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21. Do not use the welding machine if its cables are damaged in any way.
22. Make sure that the earthing system of the electric equipment is correctly
connected and operational.
23. The operator must be insulated from the metal components connected to
the return wire.
24. The earthing of the piece being worked could increase the risk of injury to
the operator.
25. EN 60974-1 Standard: Open-circuit voltage. During the operation of the
machine, the highest voltage, with which it is possible to come into contact, is
the open-circuit voltage between the welding clamps. In our generator this
voltage is 58V.
26. The maximum open-circuit voltage of the welding machines is established
by national and international standards (EN 60974-1) depending on the type
of weld current to be used, on its waveform and on the hazards arising from
the work place. These values are not applicable to the strike currents and
those for stabilisation of the arc that could be above it.
27. The open-circuit voltage, for as many adjustments as possible, must never
exceed the values relating to the various cases shown in the following table:
Case Working conditions
Open-circuit voltage
1
Places with increased risk of
electric shock
DC current: 113V
peak value
AC current: 68V
peak value and
48V effective
2
Places without increased risk
of electric shock
DC current: 113V
peak value
AC current: 113V
peak value and
80V effective
3
Torches held mechanically
with increased protection for
the operator
DC current: 141V
peak value
AC current: 141V
peak value and
100V effective
28. In case 1, the dc welding machines with rectifier must be built in such a
way that, in case of a fault developing in the rectifier (for example open circuit,
short circuit or lack of power), the permitted values cannot be exceeded. The
welding machines of this type can be marked with the symbol:
S
29. Before opening the machine switch off the machine and disconnect it from
the power socket.
30. Only personnel authorised by this company can carry out maintenance on
the machine.
NOTE:
Device complies with IEC 61000-3-12.
Working ambient temperature between -10 and +40 °C.
Relative humidity below 90% at +20 °C.
Up to 3000 m altitude.
