Telwin FORCE 168 Mode D'emploi page 5

1- Protection rating of the covering.
2- Symbol for power supply line:
1~: single phase alternating voltage;
3~: three phase alternating voltage.
3- 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).
4- Symbol for welding procedure provided.
5- Symbol for internal structure of the welding machine.
6- EUROPEAN standard of reference, for safety and construction of
arc welding machines.
7- Manufacturer's serial number for welding machine identification
(indispensable for technical assistance, requesting spare parts,
discovering product origin).
8- Performance of the welding circuit:
- U : maximum no-load voltage.
0
- I /U : current and corresponding normalised voltage that the
2 2
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 minutes 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 stand-by 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.
9- Technical specifications for power supply line:
- U : Alternating voltage and power supply frequency of welding
1
machine (allowed limit ±10%):
- I : Maximum current absorbed by the line.
1 max
- I : effective current supplied.
1eff
10- : Size of delayed action fuses to be used to protect the
power line.
11- 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.
OTHER TECHNICAL DATA
- WELDING MACHINE:
- see table 1 (TAB.1)
- %USE AT 20°C (if present on the top cover of the welding
machine)
USE AT 20°C, it gives, for each diameter (Ø ELECTRODE), the
number of weldable electrodes within an interval of 10 minutes
(ELECTRODES 10 MIN) at 20°C with a pause of 20 seconds for
each electrode change; this datum is given also in percentage
(%USE) which is the value in comparison with the maximum
number of weldable electrodes.
- ELECTRODE HOLDER CLAMP: see table 2 (TAB.2)
The weight of the welding machine is given in the table 1 (TAB.1)
4. DESCRIPTION OF THE WELDING MACHINE
The unit is comprised of power modules which have been developed
on a specially printed circuit designed to maximise reliability and
reduce maintainance.
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 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: this changes the
alternate voltage/current supplied by 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 modulates
the commands of the IGBT drivers, which control Regulation.
Determines the dynamic response of the current while the
electrode melts (instantaneous short circuits), and supervises
the safety systems.
The "DUAL VOLTAGE AUTOMATIC" model has a device that
automatically recognises the power supply voltage (115V AC- 230V
AC) and sets up the machine for correct operation.
The user will be able to understand whether the machine power
supply is 115V AC or 230V AC from the colour of the LED (Fig C (3)).
- GREEN LED shows that the machine is connected to a 230V AC
power supply.
- ORANGE LED shows that the machine is connected to a 115V AC
power supply.
During operation at 115V AC it is possible that prolonged and
sizeable voltage surges will cause the machine to switch to
230V AC operation for safety.
Fig. B
In such circumstances, to resume welding, the machine must
be switched off and on again.
Wait until the LED (Fig.C(3)) has gone out completely before
switching on again.
CONTROL, REGULATION AND CONNECTION DEVICES
WELDING MACHINE
Front Panel
1 - Positive quick plug (+) to connect welding cable.
2 - 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 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: the machine is blocked:
the power supply voltage is 15% above or below the rating plate
value. WARNING: Exceeding the upper voltage limit, as
above, will cause serious damage to the device.
- ANTI STICK protection: automatically shuts down the welding
machine if the electrode sticks to the material being welded so
that it can be removed manually without damaging the
electrode holder clamp.
3- GREEN LED : Connection to the mains, machine ready to work.
4 - Potentiometer to regulate welding current with graduated scale in
Amps, which also allows regulation during welding.
(The "DUAL VOLTAGE AUTOMATIC" model has a double
graduated Ampere scale).
5 - Negative quick plug (-) to connect welding cable.
Back panel
1 - Mains cable with E.E.C. 2p plug + (W
(For the "DUAL VOLTAGE AUTOMATIC" model the cable has no
plug).
2 - General luminous switch O/OFF - I/ON.
5. INSTALLATION
________________________________________________________________________________
WARNING! CARRY OUT ALL INSTALLATION OPERATIONS
AND ELECTRICAL CONNECTIONS WITH THE WELDING
MACHINE COMPLETELY SWITCHED OFF AND DISCONNECTED
FROM THE POWER SUPPLY OUTLET.
THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND
EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL.
________________________________________________________________________________
Unpack the welding machine, assemble the separate parts contained
in the package.
Assembling the return cable-clamp
Assembling the welding cable-electrode holder clamp
HOW TO LIFT THE WELDING MACHINE
All the welding machines described in this handbook should be lifted
using the handle or strap supplied if provided for the particular model
(fitted as described in FIG. L).
POSITION OF THE WELDING MACHINE
Choose the place to install the welding machine so that the cooling air
inlets and outlets are not obstructed (forced circulation by fan, if
present); at the same time make sure that conductive dusts, corrosive
vapours, humidity etc. will not be sucked into the machine.
Leave at least 250mm free space around the welding machine.
______________________________________________
WARNING! Position the welding machine on a flat surface
with sufficient carrying capacity for its weight, to prevent it from
tipping or moving hazardously.
______________________________________________
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, make sure the rating data
of the welding machine correspond to the mains voltage and
frequency available at the place of installation.
- The welding machine should only be connected to a power supply
system with the neutral conductor connected to earth.
- To ensure protection against indirect contact use residual current
devices of the following types:
- Type A ( ) for single phase machines;
- Type B (
- To comply with the requirements of the EN 61000-3-11 (Flicker)
standard we recommend connecting the welding machine to
interface points of the power supply that have an impedance of less
than Zmax =0.24 ohm.
- 5 -
Fig. C
Fig. D
).
PREPARATION
Fig. E
Fig. F
) for 3-phase machines.