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4.2 CONNECTION TO THE MAIN SUPPLY
This unit must be connected to a single phase 230V or 400V - 50 Hz/60 Hz + ground. . The selection of the
mains voltage should be done by putting the security disk of the voltage selector switch as refered in the machine's
frontal panel.
Main supply must be protected by fuses or circuit-breaker according to the value I1eff written on the
specifications of the power source.
It is strongly suggested to use a differential protection for the operator’s safety.
4.3 CONNECTION TO EARTH
For the operator's protection, the power source must be correctly grounded (according to the International
Protections Norms).
It is absolutely necessary to set a good earth connection with the green/yellow wire of the power cable. This
will avoid discharges caused by accidental contacts with grounded pieces. If no earth connection has been set, a high
risk of electric shock through the chassis of the unit remains possible.
5. WELDING
Connect the power source to the main supply and the ground.
Connect the ground cable and the electrode holder to the appropriate power connections.
Start up the power source with the switch ON/OFF, selecting the appropriated input voltage according to
mains.
The red indicator illuminates and indicates that the machine is under voltage.
Adjust welding current with potentiometer.
Place the electrode on the piece you have to weld in order to strike the arc.
6. MAINTENANCE
The arc welding equipment should be routinely maintained according to the manufacturers’ recommendations.
All access and service doors and covers should be closed and properly fastened when the arc welding equipment is
in operation. The arc welding equipment should not be modified in any way, except for those changes and
adjustments covered in the manufacturer’s instructions. In particular, the spark gaps of arc striking and stabilising
devices should be adjusted and maintained according to the manufacturer’s recommendations.
Before carrying out any internal checking or repair work, check that the power source has been disconnected
from the electrical installation by locking and guard devices. Ensure and avoid accidental connection of the plug to a
socket. Voltages are high and dangerous inside the machine.
In spite of their robustness, ours power sources require some regular maintenance. Each 6 months (more often
in dusty surroundings):
- The machine must be blown through with dry, oil free compressed air.
- Check for continuity all electrical connections.
- Check the connection of cables and flat top.
Check the good state, insulation and connection of all the equipment and electrical accessories: plugs and
flexible supply cables, conduits, connectors, extension cables, sockets on the power source, ground clamp and
electrode holder. These connections and mobile accessories are marked according to standards, if consistent with the
safety rules. They can either be controlled by you or by accredited firms.
-Repair or replace all defective accessories
-Check periodically that the electrical connections are tightened and do not heat.
Maintenance works of electrical equipment must be entrusted by qualified people (Section VI, Art. 46).
For 230V mains supply
For 400V mains supply
Positioning of security disk
