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3.6 Torch Illustration
The torch is composed by torch stand, connecting cable and handle. Torch stand is the interface of torch and wire feeding device.
Connecting cable: covered by nylon pipe the liner is loaded in the center of coreless cable. The inner part of liner is the passage
for wire feeding. The space between liner and coreless cable is the passage for shielded gas. Coreless cable is the passage for
current.
There is a gooseneck installed in the handle of the torch. In the back part of the torch there is a connecting with the coreless cable
and in the front part is a shunt. The shielded gas distributes via the shunt and forms well-proportioned air current in the nozzle,
and then spurt out in a form of air hanging. Set with a sensitive switch on the handle to control the welding current.
3.7 Symbol chart
X
I
1
I
2
Ground
Descending
ARC welder
Single phase
AC power source
Single phase stillness
transducer---transformer---rectifier
MIG
DC current
Positive electrode
Negative electrode
Duty cycle
Rated Input Current
Output current
P
Rated Input Power
1
U
No-load voltage
0
U
Power voltage
1
U
Rated Output Voltage
2
Hertz (cycles/sec)
Voltage
Amperage
KVA
Power (KVA)
%
Duty cycle
IP21
Case protection class
H
Insulation grade.
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