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DO NOT attempt to fit any unapproved torches, components, or parts to
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the inverter unit.
DO NOT hit the electrode on the workpiece, this may damage the
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electrode and make strike-up difficult.
WARNING! When TIG welding keep the gas bottle away from sources
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of heat including sunlight.
DO NOT get inverter wet or use in damp or wet locations or areas where
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there is condensation.
DANGER! DO NOT weld near flammable materials - solids, liquids, or gases.
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DO NOT weld containers or pipes which have held flammable materials -
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gases, liquids or solids. Avoid operating on materials cleaned with chlorinated
solvents or near such solvents.
2. DESCRIPTION & SPECIFICATION
2.1. INTRODUCTION: These Inverters are lightweight, powerful and versatile.
They are suitable for ARC or TIG welding using the "Scratch-Start" method.
They have Arc-Force circuitry making them suitable for welding with a wide
variety of rods including rutile, basic and stainless of various sizes (see charts).
These machines also have a thermal cut-out and mains voltage LEDs and are
fitted with a Hot-Start system to counter electrode sticking during scratch-
starting. Model MW160PLUS features a supply filter to minimise the risk of
damage when powered from a generator.
2.2. DESCRIPTION: These models are "constant current rectifiers" for ARC
welding and are controlled by a transistor bridge with a high frequency. The
specific characteristics of the "INVERTER" system provide high speed and
precise regulation, ensuring a high quality result for both stick electrode and TIG
welding (DC). The "INVERTER" system, regulated at the input of the primary
mains, also allows for a drastic reduction in the volumes of both the transformer
and the reactance. This reduction in volume and weight enhances the mobility
of the machines. The unit has a power module which has been developed on a
special printed circuit designed to maximise reliability and reduce maintenance.
2.3. CIRCUIT SYSTEM DESCRIPTION Refer to fig. 1
1.
Mains input (single phase), rectifier unit and condenser.
2.
Transistors and drivers switching bridge (IGBT). Turns the mains rectified
voltage into high frequency alternating voltage and permits power
regulation according to the current/voltage of the weld.
2.4.
SPECIFICATION
Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MW160PLUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MW170.V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . MW140PLUS
Output: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-150A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-160A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-130A
Duty Cycle: . . . . . . . . . . . . . . . . . . . . . . . . . . 35% @ 150A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35% @ 160A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25% @ 130A
Electrode Capacity:. . . . . . . . . . . . . . . . . . . . . Ø1.6-4.0mm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ø1.6-4.0mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ø1.6-3.2mm
Supply Filter: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . YES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . YES
Absorbed Power: . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2k W
Mains Voltage: . . . . . . . . . . . . . . . . . . . . . . . . . . 230V-1ph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230V-1ph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230V - 1ph
Insulation Class: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H
Protection: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP23
Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5kg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1kg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1kg
Accessories Included: . . . . . . . . . . . . . . . . . . . . . . . . . . No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No
ARC Accessory Ref: . . . . . . . . . . . . . . . . . . . . . . . . INV/16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INV/16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INV/16
TIG Accessory Ref: . . . . . . . . . . . . . . . . . . . . . . . . INV/TIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INV/TIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INV/TIG
3.
CABLE ASSEMBLY
3.1
Unpack the product and check contents. Should there be any damaged or missing parts contact your supplier immediately.
3.2
WELDING ACCESSORY KITS.
3.2.1 ARC WELDING: To perform conventional ARC welding you will require Sealey Kit INV/16
which contains a welding mask, electrode holder, earth clamp, cables and chipping hammer.
This kit is not supplied with the inverter.
3.2.2 TIG WELDING: To perform TIG welding you will require Sealey Kit INV/TIG which contains a
welding mask, TIG torch and cable with integral gas connection hose, gas regulator, earth
clamp, earth cable and dinse connector and chipping hammer. This kit is not supplied with
the inverter.
WARNING! Ensure that the inverter is not plugged into the power supply before
! !
assembling, connecting or disconnect cables. See Safety Instructions (Section 1).
3.3
WELDING CABLE ASSEMBLY.
With either accessory kit it may be necessary to assemble the clamps and connectors to the
cables as indicated in the adjacent diagrams.
3.3.1 EARTH CLAMP: Refer to fig.2.
3.3.2 ELECTRODE HOLDER: Refer to fig.3. (For ARC welding )
3.3.3 DINSE PLUG ASSEMBLY: Refer to fig.4.
WARNING! Cable connectors must be turned fully into the dinse sockets to ensure a
! !
good electrical contact. Loose connections will cause overheating, rapid deterioration
and loss in efficiency.
fig. 2
DO NOT perform welding on pressurised containers.
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DO NOT operate the inverter if it or the cables are damaged.
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DO NOT pull the inverter by the cables, or the torch.
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DO NOT bend, strain or stand on cables.
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DO NOT place cables where they will endanger others. Long lengths of
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slack must be gathered and neatly coiled.
DO NOT use welding cables over 10m in length.
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DO NOT touch workpiece near to the weld as it will be very hot. Allow to cool.
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DO NOT touch the torch immediately after use. Allow the torch to cool.
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DO NOT operate the inverter while under the influence of drugs, alcohol or
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intoxicating medication, or if tired.
When not in use, store the inverter in a safe, dry, childproof area.
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3.
High frequency transformer: The primary windings are fed by the voltage
converted by Block 2. It has the function of adapting voltage and current to
the values required by the ARC welding procedure and, simultaneously,
isolates the welding circuit form the mains.
4.
Secondary rectifier bridge with inductance. Changes the alternating current
supplied by the secondary windings into direct current.
5.
Electronic and regulation board: Instantly checks the value of the
welding current against that selected by the user. It modulates the
commands of the IGBT drivers, which control regulation. The control
board also determines the dynamic response of the current transient while
the electrode melts (instantaneous short circuit), and is responsible for the
safety system.
fig. 3
fig. 4
MW140PLUS.V2, MW160PLUS, MW170.V3 - 3 - 160505
fig. 1
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