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Telwin MODERNA 3.160 Manual

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Assembling the return cable-clamp
below the currents corresponding to various electrode diameters:
Fig. E
ø Electrode (mm) Welding current (A)
min. max.
1.6 25 - 50
Assembling the welding cable-electrode holder clamp
2 40 - 80
Fig. F
2.5 60 - 110
3.2 80 - 160
WARNING! Position the welding machine on a flat surface
4 120 - 200
- The user must consider that, according to the electrode diameter,
with sufficient carrying capacity for its weight, to prevent it from
higher current values must be used for flat welding, whereas for
tipping or moving hazardously.
vertical or overhead welds lower current values are necessary.
- In addition to being determined by the selected current intensity, the
CONNECTION TO THE MAIN POWER SUPPLY
mechanical characteristics of the welded join are determined by the
- Before making any electrical connection, make sure the rating data
other welding parameters i.e. arc length, working rate and position,
of the welding machine correspond to the mains voltage and
electrode diameter and quality (to store the electrodes correctly
frequency available at the place of installation.
keep them dry and protected by suitable packaging or containers).
- The welding machine should only be connected to a power supply
system with the neutral conductor connected to earth.
Welding procedure
- To comply with the requirements of the EN 61000-3-11 (Flicker)
- Holding the mask IN FRONT OF THE FACE, strike the electrode tip
standard we recommend connecting the welding machine to
on the workpiece as if you were striking a match. This is the correct
interface points of the power supply that have an impedance of less
strike-up method.
than Zmax =0,2 ohm.
WARNING: do not hit the electrode on the workpiece, this could
damage the electrode and make strike-up difficult.
PLUG AND OUTLET. (For welding machines without a plug) :
- As soon as arc is ignited, try to maintain a distance from the
connect a normalised plug (2P + T, 3P + T) having sufficient capacity-
workpiece equal to the diameter of the electrode in use. Keep this
to the power cable and prepare a mains outlet fitted with fuses or an
distance as much constant as possible for the duration of the weld.
automatic circuit-breaker; the special earth terminal should be
Remember that the angle of the electrode as it advances should be
connected to the earth conductor (yellow-green) of the power supply
of 20-30 grades (Fig.H).
line. Table 1 (TAB.1) shows the recommended delayed fuse sizes in
- At the end of the weld bead, bring the end of the electrode backward,
amps, chosen according to the max. nominal current supplied by the
in order to fill the weld crater, quickly lift the electrode from the weld
welding machine, and the nominal voltage of the main power supply.
pool to extinguish the arc.
For welders with double voltage supply, it is necessary to set the
CHARACTERISTICS OF THE WELD BEAD
blocking screw of the voltage-reverse switch in the position corre
Fig. I
sponding to the voltage really available (see example below).
Fig. G
7. MAINTENANCE
WARNING!
WARNING! BEFORE CARRYING OUT MAINTENANCE
Failure to observe the above rules will make the (Class 1) safety
OPERATIONS MAKE SURE THE WELDING MACHINE IS
system installed by the manufacturer ineffective with
SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER
consequent serious risks to persons (e.g. electric shock) and
SUPPLY.
objects (e.g. fire).
EXTRAORDINARY MAINTENANCE:
CONNECTION OF THE WELDING CABLES
EXTRAORDINARY MAINTENANCE OPERATIONS SHOULD BE
WARNING! BEFORE MAKING THE FOLLOWING
CARRIED OUT ONLY AND EXCLUSIVELY BY SKILLED OR
AUTHORISED ELECTRICAL-MECHANICAL TECHNICIANS.
CONNECTIONS MAKE SURE THE WELDING MACHINE IS
SWITCHED OFF AND DISCONNECTED FROM THE POWER
WARNING! BEFORE REMOVING THE WELDING MACHINE
SUPPLY OUTLET.
PANELS AND WORKING INSIDE THE MACHINE MAKE SURE THE
Table 1 (TAB. 1) gives the recommended values for the welding cables
2
WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED
(in mm ) depending on the maximum current supplied by the welding
FROM THE MAIN POWER SUPPLY OUTLET.
machine.
If checks are made inside the welding machine while it is live, this
may cause serious electric shock due to direct contact with live
Connecting the electrode-holder clamp welding cable
parts and/or injury due to direct contact with moving parts.
On the end take a special terminal that is used to close the uncovered
- Inspect the welding machine regularly, with a frequency depending
part of the electrode.
on use and the dustiness of the environment, and remove the dust
For welding machines supplied with a terminal, this cable is connected
deposited on the transformer, using a jet of dry compressed air
to the terminal with the symbol .
(max. 10 bar).
- At the same time make sure the electrical connections are tight and
Connecting the welding current return cable
check the wiring for damage to the insulation.
This is connected to the piece being welded or to the metal bench
- At the end of these operations re-assemble the panels of the
supporting it, as close as possible to the join being made. For welding
welding machine and screw the fastening screws right down.
machines supplied with a terminal, the cable is connected to the
- Never, ever carry out welding operations while the welding
machine is open.
terminal with the symbol .
- If necessary use a very thin layer of grease, at a high temperature,
to lubricate the moving parts of the regulators (threaded shaft,
6. WELDING: DESCRIPTION OF THE PROCEDURE
sliding surfaces, shunts etc.).
These welding machines consist of a drooping specification, single
- Replacing the power supply cable: before replacing the cable,
phase transformer and are suitable for welding with alternating current
identify the screw-connecting terminals L1 and L2 (N) on the
using coated electrodes (E 43 R type) based on the diameters given
switches (Fig.L).
on the data plate .
To switch on the welding machine operate the main switch (Fig. B-1).
The intensity of the supplied welding current can be adjusted
_______________(I)______________
continuously, by means of a manually operated magnetic shunt (Fig.
B-2), or step-by-step by means of a manually operated switch (Fig. B-
3).
MANUALE ISTRUZIONE
CHECK THE WELDING MACHINE MODEL.
N.B. In the case of a welding machine with switch, current adjustment
should be carried out with the main switch (Fig. B-1) in the O position
(off).
The value of the current setting, (I ) can be read in Amps on the
2
ATTENZIONE:
graduated scale (Fig. B-4) on the top or side panel of machines where
PRIMA DI UTILIZZARE LA SALDATRICE LEGGERE
it is provided.
ATTENTAMENTE IL MANUALE DI ISTRUZIONE!
THERMOSTATIC PROTECTION
SALDATRICI MANUALI AD ARCO PER ELETTRODO RIVESTITO
This welder is automatically protected from thermic overheating
(MMA) A SERVIZIO LIMITATO.
(thermostat automatic re-start). When the windings reach
Nota: Nel testo che segue verrà impiegato il termine “saldatrice” .
performance temperature, the protections cut off the supply circuit,
igniting the yellow lamp on the front panel (B-5). After a few minutes’
1. SICUREZZA GENERALE PER LA SALDATURA AD ARCO
cooling the protection will reopen the supply line and turn off the yellow
lamp. The welder is ready for further use.
WELDING
- Use electrodes suitable for working in alternating current.
- Evitare i contatti diretti con il circuito di saldatura; la tensione a
- The welding current must be regulated according to the diameter of
vuoto fornita dal generatore può essere pericolosa in talune
the electrode in use and the type of the joint to be carried out: see
- 4 -
… 4 …


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