3.1.
On/Off switch
The On/Off switched is located at the rear of the inverter (fig. 1.1). When the switch is in the O position the inverter is turned off.
When switched to the I position the inverter is turned on, and the front panel LED (fig. 2.1) will show green or orange depending
upon whether the power supply is 230 or 110 volt, respectively.
3.2.
Welding current regulator
The cutting current is regulated by a rotary knob (fig. 2.2). Note that there are two scales, use the one which corresponds with the
supply voltage (110V or 230V). The current required depends upon the type of joint and the electrode diameter (fig. 3).
3.3.
Thermal protection & mains voltage fault LED
The thermal and mains fault yellow LED (fig. 2.3) illuminates to indicate one of the following faults:
a) The inverter has overheated.
b) There has been a decrease or increase in the supply voltage to the inverter.
In either case the control system will automatically deactivate the inverter.
These faults are self-rectifying, and within a few seconds the system will re-set and the LED will go out. The inverter is then ready to
be used again.
3. CONTROLS & DATA
fig. 1
fig. 2
Electrode
Welding
Diameter Current (A)
(mm)
Min. Max.
1.6
25
50
2.0
40
80
2.5
60
110
3.2
80
160
fig. 3
p
p
WARNING:
Use a welding mask to protect your eyes and face and avoid exposing any skin to the ultraviolet rays given off by the electric arc.
Always wear protective clothing, insulating gloves and shoes.
Keep all protective items clean and undamaged.
3
Keep unauthorised persons away from the work area. Any persons working within the area must wear the same protective items.
3
Remove ill-fitting clothing before wearing protective clothing. Remove ties, watches, rings and other loose jewellery and contain long hair.
3
Stand correctly keeping a good footing and balance and ensure that the floor is not slippery. Wear non-slip shoes.
3
Ensure the workpiece is correctly secured before welding.
3
Avoid unintentional contact with the workpiece. Accidental or uncontrolled striking of the arc may be dangerous.
7
DO NOT use cables and electrode holder if the insulation is worn or connections are loose.
7
DO NOT attempt to fit any unauthorised electrode holders or other components to the inverter.
7
DO NOT weld surfaces that are painted, galvanic coated, oily or greasy.
7
DO NOT use any metallic structure which is not part of the workpiece, other than the supporting work bench, as a substitute for the return
cable of the welding current.
s
s
DANGER!
DO NOT weld near inflammable materials, solids, liquids, or gases. Remove all flammable materials such as waste rags etc.
7
DO NOT weld containers or pipes which have held flammable materials or gases, liquids or solids. DO NOT weld materials that have been
cleaned with chlorinated solvents (or near such solvents) as vapours from the arc action may be toxic.
7
DO NOT operate inverter while under the influence of drugs, alcohol or intoxicating medication, or if tired.
7
DO NOT use the inverter for a task it is not designed to perform.
7
DO NOT operate the inverter if any parts are damaged or missing as this may cause failure and/or personal injury.
7
DO NOT carry, or pull inverter by cables. DO NOT strain or bend cables. DO NOT stand on cables. Protect cables from sharp or abrasive
items and from heat. Long lengths of slack must be gathered and neatly coiled. DO NOT place cables where they endanger others.
7
DO NOT hold the workpiece in your hand.
7
DO NOT get the inverter wet or use in damp or wet locations, or areas where there is condensation.
7
DO NOT touch the workpiece close to the weld as it will be very hot. Allow to cool.
7
DO NOT touch the electrode immediately after use. Allow to cool.
3
When not in use store the unit in a safe, dry, childproof area.
Rated voltage - 230V supply . . . . . . . .20.2-25.2V
- 110V supply . . . . . . . .20.2-24.0V
Duty cycle . . . . . . . . . . . . . .40/25% @ 100/130A
GENERAL
Case protection . . . . . . . . . . . . . . . . . . . . . .IP23
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.7kg
Electrode capacity . . . . . . . . . . . . .Ø1.6 - 3.2mm
INPUT
Supply voltage . . . . . . . . . . . . . . .230/110V - 1ph
Max. effective current- 230V . . . . . . . . . . . . 12A
- 110V . . . . . . . . . . . . .22A
Delayed fuse - 230V . . . . . . . . . . . . . . . . . T16A
- 110V . . . . . . . . . . . . . . . . . .T25A
2. INTRODUCTION & SPECIFICATION
The MW145.V2 is a dual voltage inverter, for manual arc welding, which automatically senses the supply voltage (230 or 110V) and
adjusts accordingly, making it ideal for site applications. Suitable for ARC or TIG welding applications using scratch start method. Arc force
circuitry makes the unit suitable for arc welding a wide variety of rods including rutile, basic and stainless from 1.6mm up tp 3.2mm diameter.
Fitted with Hot - Start system to counter electrode sticking during scratch start. Supplied without accessories - see parts list or contact your
Sealey dealer for details of available kits.
OUTPUT
No load voltage . . . . . . . . . . . . . . . . . . . . . . .85V
Current range - 230V supply . . . . . . . . .5 - 130A
- 110V supply . . . . . . . . .5 - 100A
Power output - 230V supply . . . . . . . . . . .3.3kW
- 110V supply . . . . . . . . . . . .2.4kW
MW145.V2 - 1 - 120505
3
1
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