Bedienungsanleitung Telwin MODERNA 3.160 (Seite 4 von 56) (Alle Sprachen)

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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

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

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 -

Telwin MODERNA 3.160 Seite 4

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