Telwin LINEAR 550I XD Bedienungsanleitung Seite 6

This welding machine is a source of current for arc welding, manufactured for MMA
welding of coated electrodes (rutile, acid, basic).
speed and adjustment precision give excellent welding quality.
Adjustment with the "inverter" system on the power line (primary) input also determines
a drastic reduction in volume both of the transformer and the levelling reactance,
allowing manufacture of a welding machine with extremely contained volume and
weight, enhancing its manageability and movement.
Welding machine (Fig. B)
MMA
- Arc force (DYNAMIC ARC) and welding current adjustment.
- Anti-stick protection.
- Set welding current shown on display.
PROTECTION
- Thermostatic safeguard.
- Protection against irregular voltage (power supply voltage too high or too low).
- Anti-stick (MMA).
- MMA welding kit.
- Wheels kit.
- Trolley.
The most important data regarding use and performance of the welding machine are
summarised on the rating plate and have the following meaning:
EUROPEAN standard of reference, for safety and construction of arc welding
machines.
manufacturer's name and address.
product model.
Symbol for internal structure of the welding machine.
Symbol for welding procedure provided.
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).
Symbol for power supply line:
1~ : single phase alternating voltage;
3~ : 3-phase alternating voltage.
Protection rating of the covering.
- U : Alternating voltage and power supply frequency of welding machine (allowed
limit ±10%).
- I : Maximum current absorbed by the line.
- I : effective current supplied.
Performance of the welding circuit:
- U : maximum no-load voltage (open welding circuit).
- I : current and corresponding normalised voltage that the welding machine
can supply during welding.
- X : Duty cycle: indicates the time for which the welding machine can supply the
corresponding current (same column). It is expressed as %, based on a 10 min.
cycle (e.g. 60% = 6 minutes working, 4 minutes pause, and so on)
If the usage factors (on the plate, referring to a 40°C environment) are exceeded,
the thermal safeguard will trigger (the welding machine will remain in standby
until its temperature returns within the allowed limits).
- : shows the range of adjustment for the welding current (minimum
maximum) at the corresponding arc voltage.
technical assistance, requesting spare parts, discovering product origin).
: Size of delayed action fuses to be used to protect the power line.
Symbols referring to safety regulations, whose meaning is given in chapter 1
"General safety considerations for arc welding".
Note: The data plate shown above is an example to give the meaning of the symbols
and numbers; the exact values of technical data for the welding machine in your
possession must be checked directly on the data plate of the welding machine itself.
1- Control panel (see description);
2- Positive (+) quick coupling for connecting the welding cable;
3- Negative (-) quick coupling for connecting the welding cable;
4- Main ON/OFF switch;
5- Power cable;
1- Numerical display
2- Yellow indicator led:
exceeding the upper voltage limit can seriously damage the device).
3- Green indicator led:
the machine is powered but the welding circuit is not active. Reactivation is
automatic as soon as the welding process starts).
4- Knob for adjustment of welding current. The value set is indicated on the display.
5- Knob for adjustment of "DYNAMIC ARC" dynamic overcurrent.
Percentage value compared to the pre-selected welding current. This adjustment
and makes it possible to use different types of electrodes. Settings from 0 to 100%.
PREPARATION
Unpack the welding machine and assemble the separate parts included in the
package.
Choose the place where the welding machine is to be installed so that there are no
obstructions to the cooling air inlets and outlets; at the same time make sure that
conductive dust, corrosive vapours, humidity etc. cannot be drawn into the machine.
Leave at least 250 mm of free space all around the welding machine.
- Before making any electrical connection, check the rating plate data on the welding
machine to make sure they correspond to the voltage and frequency of the available
power supply where the machine is to be installed.
- The welding machine must be connected only and exclusively to a power supply with
the neutral conductor connected to earth.
- To guarantee protection against indirect contact use the following types of residual
current devices:
- 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 Zmax = 0.12 ohm.
- The IEC/EN 61000-3-12 Standard does not apply to the welding machine.
If the welding machine is connected to an electrical grid, the installer or user must
make sure that the machine can indeed be connected (if necessary, consult the
company that manages the electrical grid).
earth terminal should be connected to the earth conductor (yellow-green) of the power
supply line.
Table 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.
Table 1 (TAB. 1) gives the recommended values for welding cables (in mm
to the maximum energy supplied by the welding machine.
In addition:
- Fully rotate the welding cable connectors in the quick couplings (if present), to
guarantee perfect electric contact; if this is not the case the connectors will overheat
- Use the shortest welding cables possible.
- Do not use metal structures that are not part of the workpiece to replace the welding
current return cable; this can endanger safety and give unsatisfactory welding
results.
Almost all the coated electrodes should be connected to the positive pole (+) of the
- 6 -
) according
2