AOTAI ARC315 User manual

1
Dear Customer
This instruction manual will help you get to know your new machine. Read the manual carefully and
you will soon be familiar with all the many great features of your new product. Meanwhile, please
remember well safety rules and operate as instruction.
If you treat your product carefully, this definitely helps to prolong its enduring quality and reliability
things which are both essential prerequisites for getting outstanding results.
Production specification may change without advance notice.
The model you purchase is for:
ARC315/400/500/630
ARC1000/1250
ARC400II
ARC400-3T
TIG315/400/500/630
TIG1000/1250
TIG400II
Please find corresponding models from the "Contents".
Important:
Please take special note of safety rules and operate as instruction in case of damage and serious
injury.

Safety Rules
“Danger” indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
“Warning!” indicates a possible hazardous situation which, if not avoided, could result in death or serious injury.
The possible hazards are explained in the text.
“Caution” indicates a possible hazardous situation which, if not avoided, may result in slight or moderate injury.
“Note!” indicates a situation which implies a risk of impaired welding result and damage to the equipment.
“Important!”indicates practical tips and other useful special-message. It is no signal word for a harmful or dangerous
situation.
Utilisation for intended purpose only.
Utilisation for any other purpose, or in any other manner, shall be deemed to be “not in accordance with the intended
purpose”. The manufacturer shall not be liable for any damage resulting from such improper use.
The machine may only be used for jobs as defined by the “Intended purpose”.
Safety signs.
removed, not be covered, pasted or painted cover.
All the safety instructions and danger warnings on the machine must be kept in legible condition, not
Safety inspection.
The manufacturer also recommends every 3-6 months for regular maintenance of power sources.
The owner/operator is obliged to perform safety inspection at regular intervals.
Electric shock can kill.
work circuit is electrically live whenever the output is on. The input power circuit and machine internal circuits are
also live when power is on. In MIG/MAG welding, the wire, drive rollers, wire feed housing and all metal parts
touching the welding wire are electrically live. Incorrectly installed or improperly grounded equipment is a hazard.
Do not touch live electrical parts of the welding circuit, electrodes and wires with your bare skin or wet clothing.
The operator must wear dry hole-free insulating welding gloves and body protection while performs the welding.
Insulate yourself from work and ground using dry insulating protection which is large enough to prevent you full area
of physical contact with the work or ground.
Connect the primary input cable according to rules. Disconnect input power or stop machine before installing or
maintenance.
If welding must be performed under electrically hazardous conditions as follow: in damp locations or wearing wet
clothing; on metal structures such as floors, gratings, or scaffolds; when in cramped positions such as sitting,
kneeling, or lying; or in occasion when there is a high risk of unavoidable or accidental contact with the work piece or
ground. Must use additional safety precautions: semiautomatic DC constant voltage (wire) welder, DC manual
(Stick) welder and AC welder with reduced open-load voltage.
Maintain the electrode holder, ground clamp, welding cable and welding machine in good, safe operating condition.
Replace damaged part immediately.
Touching live electrical parts can cause fatal shocks or severe burns. The electrode and
Electric and magnetic fields (EMF) may be dangerous.If electromagnetic interference is found to be occurring,
the operator is obliged to examine any possible electromagnetic problems that may occur on equipment as follow:
- Minas, signal and data-transmission leads
- IT and telecoms equipment
- Measurement and calibration devices
- Wearers of pacemakers
Measures for minimizing or preventing EMC problems:
- Mains supply
2

If electromagnetic interference still occurs, despite the fact that the mains connection in accordance with the
regulations, take additional measures
- Welding cables
Keep these as short as possible.
Connect the work cable to the work piece as close as possible to the area being welded.
Lay them well away from other cables.
Do not place your body between your electrode and work cables.
- Equipotential bonding
- Workpiece grounding (earthing)
- Shielding
Shield the entire welding equipment and other equipment nearby.
ARC rays can burn.
Wear an approved welding helmet or suitable clothing made from durable flame-resistant material (leather, heavy
cotton, or wool) to protect your eyes and skin from arc rays and sparks when welding or watching.
Use protective screens or barriers to protect other nearby personnel with suitable, non-flammable screening and/or
warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or material.
Visible and invisible rays can burn eyes and skin.
Fumes and gases can be dangerous.
can be hazardous to your health.
When welding, keep your head out of the fume. If inside, ventilate the area at the arc to keep fumes and gases
away from the breathing zone. If ventilation is not good, wear an approved air-supplied respirator.
Work in a confined space only if it is well ventilated, or while wearing an air-supplied respirator.
Welding fumes and gases can displace air and lower the oxygen level causing injury or death. Always use enough
ventilation, especially in confined areas, to insure breathing air is safe.
Welding may produce fumes and gases, breathing these fumes and gases
Welding and cutting sparks can cause fire or explosion.
touching the work or ground. Accidental contact can cause sparks, explosion, overheating, or fire. Make sure the
area is safe before doing any welding.
Welding and cutting on closed containers, such as tanks, drums, or containers, can cause them to blow up. Make
sure proper steps have been taken.
When pressure gas is used at the work site, special precautions are required to prevent hazardous situations.
Connect work cable to the work as close to the welding zone as practical to prevent welding current from passing
too long and creating fire hazards or overheat.
Wear oil-free protective garments such as leather gloves, heavy shirt, cuffless trousers, high shoes, and a cap.
Wear ear plugs when welding out of position or in confined places. Always wear safety glasses with side shields
when in a welding area.
Be attention that welding sparks and hot materials from welding can easily go through small cracks and openings to
adjacent areas and start a fire. Remove fire hazardous from the welding area, if not possible, cover them thoroughly.
Do not weld where flying sparks can strike flammable material and where the atmosphere may contain flammable
dust, gas, or liquid vapors (such as gasoline).
Protect yourself and others from flying sparks and hot metal. Remove any combustibles from operator before
perform any welding.
Keep a fire extinguisher readily available.
Empty containers, tanks, drums, or pipes which have combustibles before perform welding.
Remove stick electrode from electrode holder or cut off welding wire at contact tip when not in use.
Apply correct fuses or circuit breakers. Do not oversize or bypass them.
When not welding, make sure the electrode circuit is not
3

Cylinder can explode if damaged.
cylinder can explode. Since gas cylinders are normally part of the welding process, be sure to treat them carefully.
Cylinders should be located away from areas where they may be struck or subjected to physical damage. Use
proper equipment, procedures, and sufficient number of persons to lift and move cylinders.
Always install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling
over or tipping.
Keep a safe distance from arc welding or cutting operations and any other source of heat, sparks, or flame.
No touching cylinder by welding electrode, electrode holder or any other electrically “hot” parts. Do not drape
welding cables or welding torches over a gas cylinder.
Use only correct compressed gas cylinders, regulators, hoses, and fittings designed for the process used; maintain
them and associated parts in good condition.
Use only compressed gas cylinders containing the correct shielding gas for the properly operating regulators
designed for the gas and pressure used. All hoses, fittings, etc. should be suitable for the application and
maintained in good condition.
Open the cylinder valve slowly and keep your head and face away from the cylinder valve outlet.
Valve protection caps should be kept in place over valve expect when the cylinder is in use or connected for use.
Pressure gas cylinders contain gas under high pressure. If damaged, a
Hot parts can burn.
Ensure equipment is cooled down before perform any work.
If touching hot parts is needed, use proper tools and/or wear heavy, insulated welding gloves and clothing to prevent
burns.
Do not touch hot parts with bare hand or skin.
Flying metal or dirt can injure eyes.
flying metal. It can hurt your eyes.
Remember wear appropriate safety glasses with side shields when in welding zone, even under your welding
helmet.
When welding, chipping, wire brushing, and grinding can cause sparks and
Noise can damage hearing.
Remember wear approved ear protection to protect ears if noise level is high.
Noise from some processes or equipment can damage hearing.
Moving parts can injure.
Stay away from pinch points such as drive rolls.
Keep all doors, panels, covers, and guards closed and securely in place.
Have only qualified persons remove doors, panels, covers, or guards for servicing and maintenance.
Reinstall doors, panels, covers, or guards when servicing and maintenance is finished and before reconnecting input
power.
Stay away from moving parts such as fans.
Overuse can cause overheating.
starting to weld again.
Allow cooling period.
Do not block or filter airflow to unit.
Use machine follow duty cycle. Reduce current or reduce duty cycle before
Safety markings.
Electromagnetic Compatibility Guideline (e.g. relevant product standards according to EN 60 974).
Equipment with CCC markings meets the requirements of implementations rules for China compulsory certification.
Equipment with CE-markings fulfils the basic requirements of the Low-Voltage and
4

Contents
1-GENERAL REMARKS
1-1 Power source features
1-2 Functional principle
1-3 Output characteristics
1-4 Duty cycle
1-5 Applications
1-6 Warning label
2- VERSIONS BRIEFS
3-BEFORE COMMISSIONING
3-1 Utilization for intended purpose only
3-2 Machines installation rules
3-3 Power source connection
3-4 Welding cables instruction
4-ARC315/400/500/630
4-1 System components
4-2 Basic equipments for welding
4-3 Interface
4-4 Connections
4-5 Installation and operation
4-6 Technical data
4-7 Main components list
5-ARC1000/1250
5-1 System components
5-2 Basic equipments for welding
5-3 Interface
5-4 Connections
5-5 Installation and operation
5-6 Technical data
5-7 Main components list
6-ARC400II
6-1 System components
6-2 Basic equipments for welding
6-3 Interface
6-4 Connections
6-5 Installation and operation
6-6 Technical data
6-7 Main components list
7-ARC400-3T
7-1 System components
7-2 Basic equipments for welding
7-3 Interface
7-4 Connections
7-5 Installation and operation
7-6 Technical data
7-7 Main components list
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6
8
8
8
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11
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25
28
28
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44
46
47
34
37
23
32
34
38
41

8-TIG315/400/500/630
8-1 System components
8-2 Basic equipments for welding
8-3 Interface
8-4 Connections
8-5 Installation and operation
8-6 Technical data
8-7 Main components list
9-TIG1000/1250
9-1 System components
9-2 Basic equipments for welding
9-3 Interface
9-4 Connections
9-5 Installation and operation
9-5 Technical data
9-6 Main components list
10-TIG400II
10-1 System components
10-2 Basic equipments for welding
10-3 Interface
10-4 Connections
10-5 Installation and operation
10-6 Technical data
10-7 Main components list
11-REMOTE CONTROLLER
11-1 Wire remote controller (support hot-plug)
11-2 Wireless remote controller
12-TROUBLE SHOOTING
13-CARE AND MAINTENANCE
14-BASIC WELDING TECHNIQUE
14-1 TIG welding technique
14-2 SMAW (Stick) welding technique
14-3 CAC-A technique
2
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1-GENERAL REMARKS
1-1 Power source features
This series machines include ARC and TIG types, with different specifications of rated current: 315A, 400A, 500A, 630A,
1000A, 1250A etc., which are high-efficient and energy-saving DC Arc welding machine. Enjoy reasonable static
characteristic and sound dynamic characteristic and HF arc starting function (this HF arc starting function is for TIG series
only).
Features and benefits:
- Strong ability against power grid fluctuation and arc length change. Strong capacity of arc self-adjustment.
- Soft switch technology, high efficiency.
- High duty cycle, small size, light weight.
- Continuous adjustment of welding current with wide range.
- Less spatter, high deposition rate, less welding deformation, pretty weld formation.
- Suitable for long distance welding, up to 50 meters.
- Digital display for accurate parameter preset.
- Easy arc-start.
- Wire/ Wireless remote control.
- 2 step/ 4 step (TIG series only)
- Two arc starting methods (contact arc starting and HF arc starting) to choose; with current down-slope function when
stopping arc, and the down slope time is continuous adjustable. (TIG series only)
Fig. 1-2-1: Schematic diagram
1-3 Output characteristics
Please refer to Fig. 1-3-1 for output characteristics.
Fig. 1-3-1: Output characteristics
3
1-2 Functional principle
This series welding machines apply IGBT soft switch inverter technology. 3- phase input volt are rectified by rectifier,
inverted into HF AC, reduced by HF transformer, rectified and filtered by HF rectifier, then output DC power suitable for
welding. After this process, the welding machine dynamical responsive speed has been greatly increased, so the size and
weight are reduced noticeably result in energy saving. Power source enjoy sound anti-fluctuation ability and high quality
performance during external context changes (such as fluctuation in input power supply and extended welding cables). The
schematic diagram (ARC series welding machines do not have HF Arc-starting device) is as shown in Fig. 1-2-1:
0
I(A)
U(V)
90
10
U=10+0.04I
Imin Imax
0
U=20+0.04I
I(A)
U(V)
90
20
Imin Imax
Input Output
HF transformerHf inverte r Rectifier an d filt er
3 pha se rect ifier
Control ci rcuit
Hf arc st arting
(only fo r TIG se ries)
TIG mode SMAW mode

Note! Exceeding duty cycle can damage unit and void warranty.
Fig. 1-4-1: Duty cycle
1-5 Applications
It is not only used in carbon steel and low alloy steel welding, but also used in stainless steel, high alloy steel, copper, silver,
molybdenum and titanium welding.
The power source is designed for the following recommend areas:
- Shipbuilding and offshore engineering
- Pipeline industry
- Shipyard
- Boiler and container manufacture
- Aerospace industry
- Chemical structure and engineering
- Electric power construction
- Automobile, vehicle manufacture
- Mechanical industry
- Maintenance and repair
1-6 Warning label
The warning label is affixed onto the top of the power source, and it must not be removed or painted over.
4
0
15
Overheating Minute OR
Reduce Duty Cycle
1-4 Duty cycle
Duty cycle is percentage of 10 minutes that a machine can weld at rated load without overheating. If overheats,
thermostat(s) will open, output stops, and cooling fan runs. Wait for fifteen minutes for the machine to cool down. Reduce
amperage or duty cycle before welding.
Fig. 1-6-1: Warning label
10 20 30 40 50 60 70 80 90 100
0
%DUTY C Y CLE
WELD AMPERES
100
315
1000
400
500
630
1250
ARC/TIG400/400B/400II
ARC/TIG500
ARC/TIG630
ARC/TIG1000
ARC/TIG1250
244
310
387
ARC/TIG315

2-VERSIONS BRIEFS
Professional welding of special materials requires special welding parameters. Different models of the power sources are
matched to different welding.
ARC315/400/500/630
The power sources have logical arranged control panel for convenient operation, which can perform SMAW and Gouging (≥
500A). Welding cable can be extended to 50m.
ARC1000/1250
The power sources have logical arranged control panel for convenient operation, which can perform SMAW and Gouging,
suit for thick plate welding and gouging. Welding cable can be extended to 50m.
ARC400II
This type machine can perform downhill welding function for cellulose electrode, especially suitable for pipeline industry, and
suitable to work with generator for field usages.
ARC400-3T
This is multi-operator welding machine, which integrates 3 units ARC400 machines into one case. Three outputs allow three
operators to work at the same time or work separately.
TIG315/400/500/630
The power sources have logical arranged control panel for convenient operation, which can perform SMAW, simple TIG, DC
TIG and Gouging (≥500A). Welding cable can be extended to 50m.
TIG1000/1250
The power sources have logical arranged control panel for convenient operation, which can perform SMAW, simple TIG, DC
TIG and Gouging, suit for thick plate welding and gouging. Welding cable can be extended to 50m.
TIG400II
This type machine can perform downhill welding function for cellulose electrode, especially suitable for pipeline industry, and
suitable to work with generator for field usages.
5

3-BEFORE COMMISSIONING
3-1 Utilization for intended purpose only
The power source may only be used for SMAW (ARC and TIG series) and TIG (only TIG series) welding. Utilisation for any
other purpose, or in any other manner, shall be deemed to be “not in accordance with the intended purpose”. The
manufacturer shall not be liable for any damage resulting from such improper use.
Utilisation in accordance with the “intended purpose” also comprises:
-following all the instructions given in this manual
-performing all stipulated inspection and servicing work
Warning! Operating the equipment incorrectly can cause serious injury and damage. Do not use the functions
described here until you have read and completely understood the “Safety rules”.
Warning! A machine that topples over or falls can easily cause harm to people. Please firmly install the machine on
a stable place.
The venting duct is very important for safety protections. When choosing the machine location, make sure it is possible for
the cooling air to freely enter and exit through the louvers on the front and back of machine. Any electro conductive metallic
dust like drillings must not be allowed to get sucked into the machine.
Note! Inadequately dimensioned electrical installations can lead to serious damage. The mains lead, and its fuse
protection, must be dimensioned in accordance with the local power supply. The technical data shown on the rating
plate shall apply.
3-2 Machines installation rules
According to test, the protection degree of this power source is IP21S/IP23S. However, the internal key components must
be protected from direct soaking.
3-3 Power source connection
- The power source is designed to run on the voltage given on the nameplate.
- The mains cables and plugs must be mounted in accordance with the relevant technical standards.
- The power supply sockets that come with power source are designed to use strictly according to the marked voltages.
6
3-4 Welding cables instruction
When welding, please pay attention to the followings.
a. The welding cables should be kept as short as possible;
b. If extended cable is used, please do as shown in Fig. 3-4-1.
Wrong
Coil the excess ground cable and welding
cable in same direction respectively
Torch
Correct
Straighten the ground cable and welding
cable and make them close to each other.
Bundle the ground cable and welding cable
together, running the wires close to the
ground

AB
AB
Correct
When the excess cables are only be used by
rolling up, coil the cables to two windings in
reverse direction and overlap them.
The number of turns for A is same as the
number for B.
Handle the welding cable and ground cable
according to above-mentioned method.
Fig. 3-4-1: Welding cables instruction
7

4-ARC315/400/500/630
4-1 System components
This series of machines can be equipped with many different accessories. Please refer to Fig. 4-1-1.
Fig. 4-1-1: System components
4-2 Basic equipments for welding
Basic equipments are needed for normal welding. Below are the lists:
SMAW welding
- Power source
- Ground cable
- Electrode holder
- Electrode
GOUGING
- Power source
- Ground cable
- Gouging torch
- Carbon rod
- Air compressor
Ground c a ble
Welding c a ble
Gouging t o rch(Optional)
Wireless remote contro l l er (Op t ional)
1
5 6
8
10
7
2
4
9
3
110
56
8
2
3
47
9
A
ARC FOR CE/DEC AY TIM E
WEL D I N G CURRE N T
Wire rem o te con t roller (O ptional)
PROTECTION
PANEL
REMOTE
A
V
InverterDCArcWeldingMachine
ARC400
DEFAULTPHASE
Power s o urce
ARC FORCEWELDI NG CURRENT
WIRELESS REMOTE CONTROLLER
8

9
Notes! You may find that your machine has certain functions or some parameters that are not described in this
operating manual. Also, certain illustrations may be very slightly different from the actual controls on your machine.
Howerever, these controls function in exactly the same way.
Fig. 4-3-1: Front panel
1.“Amp/Volt” displayer
- When display mode switch indicates to “Amp”:
LCD displays preset current value, Min. current is 20A;
LCD displays real welding current during working.
2.Protection indicator
Welding machine will automatically stop working when it is overheat, and the indicator will light up.
3.Default phase indicator
Indicator indicates when power source is default phase.
4.“Remote control/ Panel control” switch
When it is on “Panel control”, you can adjust welding current, arc force current by the knobs on the machine control panel;
When it is on “Remote control’, you can adjust the above parameters through remote controller in an extended distance from
the welding areas.
5.“Amp/Volt” displayer mode selection switch
6.“Welding current” regulation knob
It is used to adjust welding current on panel control mode.
Preset proper welding current according to work piece thickness, groove shapes, welding position, wire diameter, etc.
Welding current decides welding seam depth and wire molten rates.
7.Remote control socket
It is used to connect to the wire remote controller with remote control cable, then user can adjust welding current, arc force
current on “Remote control” mode. It is convenient to realize welding control in extended distance.
8.Start current regulation knob
It is used to adjust arc starting current under SMAW mode.
Before start arc, work piece is on cold state, increase arc start current so as to improve heat input, which makes the arc start
easier.
- When display mode switch indicates to “Volt”, LCD displays voltage between output terminals of welding machine.
Front panel
4-3 Interface
2
1
3
47
8
9
10
2
1
3
4567
8
9
10
6
5
Inverter DC ARC Welding Machin e
AR C 4 00
PRO TECTIO NDEF AUL T P H A SE
PANEL
REM OTE
A
V
ST ART CU R RENT ARC FO RCE WEL DING CU RREN T
1 3
4
2
5
6
8
9
7
1110

9.“Arc force current” regulation knob
It is used to adjust arc force current on panel control mode.
When welding, short circuit between wire and work piece may occur because of operation or droplet transfer. In order to
avoid short circuit or wire stick, when arc voltage is low, increase current to shorten the droplet transfer time.
10.Positive output terminal (+)
Connect with electrode holder via welding cable in SMAW.
In Gouging, it is connected to the gouging torch.
11.Negative output terminal (-)
Connect with work piece via ground cable.
Rear panel
Fig. 4-3-2: Rear panel
1. Circuit breaker
The function of circuit breaker is to protect welding machine and operator by automatic trip to turn-off power supply when
overload or short circuit happens to the power source. Normally, the switch flipped to upward means power-on. To start or
stop the welding machine is done by the mains switch in the distribution box. Please do not take this circuit breaker as the
power switch.
2. Input power cable
It is 4-pin cable. The mixed-colored wire must be firmly grounded, the rest wires connect to corresponding 3-phase power
supply.
3. Nameplate
4. Cooling fan
Cool down the heat components in the welding machine.
5. Earthing bolt
To ensure operators not being harmed and welding machine working normally, make sure the earthing bolt is grounded
firmly by protective GND wire, or make sure the protective GND wire (mixed-colored) of the power supply cable is grounded
firmly.
10
3 / N / P E ～3 8 0 V 5 0 zH
3 ～
f
2
f
1
S
MO D E L No.
M AD E NI
X
U
2
I
2
60 %
40 0 A
36V
10 0%
31 0A
32.4V
U
0
=70V
U
r
=20V
20 A /2 0. 8 V ～ 40 0 A / 3 6 V
ST AN D AR D :
EN 60974-10
EN 60974-1
3～50 Hz
U
1
=40 0V I
1max
=26. 6 A I
1eff
=20 .9 A
INSULATION DEGREE:
PROTECTION EDGREE:
H/B
I P2 3 S
ARC500
1
2
3
4
5

11
4-4 Connections
Table 4-4-1: Connections
Output socket
The output socket of this power source has two types: one is fast plug-in type, another one is compression type. Make sure
the plug match your power source socket.
Fig. 4-4-1: Output socket
Compression type
Fast plug-intype
2
1
3
47
8
9
10
2
1
3
4567
8
9
10
6
5
Inverter DCArc We lding Ma chine
AR C4 00
PR OTECTI ONDEF AULT P H ASE
PANE L
REM OTE
A
V
START C U R RENT ARC F O RCE WEL DING C U RR ENT
1
5 6
8
10
7
2
4
9
3
110
56
8
2
3
47
9
A
ARC FORCE/D ECAY TI M E
WEL DING CU R RENT
12
34
6
5
7
Remote control socket
Socket pin Description
1-2
3
4
5
6
7
Null
-9V power supply
Remote welding current given signal
Power GND
Remote arc force current given signal
Remote controller digital signal

12
Input power supply cable installation
Please note the size of fuse and circuit breaker in the table below are for reference only.
Single voltage
Warning! Electric shock is very dangerous. If the machine is plugged into the mains electricity supply during
installation, there is a high risk of very serious injury and damage. Only carry out work on the machine when
- the mains switch is in the “OFF” position,
- the machine is unplugged from the mains.
Fig. 4-5-1: Installation
Model
Power supply
315
Min. power (KVA)
Input protection (A)
Cable size (mm²)
21
45
60
80
6
35
6
Table 4-5-1: Input power supply cable installation- single voltage AC220V
3 phase, AC220V±10%, 60Hz
Power network
Generator
Fuse
Circuit breaker
Input cable
Output cable
Protective GND wire
38
60
100
120
10
50
10
400 500
28
45
80
100
6
50
6
V
A
WELDING CURRENT
PANEL
A/ V
REMOTE
PROTE CTION
Inverter DC ARC W elding Mach ine
ARC400
POWER
ARC FORCE
START CURRE NT
5 6 7
8
10
4
3
2
1 1
2
3
4
10
9
8
7
65
9
1
5 6
8
10
7
2
4
9
3
110
56
8
2
3
47
9
A
ARC FORCE/D ECA Y ITME
WELDING CURRENT
4-5 Installation and operation

13
Model
Power supply
315
Min. power (KVA)
Input protection (A)
Cable size (mm²)
21
45
40
63
4
35
4
Table 4-5-2: Input power supply cable installation- single voltage AC380V/400V/415V/440V
3 phase, AC380V/400V/415V/440V ±10%, 50/60Hz
Power network
Generator
Fuse
Circuit breaker
Input cable
Output cable
Protective GND wire
28
45
50
63
4
50
4
51
80
63
100
6
70
6
38
60
63
100
6
50
6
Multi voltage
Model
Power supply
350 400 500
Min. power (KVA)
Input protection (A)
Cable size (mm²)
21
63
100
6
35
6
Table 4-5-3: Input power supply cable installation- multi voltage
3 phase, AC220V/380V/440V±10%, 60Hz
Power network
Fuse
Circuit breaker
Input cable
Output cable
Protective GND wire
38
63
100
6
50
6
28
63
100
6
50
6
400 500 630
Note! Welding machine must be taken special design if it is powered by generator, please contact with
manufacturer if you have such needs.
The connection between input power supply cable and switch box (Fig. 4-5-2).
Warning!
- Never connection when equipment is power on!
- The connection must be carried out by a qualified electrician!
- Do not connect two units of power sources to the same one circuit breaker!
- Connected to the correct input voltage, circuit breaker, input cable as per the specification on Table 4-5-1
~ Table 4-5-3.

14
Fig. 4-5-2: Connection between input power supply cable and switch box
Operating guide
Warning! Operating the welding machine incorrectly can cause serious injury and damage. Do not use the
functions described here until you have read and completely understood all the following guides:
-“safety rules”
-“before commissioning”
Warning! Electric shock is very dangerous. As soon as the power source is switch on, the welding
electrode is power on. Make sure that the electrode does not touch any person or conductor or grounded
parts (e.g. lifting appliance etc.)
SMAW welding with basic electrode: E7016/E7018
1.Connect electrode holder with output terminal (+), connect work piece with output terminal (-);
2.Place switch on “ON” position, power on;
3.Choose “Panel control” mode on control panel;
4.Choose “Amp/Volt” switch on “Amp” position;
5.Adjust arc start current, arc force current, welding current according to electrode diameter, welding position;
6.Welding
Gouging
Note! “GOUGING” process only is available for the machine which rated current is ≥500A.
1.Switch off the mains switch;
2.Plug one end of the ground cable to the output terminal (-);
3.Connect the other end of the ground cable to the work piece;
4.Plug the gouging torch cable to output terminal (+);
5.Connect the gas hose to gas outlet of the air compressor or other gas supply tube;
6.Switch on the mains switch;
7.Select “SMAW” by the SMAW/TIG switch on front panel;
8.Set the required current value by rotating “welding current” knob;
9.Increase arc force current properly;
10.Open the gas valve of the compressed air, and regulate the needed shielding gas flow and pressure;
11.Choose proper carbon rod according to current;
12.Open gas valve on gouging torch, make gas flow towards to work piece;
13.Start Gouging.
L1
L2
L3
GND
L1 L2 L3
Yellow-Green protective GND wire is used for grounding! Not zero wire! Please connect according to picture or
other correct way. Please disconnect mains power when connecting!
If main case is grounded, this cable needs no grounding.
L1
L2
L3
GND
L1 L2 L3
315A/400A welding machine
500A/630A welding machine

15
4-6 Technical data
Note! Please use the machine under the allowed power supply voltage range marked in the nameplate. The
technical data with the basic input voltage are listed as the Table 4-6-1~Table 4-6-2.
Single voltage
Primary power voltage /Frequency
Rated output capacity (KW)
Rated input current (A)
Rated duty cycle (%)
Range of output current (A)
Model
Welding electrode diameter (mm²)
Weight (Kg)
Dimension (mm³)
Insulation class
3 phase, AC220V/380V/400V/415V/440V±10%, 50/60Hz (Model 630 does not have 220V type)
Table 4-6-1: ARC315/400/500/630 technical data-single voltage
315 400 500 630
10.3
35/21/20/19/18
14.4
45/27/26/25/24
20
60/36/35/34/33
27.7
53/52/51/50
60 100
Arc-force current (A)
Arc-starting current (A)
MMA
20~315
15~160
0~75
20~400
15~200
0~75
20~500
15~250
0~75
50~630
15~330
0~75
Max. open circuit voltage (V)
Protection class
Full-load efficiency (%)
Power factor
80±8
IP21S
89
0.95
2~5
34
2~6
43
2~6
50
2~6
58
576×297×557 636×322×582 686×322×584
Main transformer/output reactor H
Multi voltage
Primary power voltage /Frequency
Rated output capacity (KW)
Rated input current (A)
Model
Protection class
Full-load efficiency (%)
Power factor (full-load）
Welding electrode diameter (mm²)
3 phase, AC220V/440V , 60Hz±10%
315 400 500 630
10.3
21
14.4
38
20
38
27.7
52
Arc-force current (A)
Arc-starting current (A)
MMA
60%
220V input,
320A/32.8V 60%;
440V input,
400A/36V 60%
50~630
15~330
0~75
Max. open circuit voltage (V)
Range of output current (A)
IP21S
89
0.95
2~5
Rated duty cycle
220V input,
320A/32.8V 60%;
440V input,
500A/40V 60%
220V input,
400A/36V 100%;
440V input,
630A/44V 100%
11±3
5~315
15~160
0~75
5~400
15~200
0~75
10~500
15~250
0~75
2~6

Weight (Kg)
Dimension (mm³)
Insulation class
Model
315 400 500 630
50
576×297×557
Main transformer/output reactor
58
686×322×584
H
Table 4-6-2: ARC315/400/500/630 technical data- multi voltage
4-7 Main components list
2
1
4
5
6
3
10
11
89 7
1415
16
13
17
18
12
20
21
22
24 25 23
27
28
29
30
19 26
Fig. 4-7-1: Inner structure
No. Item Stock No.
262005-00231 380V/50HZ
262005-00795 220/380/440V/60HZ
740002-00048,
740002-00026 220/380/440V/60HZ
262011-00120 380V/50HZ
262011-00490 220/380/440V/60HZ
745011-00021 380V/50HZ
745011-00022 220/380/440V/60HZ
773002-00003 380V/50HZ
773002-00011 220/380/440V/60HZ
746001-00011 380V/50HZ
746001-00018 220/380/440V/60HZ
263065-00100 380V/50HZ
263065-00311 220/380/440V/60HZ
722001-00070 380V/50HZ
763004-00104 380V/50HZ,
763004-00103 220/380/440V/60HZ
740016-00017 380V/50HZ
720041-00008 380V/50HZ
740002-00046 380V/50HZ
, 220/380/440V/60HZ
, 220/380/440V/60HZ
263071-00115 380V/50HZ
263071-00330 220/380/440V/60HZ
1
2
3
4
5
6
7
8Polypropylene capacitor
10
11
Middle board
12
Front plate
Output quick socket
Rear plate
Circuit breaker
Junction box
Fan
Bottom plate
16
Al-copper terminal blocks
Shunt
Output reactor
9
ARC315/400/500/630