Bedienungsanleitung Telwin TECHNOLOGY 150 (Seite 8 von 40) (Alle Sprachen)

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temperature is excessive. The machine is ON but does

not deliver current until a normal temperature is

reached. Once this happens the re-start is automatic.

- Mains over/undervoltage protection: when mains

EARTH OF WELDING MACHINE (Table 1)

voltage is either too high or too low the machine is

blocked.

WARNING: none of the welding machines described in this

- Short circuit protection: in case there is a short-

manual is equipped with a lifting device.

circuit lasting more than 1.5 sec. (electrode sticking),

the machine stops. The re-start is automatic.

INSTALLATION

5- Function selector: used to set the machine dynamics:

SITE

1- TIG position, for TIG welding with scratch strike,

Locate the machine in an area where openings for cooling

gives maximum stability to arc current.

air are not obstructed (forced circulation with fan); check that

2- HARD position, to obtain welding dynamics suited to

conductive dusts, corrosive vapours, humidity etc., will not

hard electrodes (basic, aluminium etc...), gives

enter machine.

maximum flowability.

3- SOFT position, for welding with “soft” electrodes (rutile,

CONNECTION TO MAINS

stainless steel, etc.), gives maximum flowability and

- Before making any electrical connection check that the

stability to arc current.

technical data (on machine's back panel) corresponds to

the voltage and frequency of the mains at the installation

TECHNICAL DATA

site.

Technical data relative to the performance of the machine

PLUG:

may be found on a plate (back panel) with the following

- Model 150 is normally equipped with mains cable with 2

symbols, whose meaning is explained below.

pin E.E.C. standard plug + earth protection (PE) 16A/250V.

It can therefore be connected to a corresponding socket

Fig. D

which must have a protection contact connected to the PE

conductor of the mains. With models 170 and 200 it is

necessary to connect the terminals of the mains cable to a

standardized 2P plug + (PE) with capacity of 20 ÷ 25A.

PAY THE UTMOST ATTENTION that the yellow/green

conductor of the cable is correctly connected to the

terminal (PE) of the plug.

- The mains must be protected with delayed fuses or an

automatic differential switch, for the correct dimensions of

the mains (power/current fuse capacity), refer to data on

machine's identification plate.

WARNING

Failure to observe the above rules will make ineffective

the safety system installed by the manufacturer (Class

1) with resulting risks for persons (eg. electric shock)

and objects (eg. Fires).

CONNECTION OF THE WELDING CABLES

ALL CONNECTIONS TO THE WELDING CIRCUIT MUST

BE CARRIED OUT WITH THE MACHINE STRICTLY

ISOLATED FROM THE MAINS.

- Welding cable - electrode holder: this is normally

connected to the positive pole (+), (see paragraph

'welding'').

- Return cable - work: this is normally connected to the

negative pole (-) the work clamp, at the opposite end, must

be connected to the work piece or a metallic work bench,

AS CLOSE AS POSSIBLE TO THE JOINT TO BE MADE.

WARNING:

- Connecting cables must be turned fully into the quick plugs

to ensure a good electrical contact, loose connections will

cause overheating, rapid deterioration and loss in

efficiency.

- Avoid using welding cables of length over 10m.

- Avoid using metal structures which are not part of the

workpiece to substitute the return cable of the welding

current: this could jeopardise safety and result in poor

welding.

WELDING

- Most stick electrodes are connected to the positive pole,

although certain types must be connected to the negative

machine in your possession should be read directly on

the rating plate of the machine it self.

1- EUROPEAN Norm of reference, for safety and

construction of arc welding machines.

2- Symbol for internal machine structure: inverter

transformer -rectifier.

3- Symbol for welding procedure provided: manual arc

welding with covered electrode.

4- Symbol S: indicates that welding operations may be

carried out in environments with heightened risk of

electric shock (e.g. very close to large metallic volumes).

5- Symbol for power supply line: monophase alternating

voltage.

6- Protection degree: IP 23. Protected against solid foreign

bodies of diam.≥12.5mm (e.g. fingers) and against

vertical fall of water drops with inclination up to 60° from

the vertical.

7 -Performance of welding circuit:

- U : maximum peak no-load voltage (welding circuit

open).

- I/U:current and corresponding normalised voltage [U2

= (20+0.04 I2) V] that the machine can deliver during

welding.

- X: Duty cycle: indicates the time for which the machine

can deliver the corresponding current (same column).

Expressed in %,on the basis of a 10min cycle (e.g. 60% =

6 minutes work, 4 minutes wait; and so on).

- A/V-A/V: Indicates the welding current adjustment

range (minimum - maximum) at the corresponding arc

voltage.

8- Technical specifications for power supply line:

- U : Alternating voltage and power supply frequency of

machine (limit allowed ±15%):

- I : maximum current consumed by the line.

- I :maximum effective current consumed

1eff

9- Value of delayed action fuses to be used to

protect the power line.

- Symbols referring to safety standards

10- Manufacturer’s serial number. Machine identification

(indispensable for technical assistance, requesting

spare parts, discovering product origin).

Note: The plate example given shows the meaning of the

symbols and figures; the exact rating values for the

- 8 -

Telwin TECHNOLOGY 150 Seite 8

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