Vector Welding C-Series Operating Instructions Manual page 39

DC PULSE SERIES EQUIPMENT
Summary
2) The workpiece gets little heat. Arc energy is focused. Be suitable for thin sheet
and super thin sheet welding.
3) Exactly control heat input and the size of the molten pool. The depth of penetration
is even. Be suitable for welding by one side and forming by two sides and all position
welding for pipe.
4) High frequency arc can make metal for microliter fabric, eliminate blowhole and
improve the mechanical performance of the joint.
5) High frequency arc is suitable for high welding speed to improve the productivity.
T231/T331 –series welding machines is suitable for all positions welding for
various plates made of stainless steel, carbon steel, alloyed steel, titanium, magnesium,
cuprum, etc, Which is also applied to pipe installment, mould mend, petrochemical,
architecture, decoration, car repair, bicycle, handicraft and common manufacture.
MMA-------Manual Metal Arc Welding
PWM-------Pulse-Width Modulation
IGBT--------Insulation Gate Bipolar Transistor
TIG----------Tungsten Insert Gas Welding
1.2 Working Principle
The working principle of T231/T331 welding machines is shown as the following
figure. Single-phase 230V work frequency AC is rectified into DC(about 312 V), then
is converted to medium frequency AC (about 20-40KHz) by inverter device (IGBT module),
after reducing voltage by medium transformer (the main transformer) and rectifying
rectifying by medium frequency rectifier (fast recovery diodes),then is outputted DC .The
circuit adopts current feedback control technology to insure current output stably.
Meanwhile, the welding current parameter can be adjusted continuously and steplessly
to meet the requirements of welding craft.
230V
68
DC PULSE SERIES EQUIPMENT
1.3 Volt- Ampere Characteristic
T231/T331 welding machine has an
excellent volt-ampere characteristic,
whose graph is shown as the following
figure. The relation b e t w e e n the
conventional rated loading voltage U
2
and the conventional welding current
I is as follows:
2
When I ≤600A, U =10+0.04I (V);
2 2 2
When I >600A,U =34(V).
2 2
1.4 Specifications T231/T331
Description
Weight
Power Source Dimensions H395mmxW180mmxD370mm
Cooling
Welder Type
Inverter Power Source
European Standards
EN 60974-1 / IEC 60974-1
Number of Phases
Nominal Supply Voltage
Nominal Supply Frequency
Welding Current Range
(DC STICK Mode)
Welding Current Range
(DC TIG Mode)
Effective Input Current
Maximum Input Current
Single Phase Generator
Requirement
200A @ 60%, 28V
STICK (MMA)
Welding Output, 40ºC, 10 min.
110A @ 100%, 24.4V
200A @ 60%,18V
TIG (GTAW)
Welding Output, 40ºC, 10 min.
155A @ 100%, 16.2V
Open circuit voltage
Protection Class
Summary
T231 T331
10.9 kg 19.6 kg
H515mmxW220mmxD380mm
Fan Cooled Fan Cooled
Inverter Power Source
EN 60974-1 / IEC 60974-1
1 3
230V +/- 15% 400V +/- 15%
50/60Hz 50/60Hz
5 - 200A 30 - 250A
5 - 200A 10 - 300A
32.3A 8.6A
41.7A 13.7A
14.4kVA 14.2KVA
250A @ 40%, 30V
158A @ 100%, 26.3V
300A @40%, 22V
190A @ 100%, 17.6V
66V DC
66V DC
IP23 IP23
69