stayer POTENZA 160 B Instructions D'emploi page 14

gb
Make sure that an authorised expert evaluates the conditions
beforehand to see if such risk exists and adopt the protective
measures described in necessary regulations.
Additional warnings.
• Do not use the welding machine for purposes other than
those described, for example to thaw frozen water pipes.
• Place the welding machine on a flat stable surface, and
make sure that it cannot move.
It must be positioned in such a way as to allow it to be
controlled during use but without the risk of being covered
with welding sparks.
• Do not work with the welding machine hung from the body,
using straps or any other device.
• Do not lift the welding machine. No lifting devices are fitted
on the machine.
• Do not use cables with damaged insulation or loose
connections.
DESCRIPTION OF THE WELDING MACHINE
The welding machine is a high frequency current transformer
for manual arc welding using MMA coated electrodes and TIG
with a torch that strikes the arc on contact.
The welding machine is built using electronic INVERTER
technology.
The delivered current is direct.
The electrical characteristic of the transformer is of the falling
type.
This manual refers to a range of welding machines that differ in
some of their characteristics.
Identify your model in Fig. 1.
Main parts Fig. 1
A) Power cable.
B) ON/OFF switch.
D) Welding current adjustment.
F) Display
H) Couplings for welding cables.
Technical data
A data plate is affixed to the welding machine. Fig. 2 shows
an example of this plate.
A) Constructor name and address.
B) European reference standard for the construction and sa-
fety of welding equipment.
C) Symbol of the welding machine internal structure.
D) Symbol of the foreseen welding process: D1: MMA wel-
ding; D2: TIG welding.
E) Symbol of the continuous current delivered
F) Input power required:
1˜ alternate single phase voltage, frequency F1: from electri-
cal power supply; F2: from motor generator
G) Level of protection from solids and liquids.
H) Symbol indicating the possibility to use the welding machi-
ne in environments potentially subject to electric discharges.
I) Welding circuit performance.
U0V Minimum and maximum open circuit voltage (open wel-
ding circuit).
I2, U2 Current and corresponding normalised voltage delive-
red by the welding machine.
X Duty cycle. Indicate how long the welding machine can
work for and how long it must rest for in order to cool down.
The time is expressed in % on the basis of a 10 minute cycle
(e.g. 60% means 6 min. work and 4 min. rest).
A/V Current adjustment field and corresponding arc voltage.
J) Power supply data.
U1 Input voltage (permitted tolerance: +/- 10%).
I1 eff Effective absorbed current.
I1 max Maximum absorbed current.
K) Serial number
L) Weight
M) Safety symbols: Refer to Safety Warnings.
STARTING UP
• Connections to the mains must be made by expert
and qualified personnel.
• Make sure that the welding machine is switched off and
the plug is not in the power socket before carrying out this
procedure.
• Make sure that the power socket that the welding machine
is plugged into is protected by safety devices (fuses or
automatic switch) and grounded.
• The device must be connected only to a supply system,
with an earthed 'neutral' lead.
ASSEMBLY AND ELECTRICAL
CONNECTIONS
Check that the electrical supply delivers the voltage and
frequency corresponding to the welding machine and that it
is fitted with a delayed fuse suited to the maximum delivered
rated current (I2max) Fig. 3,1.
The requirements set out in the IEC/EN61000-3-12 standard
do not apply to this equipment. If this equipment is connected
to low voltage power supply network, either the installer or
the user is responsible for checking that this can be done
(consult the distribution system operator if required).
In order to comply with the requirements set out in the
EN61000-3-11 (Flicker) standard, it is advisable to connect
the welder to the supply network interface points having an
impedance lower than the reference Zmax = Fig.3,4.
To comply with the requirements of the EN61000-3-12
standard, the welding machine must be connected to the
interface points of the power supply network that present a
short-circuit power equal to or greater than 8062 kW.
Plug. If the welding machine is not fitted with a plug, fit a
normalised plug (2P+T for 1Ph) of suitable capacity to the
power cable Fig.3,2
CONNECTION TO MOTOR GENERATORS
Some welding machines may be powered by a motor
generator. Make sure that this has a power of at least 6 kVA
and does not deliver a voltage greater than 270V.
PREPARING THE WELDING CIRCUIT MMA
Connect the ground lead** to the welding machine and to
the piece to be welded, as close as possible to the point to
be welded.
Connect the cable with the electrode holder gripper** to the
welding machine and mount the electrode on the gripper.
In welding machines that deliver direct current, most of the
electrodes are connected to the positive attachment.
- 14 -