
ELECTRODE
WORK
FIGURE A.30
FIGURE A.31
Electrode Electrode W Work ork
Electrode Electrode
W Work ork
Power Source Power Source
Coaxial W Coaxial Weld Cable eld Cable
Wire Feeder Wire Feeder
TABLE A.1
RECOMMENDED CABLE SIZES (RUBBER COVERED COPPER - RATED 75°C)**
COAXIALCABLELENGTH
AMPERES
250
300
350
DUTY
CYCLE
100%
60%
60%
0 to 25Ft.
(0 to7.6M)
1
1
1/0
25 to 50Ft.
(7.6 to 15.2M)
1
1
1/0
50 to 75 Ft.
(15.2 to 22.9M)
1
1
--
75 to 100 Ft.
(22.9 to 30.5M)
1
1/0
--
**Tabledvaluesareforoperationatambienttemperaturesof104°F(40°C)andbelow.Applicationsabove104°F(40°C)mayrequirecables
largerthanrecommended,orcablesratedhigherthan167°F(75°C).