1.Brief Introduction
MMA welder uses imported IGBT and fast recovery diodes as main electric components. It is supplemented by a specially developed main PCB board. In addition, the uniform regulation of welding current has been designed to guarantee the arc reach good welding process adaptability. What's more, its perfect dynamic protection features ensure that it is safe and reliable when use. It is ideal for using low carbon steel, stainless steel, alloy steel etc.
MMA Features:
1.25% high duty cycle.
2.Lower cost operation, more portable, more compact, superior output.
3.Excellent arc properties and solution droplet transfer.4.With the protections of over-heating, over-voltage, over-current.5.Digital display function when use (only for plastic shell).
6.Plastic handle makes it easy to carry.
7.Convenient quick connection for the output makes it quick, safe, simple and stable.
*NOTES: The above description may be modified without prior notice such as omissions, unclear statements about this welder.
2.Technical Description
2.1 Environment
* Working temperature: -10ºC~40ºC.
* Transportation and storage: -25ºC~55ºC.
* Relative air humidity: 40ºC≤50%; 20ºC≤90%.
* The dust, acids, corrosive gases and substance in the ambient air must be lower normal level except those from welding process.
* Altitude must be less than 1km.
* Keep good ventilation at a distance of 50cm around.
* Put it in somewhere the speed of wind not less than 1m/s.
2.2 Input Power
* Power supply waveform should be sine wave and frequency fluctuations with less than +-1% of its rating.
* The fluctuations of input voltage must be lower than +-10% of the rated value.
2.3 Equipment Principle
*NOTES: This is inverter technology. The main part as follow:
Rectifier → Filter → IGBT → Transformer → Rectifier → Choke
2.4 Equipment Structure
The MMA Inverter DC MMA Welder uses portable cabinet structure: the upper part of front panel has been equipped with welding current adjustment knob, power indicator (green), abnormal indicator (yellow). The output terminal is fitted with quick connector both "+" and "-". The back panel owns power switch, motor fan, input power cable. The inside body of the machine includes PCB main board, electronic components, radiator etc.
2.5 Guide for Marking Models
It means MMA-160 is an Inverter MMA (Manual Metal Arc Welding) welding machine and its rated output current can reach 160A.
2.6 Parameter
| Item/Model |
MMA-120 |
MMA-140 |
MMA-160DS |
MMA-180DS |
MMA-200DS |
MMA-220DS |
| Rated Input Voltage (V) |
230±10% |
230±10% |
230±10% |
230±10% |
230±10% |
230±10% |
| Frequency (Hz) |
50/60 |
50/60 |
50/60 |
50/60 |
50/60 |
50/60 |
| Rated Input Capacity (KW) |
5.0 |
5.9 |
6.9 |
7.8 |
9.2 |
9.5 |
| Rated Input Current (A) |
21.8 |
26 |
30 |
34 |
40 |
49 |
| Rated Duty Cycle |
40% @ 120A |
40% @ 140A |
40% @ 160A |
40% @ 180A |
40% @ 200A |
40% @ 220A |
| No Load Voltage (V) |
67 |
67 |
67 |
67 |
67 |
67 |
| Output Current Range (A) |
10~120 |
10~140 |
10~160 |
10~180 |
10~200 |
10~220 |
| Efficiency (%) |
≥85 |
≥85 |
≥85 |
≥85 |
≥85 |
≥85 |
| Protection Class |
IP21S |
IP21S |
IP21S |
IP21S |
IP21S |
IP21S |
| Insulated Grade |
H |
H |
H |
H |
H |
H |
| Electrode Size (mm) |
1.6~3.2 |
1.6~3.2 |
1.6~4.0 |
1.6~4.0 |
1.6~4.0 |
1.6~5.0 |
| Cooling Type |
AF |
AF |
AF |
AF |
AF |
AF |
| Overall Dimension (mm) |
312*120*183 |
312*120*183 |
312*120*183 |
312*120*183 |
312*120*183 |
312*120*183 |
| Net Weight (KG) |
3.5 |
3.5 |
3.7 |
3.8 |
4.2 |
5.0 |
| Item/Model |
MMA-145H |
MMA-160H |
MMA-200H |
MMA-160HL |
MMA-200HL |
| Rated Input Voltage (V) |
230±10% |
230±10% |
230±10% |
110\220±10% |
110\220±10% |
| Frequency (Hz) |
50/60 |
50/60 |
50/60 |
50/60 |
50/60 |
| Rated Input Capacity (KW) |
6.6 |
6.9 |
9.2 |
6.9 |
8.1 |
| Rated Input Current (A) |
30 |
34 |
40 |
34 |
40 |
| Rated Duty Cycle |
60% @ 145A |
60% @ 160A |
60% @ 200A |
60% @ 160A |
40% @ 190A |
| No Load Voltage (V) |
67 |
67 |
67 |
85 |
85 |
| Output Current Range (A) |
10~145 |
10~160 |
10~200 |
110V:10~120
220V: 10~160 |
110V:10~120
220V: 10~190 |
| Efficiency (%) |
≥85 |
≥85 |
≥85 |
≥85 |
≥85 |
| Protection Class |
IP21S |
IP21S |
IP21S |
IP21S |
IP21S |
| Insulated Grade |
H |
H |
H |
H |
H |
| Electrode Size (mm) |
1.6~3.2 |
1.6~4.0 |
1.6~5.0 |
1.6~4.0 |
1.6~4.0 |
| Cooling Type |
AF |
AF |
AF |
AF |
AF |
| Overall Dimension (mm) |
312*120*183 |
378*120*183 |
420*148*216 |
378*120*183 |
420*148*216 |
| Net Weight (KG) |
4.6 |
4.8 |
7.3 |
4.8 |
5.2 |
| Item/Model |
MMA-140D |
MMA-160D |
MMA-160G |
MMA-200G |
| Rated Input Voltage (V) |
110±10% |
110±10% |
230±10% |
230±10% |
| Frequency (Hz) |
50/60 |
50/60 |
50/60 |
50/60 |
| Rated Input Capacity (KW) |
4.5 |
8.1 |
5 |
6 |
| Rated Input Current (A) |
38 |
5.5 |
21 |
28 |
| Rated Duty Cycle |
40% @ 120A |
40% @ 140A |
25% @ 120A |
25% @ 150A |
| No Load Voltage (V) |
85 |
85 |
61 |
61 |
| Output Current Range (A) |
10~120 |
10~140 |
10~120 |
10~150 |
| Efficiency (%) |
≥85 |
≥85 |
≥85 |
≥85 |
| Protection Class |
IP21S |
IP21S |
IP21S |
IP21S |
| Insulated Grade |
H |
H |
H |
H |
| Electrode Size (mm) |
1.6~3.2 |
1.6~4.0 |
1.6~3.2 |
1.6~4.0 |
| Cooling Type |
AF |
AF |
AF |
AF |
| Overall Dimension (mm) |
312*120*183 |
312*120*183 |
312*120*183 |
312*120*183 |
| Net Weight (KG) |
3.5 |
3.8 |
3 |
3.2 |
2.7 Standard
* EN 60974-1: Arc Welding Machine Standards
* JB / T 7824-95: Technical Conditions of Inverter Arc Welding Rectifier
* GB 4208-93: Protection Class (IP Code)
3.Interconnection Diagram
Circuit Schematic of INARC Welder
(Figures for reference are subject to change without notice.)
4.Transportation and Storage
* This machine is an indoor equipment and the attacks of rain and snow should be avoided in the process of transportation and storage. While loading and unloading, more attention should be paid on the package with words of warning. Storage warehouse should be kept dry with good air circulation and no corrosive gas or dust. The temperature should be maintained from -25ºC to 55ºC and relative humidity must be lower than 90%.
* If the products are still needed to continue storing after stripping, repacking should be carried out according to original package's requirement. Remember before storage, don't forget to clean and seal it with plastic bags.
* Users should maintain the cartons and shock blocks in order to be properly packaged in need of long distant transportation. For the long distant transportation, it should be retrofitted with a wooden case and mark the "up" or "rain" symbols.
5.Quality Warranty
If the machine is used in accordance with the regulations on the operation manual, in compliance with the rules on installation, storage, use, maintenance, safeguarding, manufacturers should provide free services for the users under the conditions of within 12 months from the date of purchase (based on the issued invoice date).
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