GENERAL
INSTALLATION
SITE
Locate the machine in an area where openings for cooling
air are not obstructed (forced circulation with fan); check that
TECHNICAL DATA
conductive dusts, corrosive vapours, humidity etc., will not
Technical data relative to the performance of the machine
enter machine.
may be found on a plate (back panel) with the following
symbols, whose meaning is explained below.
CONNECTION TO MAINS
-
Fig. B
1-
EUROPEAN Norm of reference, for safety and
construction of arc welding machines.
2-
Symbol for internal machine structure: inverter
transformer .
3-
Symbol for welding procedure provided: manual arc
welding with covered electrode.
4-
Symbol for power supply line: monophase alternating
voltage.
5-
Protection rating of casing: IP21 or IP22: it is protected
against solid foreign bodies of diam. 12.5mm (e.g.
fingers) and against drops of water falling vertically
(IP21) or with an inclination to the vertical of up to 15°
(Ip22).
6-
Performance of welding circuit:
- U0:
no-load voltage (welding circuit open).
- I2:
Normal welding current; indicates the welding
current adjustment range (minimum - maximum) at the
corresponding arc voltage.
- Ø:
diameter of electrodes that can be welded.
- nc
is the reference number of electrodes that can be
welded, starting with the welding machine at ambient
temperature, until the thermostat cuts in for the first
WARNING
time.
Failure to observe the above rules will make ineffective
- nc1
is the reference number of electrodes that can be
the safety system installed by the manufacturer (Class
welded in one hour starting with the welding machine at
1) with resulting risks for persons (eg. electric shock)
ambient temperature.
and objects (eg. fires).
- nh
is the AVERAGE VALUE for reference number of
electrodes that can be welded between thermostat
REPLACING THE POWER SUPPLY CABLE
reset and cut in.
THIS OPERATION MUST BE CARRIED OUT BY
- nh1
is the reference number of electrodes that can be
SKILLED PERSONNEL!
welded in one hour starting with the welding machine at
running temperature.
7-
Specifications for the power line:
- U1:
Alternating voltage and power supply frequency
for the machine (allowed limits ±15%)
CONNECTION OF THE WELDING CABLES
-
: Size of delayed action fuses to be provided
to protect the line
- I1max:
Maximum current absorbed by the line
8-
H
: transformer insulation class
9-
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 machine in your possession should be read
directly on the rating plate of the machine it self.
THERMOSTATIC PROTECTION
These welders are composed of a monophase transformer
This welder is automatically protected from thermic
with a drooping characteristic, and are suitable for welding
overheating (thermostat automatic re-start). When the
in alternate current using stick electrodes (type E 43R).
windings reach performance temperature, the protections
Welding current may be regulated with continuity, using a
cut off the supply circuit, igniting the yellow lamp on the front
manual magnetic shunt (1).
panel (
3
). After a few minutes’ cooling the protection will
The value of the current (I ) may be read on the Amp.
reopen the supply line and turn off the yellow lamp. The
2
welder is ready for further use.
graduated scale (2) on the upper panel, and corresponds to
the voltage of the arc (U ) according to the equation:
2
U = (18 + 0,04 I ) V (EN 50060).
2
2
Fig. A
Before making any electrical connection check that the
EN 50060
European Standard relativeto welders for
mains voltage ratings of the data table correspond with the
limited duty
voltage of the workplace. The machine is to be fed with two
conductors (2 phases or phase-neutral) plus a third
separate one designed for the protective earth connection
(PE); this conductor is coloured yellow/green.
For welders with double voltage supply, it is necessary to set
the blocking screw of the voltage-reverse switch in the
position corre sponding to the voltage really available (see
example below).
Fig. C
PLUG:
CONNECT TO THE MAINS CABLE A
STANDARDIZED PLUG OF ADEQUATE CAPACITY (2P +
T) AND SET A MAINS SOCKET EQUIPPED WITH FUSES
OR AN AUTO MATIC SWITCH.THE CORRECT
TERMINAL IS TO BE CONNECTED TO THE GROUND
CONDUCTOR (YELLOW-GREEN) OF THE MAINS
V O LT AG E S U P P L Y.
T A B L E 1
S H O W S T H E
RECOMMENDED AMPERE VALUES OF DELAYED TYPE
FUSES SELECTED ACCORDING TO MAXIMUM
NOMINAL MAINS CURRENT OF WELDER AND
NOMINAL MAINS VOLTAGE.
TABLE 1
N.B
.: For welders with clamp this cable must be connected
to the clamp with this symbol:
&
Before replacing the cable, find the screw connection
terminals
L1 and L2 on the rocker switch and/or rotary switch.
(Fig - D)
- WORK CABLE
This must be directly connected to the workpiece or the
work bench.
WARNING!
: make sure contact to
workpiece is adequate by avoiding varnished surfaces
and/or non-metallic materials.
- COLLET CABLE
This has a special clamp on the terminal to attach to the
- 20 -
