- 7 -
WELDING MACHINE WITH THREE-POSITION SWITCH:
•
-
MMA electrode welding
The choice between the two positions in MMA is made
according to the type of electrode used.
A special device, the Arc Control System, guarantees improved
welding dynamics, easy starting (HO START) and fluid welding
(ARC FORCE) with each type of electrode:
Rutile, stainless steel and other types of
electrode.
Basic, aluminium, cellulose (mod. CE), and other
types of electrode.
•
TIG welding with scratch strike:
ANTI STICK device specific for TIG.
(HOT START and ARC FORCE not enabled).
on the back:
Fig. D
1- Power supply cable, 2p +
(1~), with EEC plug where
required; the power supply cable for the three-phase model is 3p
+
(3~).
(The cable of the “DUAL VOLTAGE AUTOMATIC” model does
not have a plug).
2- Main Switch O/OFF - I/ON (lit where required).
5. INSTALLATION
WARNING! CARRY OUT ALL INSTALLATION
OPERATIONS AND ELECTRICAL CONNECTIONS WITH THE
WELDING MACHINE COMPLETELY SWITCHED OFF AND
DISCONNECTED FROM THE POWER SUPPLY OUTLET.
THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND
EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL.
PREPARATION
Unpack the welding machine, assemble the separate parts contained
in the package.
Assembling the return cable-clamp
Fig. E
Assembling the welding cable-electrode holder clamp
Fig. F
HOW TO LIFT THE WELDING MACHINE
All the welding machines described in this handbook should be lifted
using the handle or strap supplied if provided for the particular model.
POSITION OF THE WELDING MACHINE
Choose the place to install the welding machine so that the cooling
air inlets and outlets are not obstructed (forced circulation by fan,
if present); at the same time make sure that conductive dusts,
corrosive vapours, humidity etc. will not be sucked into the machine.
Leave at least 250mm free space around the welding machine.
WARNING! Position the welding machine on a flat
surface with sufficient carrying capacity for its weight, to
prevent it from tipping or moving hazardously.
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, make sure the rating
data of the welding machine correspond to the mains voltage and
frequency available at the place of installation.
- The welding machine should only be connected to a power supply
system with the neutral conductor connected to earth.
- To ensure protection against indirect contact use residual current
devices of the following types:
- Type A (
) for single phase machines;
- Type B (
) for 3-phase machines.
- In order to satisfy the requirements of the EN 61000-3-11 (Flicker)
standard we recommend connecting the welding machine to the
interface points of the main power supply that have an impedance
of less than:
For model 1~
Zmax = 0.221 Ohm (160A, 180A).
Zmax = 0.170 Ohm (200A).
- the welding machine does not fall within the requisites of IEC/EN
61000-3-12 standard.
Should it be connected to a public mains system, it is the
installer’s responsibility to verify that the welding machine itself is
suitable for connecting to it (if necessary, consult the distribution
network company).
For model 3~
Zmax = 0.283 Ohm.
- the welding machine does not fall within the requisites of IEC/EN
61000-3-12 standard.
Should it be connected to a public mains system, it is the
installer’s responsibility to verify that the welding machine itself is
suitable for connecting to it (if necessary, consult the distribution
network company).
- Unless otherwise specified (MPGE), the welding machines are
compatible with power generating sets for voltage oscillations up
to ± 15%.
For correct use, the power generating set must be brought to
steady conditions before being able to connect the inverter.
- PLUG AND OUTLET:
- The 230V model
is fitted at the factory with a power supply cable
and normalised plug, (2P +
) 16A/250V.
It can therefore be connected to a mains outlet fitted with fuses
or an automatic circuit-breaker; the special earth terminal should
be connected to the earth conductor (yellow-green) of the power
supply line.
Table
(TAB.1)
shows the recommended delayed fuse sizes in
amps, chosen according to the max. nominal current supplied by
the welding machine, and the nominal voltage of the main power
supply.
- For welding machines without a plug (115/230V models)
/ (230V models)
, connect a normalised plug (2P +
(1~))
- having sufficient capacity- to the power cable and prepare a
mains outlet fitted with fuses or an automatic circuit-breaker;
the special earth terminal should be connected to the earth
conductor (yellow-green) of the power supply line. Table
(TAB.1)
shows the recommended delayed fuse sizes in amps, chosen
according to the max. nominal current supplied by the welding
machine, and the nominal voltage of the main power supply.
- For welding machines without a plug (400V models)
, connect
a normalised plug (3P +
(3~)) - having sufficient capacity- to
the power cable and prepare a mains outlet fitted with fuses or
an automatic circuit-breaker; the special earth terminal should
be connected to the earth conductor (yellow-green) of the power
supply line. Table
(TAB.1)
shows the recommended delayed fuse
sizes in amps, chosen according to the max. nominal current
supplied by the welding machine, and the nominal voltage of the
main power supply.
WARNING! Failure to observe the above rules will
make the (Class 1) safety system installed by the manufacturer
ineffective with consequent serious risks to persons (e.g.
electric shock) and objects (e.g. fire).
CONNECTION OF THE WELDING CABLES
WARNING! BEFORE MAKING THE FOLLOWING
CONNECTIONS MAKE SURE THE WELDING MACHINE IS
SWITCHED OFF AND DISCONNECTED FROM THE POWER
SUPPLY OUTLET.
Table
(TAB.1)
gives the recommended values for the welding cables
(in mm
2
) depending on the maximum current supplied by the welding
machine.
MMA WELDING
Almost all coated electrodes are connected to the positive pole (+)
of the power source; as an exception to the negative pole (-) for acid
coated electrodes.
WELDING OPERATIONS WITH DIRECT CURRENT
Connecting the electrode-holder clamp welding cable
