Bedienungsanleitung Telwin TECHNOLOGY 170 (Seite 7 von 40) (Alle Sprachen)

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- Contrôler qu’il n’y a pas un court-circuit en sortie de

GENERAL

machine. Si tel est le cas, procéder à l’élimination de

This model is a constant current rectifier for arc welding

l’inconvénient.

controlled by a transistor bridge (IGBT) with normal

- Les raccords du circuit de soudage soient correctement

frequency of 32khz.

effectués, spécialement que la pince du câble de masse

The specific characteristics of this regulation system

soit effectivement reliée à la pièce, sans interposition de

(INVERTER) i.e. high speed and precise regulation, ensure

matériaux isolants (par exemple des peintures).

a high quality result with both stick electrode and TIG

welding (D.C.).

The "inverter" system, regulated at the input of the primary

____________(GB)____________

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 machine.

INSTRUCTION MANUAL

The unit is comprised of power modules which have been

developed on a specially printed circuit designed to

maximise reliability and reduce maintainance.

DIAGRAM

Fig. A

DESCRIPTION :

1- Mains input (single phase), rectifier unit and

condenser.

2 - Transistors and drivers switching bridge (IGBT).

It turns the mains rectified voltage into high frequency

alternate voltage (32 khz) and permits power

regulation according to the current / voltage of the weld

to be done.

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 from the mains.

4 - Secondary rectifier bridge with inductance:

- Disconnect the power supply before replacing torch

this changes the alternate voltage/current supplied by

consumables.

the secondary windings into continuous current / voltage

at a low wave-length.

5 - Electronic and regulation board:

this instantly checks the value of the welding current

against that selected by the user, it m o d u l a t e s t h e

commands of the IGBT drivers, which control

regulation.

The control board also determines the dynamic

response of the current transient during the phases of

electrode fusion (instant short circuit), and is

responsible for the safety system.

CONNECTION, REGULATION, AND SIGNALLING

DEVICES

Back panel

Fig. B

1 - mains cable with E.E.C. 2p plug + (W).

Cable of models 170 and 200 is without plug.

2 - General luminous switch O/OFF - I/ON

Front Panel

Fig. C

1 - Positive quick plug (+) to connect welding cable

2 - Negative quick plug (-) to connect welding cable

3 - Potentiometer to regulate welding current with

graduated scale in Amps, which also allows regulation

during welding.

4 - Yellow led: normally off, when ON it means that the

welding current cannot flow due to one of the following

faults:

- Thermal protection: inside the machine the

WARNING:

BEFORE USING THE MACHINE READ THE

INSTRUCTION MANUAL CAREFULLY!

SAFETY RULES

- Avoid direct contact with the welding circuit, the no-load

voltage supplied by the generator can be dangerous.

- Unplug the mains before installing and before making

any check or repair operation.

- Accomplish mains connection according to general

safety rules.

- Make sure that the supply plug is correctly connected to

earth.

- Do not use the machine in damp or wet places and do not

weld in the rain.

- Do not use cables with worn insulation or loose

connections.

- Do not weld on containers or pipes which have held

flammable materials or gaseous or liquid combustibles.

- Avoid operating on materials cleaned with chlorinated

solvents or near such solvents.

- Do not weld on containers under pressure

- Remove from working area all flammable materials

(e.g.wood, paper, ...).

- Provide adequate ventilation or facilities for removal of

welding fumes.

- Always protect your eyes with fitting glasses. Use proper

protective clothing and gloves and avoid exposing skin to

the ultraviolet rays produced by the arc.

- Do not use the machine to defrost the piping

- Place the machine on a level surface to prevent

overturning.

The welding machine should be connected only and

exclusively to a power source with the neutral lead

connected to earth.

- 7 -

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