Introduction And General Description; Technical Data - Telwin LINEAR 350I Bedienungsanleitung

- It is forbidden to use the handles as a means of welding machine suspension.
The safety guards and moving parts of the covering of the welding machine
and of the wire feeder should be in their proper positions before connecting the
welding machine to the power supply.
WARNING! Any manual operation carried out on the moving parts of the wire
feeder, for example:
- Replacing rollers and/or the wire guide;
- Inserting wire in the rollers;
- Loading the wire reel;
- Cleaning the rollers, the gears and the area underneath them;
- Lubricating the gears.
SHOULD BE CARRIED OUT WITH THE WELDING MACHINE SWITCHED OFF
AND DISCONNECTED FROM THE POWER SUPPLY OUTLET.
2. INTRODUCTION AND GENERAL DESCRIPTION
This welding machine is a source of current for arc welding, manufactured for MMA
welding of coated electrodes (rutile, acid, basic).
The specific characteristics of this welding machine (INVERTER), such as the high
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)
2.1 MAIN CHARACTERISTICS
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).
2.2 OPTIONAL ACCESSORIES
- MMA welding kit.
- Auto-darkening mask: with fixed or adjustable filter.
- Wheels kit.
- Trolley.
3. TECHNICAL DATA
3.1 DATA PLATE
The most important data regarding use and performance of the welding machine are
summarised on the rating plate and have the following meaning:
1- EUROPEAN standard of reference, for safety and construction of arc welding
machines.
2- manufacturer's name and address.
3- product model.
4- Symbol for internal structure of the welding machine.
5- Symbol for welding procedure provided.
6- 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).
7- Symbol for power supply line:
1~ : single phase alternating voltage;
3~ : 3-phase alternating voltage.
8- Protection rating of the covering.
9- Technical specifications for power supply line:
: Alternating voltage and power supply frequency of welding machine (allowed
- U
1
limit ±10%).
- I : Maximum current absorbed by the line.
1 max
- I : effective current supplied.
1eff
10- Performance of the welding circuit:
- U : maximum no-load voltage (open welding circuit).
0
/U
- I : current and corresponding normalised voltage that the welding machine
2 2
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).
- A/V-A/V : shows the range of adjustment for the welding current (minimum
maximum) at the corresponding arc voltage.
11- Manufacturer's serial number for welding machine identification (indispensable for
technical assistance, requesting spare parts, discovering product origin).
12-
: Size of delayed action fuses to be used to protect the power line.
13- 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.
3.2 OTHER TECHNICAL DATA
- WELDING MACHINE: see table 1 (TAB. 1)
- ELECTRODE-HOLDER CLAMP: see table 2 (TAB. 2)
The weight is of the welding machine is outlined on table 1 (TAB. 1).
4. DESCRIPTION OF THE WELDING MACHINE
4.1 CONTROL, ADJUSTMENT AND CONNECTION DEVICES
Fig. A
Fig. B
At the front:
1- Control panel (see description);
2- Positive (+) quick coupling for connecting the welding cable;
3- Negative (-) quick coupling for connecting the welding cable;
At the back:
4- Main ON/OFF switch;
5- Power cable;
4.1.2 WELDING MACHINE CONTROL PANEL
1- Numerical display
2- Yellow indicator led:
a) fixed: activation of safety thermostat, over/undervoltage (ATTENTION:
exceeding the upper voltage limit can seriously damage the device).
b) flashing: anti-stick activation.
3- Green indicator led:
a) fixed: presence of mains voltage and on welding circuit.
b) flashing: stand-by mode (operating status at low energy consumption where
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
improves welding fluidity, prevents the electrode from adhering to the workpiece
and makes it possible to use different types of electrodes. Settings from 0 to 100%.
5. INSTALLATION
ATTENTION! THE WELDING MACHINE MUST BE TURNED OFF AND
DISCONNECTED FROM THE MAINS BEFORE COMMENCING ANY
INSTALLATION AND POWER CONNECTION OPERATIONS.
THE ELECTRICAL CONNECTIONS MUST ONLY BE CARRIED OUT BY EXPERT
OR QUALIFIED TECHNICIANS.
PREPARATION
Unpack the welding machine and assemble the separate parts included in the
package.
Assembling the clamp-return cable Fig. D
Assembling the welding cable-electrode holder clamp FIG. E
5.1 POSITIONING THE WELDING MACHINE
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.
WARNING! Position the welding machine on a level surface with
sufficient load-bearing capacity, so that it cannot be tipped over or
shift dangerously.
5.2 CONNECTION TO THE MAIN POWER SUPPLY
- 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).
5.2.1 Plug and outlet
Connect a normalised plug (3P + P.E) - having sufficient capacity- to the power cable
and prepare a mains outlet fitted with fuses or an automatic circuit-breaker; the special
earth terminal should be connected to the earth conductor (yellow-green) of the power
supply line.
Table (TAB. 1) 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.
WARNING! Non-compliance with the above regulations renders
the manufacturer's safety system (class I) inefficient, with resulting
serious risks to people (e.g. electric shock) and things (e.g. fire).
5.3 WELDING CIRCUIT CONNECTION
5.3.1 Recommendations
ATTENTION! BEFORE
CONNECTIONS, MAKE SURE THE WELDING MACHINE IS OFF AND
DISCONNECTED FROM THE MAINS.
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
with consequent fast deterioration and loss of efficiency.
- 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.
5.3.2 WELDING CIRCUIT CONNECTIONS IN MMA MODE
Almost all the coated electrodes should be connected to the positive pole (+) of the
- 6 -
Fig. C
CARRYING OUT THE FOLLOWING
2
) according