5
§2 SUMMARY
This operation manual is suitable for the models of GT-1600, 2000.
§ 2.1 Brief Introduction
GT- series welding machine is a general TIG arc welder which adopts the latest pulse width
modulation (PWM) technology and insulated gate bipolar transistor (IGBT) power module, which
can realize TIG operation and change work frequency to medium frequency so as to replace the
traditional hulking work frequency transformer with the cabinet medium frequency transformer.
Thus, it is characterized with portable, small size, light weight, low consumption and etc.
GT- series welding machine has good performance: constant current output, fast response, HF
striking arc, and the welding current can be adjusted steplessly and pre-set (The method of lifting
arc can reduce the waste of tungsten electrode. Meanwhile, this machine has the functions of long
or short TIG welding
、
current down-slope, arc force
、
hot-start and short-circuit protection).
GT- series welding machine can be applied to 110V/220V input and has the Power Factor
Corrector technology. The machine uses the APFC instrument to make the current wave
approaching the sine wave, which make the welder’s power factor to 0.99. So it is non-pollution to
the power net, and it improves the quality of the power supply. The welding machine possesses
additional function with remote controller. The remote can control the welding torch switch from
the top of remote box, and it also can adjust the welding current.
GT- series welding machines also have automatic protection functions with intelligent to
over-voltage, less-voltage, over-current, and over-heat. If any one of the above problems happens,
the alarm lamp on the front panel will be lighted and output current will be shut off automatically
to protect itself and prolong the equipment using life.
GT- series welding machine has MMA operation with hot start and arc force function. They
are suitable for all positions welding for various plates made of stainless steel, carbon steel,
alloyed steel, titanium, etc, which is also applied to pipe installment, mould mend, petrochemical,
architecture decoration, car repair, bicycle, handicraft and common manufacture.
T
IG——Tungsten Insert Gas welding;
MMA——Manual Metal Arc welding;
PWM——Pulse-Width Modulation;
IGBT——Insulation Gate Bipolar Transistor;
PFC——Power Factor Correction.
§2.2 Working Principle
The working principle of GT- series welding machines is shown as the following figure.
Single phase work frequency AC 220V
（
AC177-265V
）
or 110V
（
AC98-133V
）
(50/60 Hz) is
