- 6 -
line (primary) means there is a drastic reduction in the volume of both the
transformer and the levelling reactance.
welding machine with extremely reduced weigh
its advantages of easy handling and transportation.
OPTIONAL AC:
- MMA welding Kit.
3. TECHNICAL
DA
The most important data regarding use and performance of the welding
machine are summarised on the rating plate and hav
meaning:
Fig. A
1- Pr
2- Symbol for power supply line:
1~: single phase alternating voltage;
3- Symbol S: indicates that welding operations may be carried out in
environments with heightened risk of electric shock (e.g
to large metallic volumes).
4- Symbol for welding proc
5- Symbol for internal structure of the welding machine
6- EUROPEAN standard of reference, for saf
welding machines.
7- Manufac
(indispensable for technical assistance, r
discovering product origin).
8- Performance of the welding circuit:
- U
0
: maximum no-load voltage.
- I
2
/U
2
: current and corresponding normalised voltage that the
welding machine can supply during welding
- X : Duty c
can supply the corresponding current (same column). It is
expressed as %, based on a 10 minutes cycle (e.g. 60% = 6 minut
working, 4 minutes pause, and so on).
If the usage factors (on the plate, referring to a 40°C envir
are exceeded
machine will remain in stand-by until its temperatur
within the allowed limits).
- A/ V-A /V : show
(minimum-maximum) at the corresponding arc voltage
9- Technical specica
- U
1
: Alternating voltage and power supply frequency of welding
machine (allowed limit ±10%):
- I
1 max
: Maximum current absorbed by the line.
- I
1e
: eective current supplied.
10-
: Size of delayed action fuses to be used to prot
line.
11- Symbols referring to saf
chapter 1
Note:
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 DA
- WELDING MACHINE:
- see table 1 (
- %USE A
USE A
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 v
comparison with the maximum number of weldable electrodes.
- ELEC: see table 2 (T
The weight of the w
4. DESCRIPTION OF THE
The unit is comprised of power modules which hav
a specially printed circuit designed to maximise reliability and reduc
maintainance.
Fig. B
1- Pow
2- Transistors and drivers switching bridge (IGBT).
It turns the mains rectied voltage into high frequency alternate
voltage and permits power regulation ac
voltage of the weld to be done.
3- High frequency transformer: the primar
voltage converted by Block 2, it has the function of adapting voltage
and current to the values required b
simultaneously, isola
4- Secondary rectier bridge with induc
alternate voltage/current supplied by the sec
continuous current/voltage at a low w
5- Electronic and regulation board: this instantly checks the value of the
welding current against that selected by the user
commands of the IGBT drivers, which con
the dynamic response of the current while the electrode melts
(instantaneous short circuits), and supervises the safety systems.
The ”DUAL
recognises the power supply v
machine for correct operation.
The user will be able to understand whether the machine power supply is
115V AC or 230V AC from the c(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 A
sizeable voltage surges will cause the machine to switch to 230V
AC operation f
In such circumstances
switched o and on again.
W
switching on again.
CONTROL, REGULA
WELDING MACHINE
Front P
Fig. C
1- Positiv
2- YELLOW LED: normally o
current cannot ow due to one of the follo
- Thermal protection: inside the machine the temperature is
excessive
normal temperature is reached. Onc
automatic.
- Mains over/ undervoltage protection: the machine is blocked:
the power supply voltage is 15% abov
value. WARNING: Ex
will cause serious damage to the device.
- ANTI STICK protection: aut
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: Connec
4- Potentiometer to regula
Amps, which also allows regulation during w
(
Ampere scale).
5- Negative quick plug (-) to connect welding cable
Back panel
Fig. D
1- Mains cable with E.E.C. 2p plug + (
).
(F
2- General luminous switch O/OFF - I/ON.
5. INST
W! CARRY OUT ALL INST
AND ELECTRICAL CONNECTIONS WITH
COMPLETEL
POWER SUPPL
THE ELECTRICAL CONNECTIONS MUST BE MADE ONL
EXCL
PREP
Unpack the welding machine, assemble the separate parts contained in
the package.
Assembling the return cable-clamp
Fig. E
