Nippon Gases 2719135, Руководство по эксплуатации и технике безопасности, Страница: 8 / 44

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MICROTIG DC 162 / 202 PULSE
2.2. Electric safety
Connection to the power supply
Before connecting your appliance, check that:
- The electrical meter, the overcurrent protection device and the electrical installation are
compatible with the maximum power and supply voltage of your welding equipment (indicated
on the nameplate).
- The single-phase or three-phase earthed connection must be made on a basis appropriate to
the maximum current of the welding equipment.
- If the cable is connected to a fixed post, the earth, if provided, shall never be cut off by the
electric shock protection device.
- The welding power source switch, if provided, shall indicate "OFF".
Job position
The application of arc welding implies strict compliance with the safety conditions regarding electric
current (decree of 14.12.1988). It is necessary to ensure that no metallic part accessible to welders can
come into direct or indirect contact with a conductor of the power supply network. If there is any doubt
about this serious risk, a conductor of this metallic part shall be connected to earth with an electrical
cross-section at least equivalent to that of the largest phase conductor.
It is also necessary to ensure that a conductor connects any metallic part which the welder could
touch on an uninsulated part of the body (head, ungloved hand, bare arm, etc.) to earth of an electrical
cross-section at least equivalent to that of the largest power cable of the earth clamp or welding
torch. If several metal grounds are used, they shall be connected at one point, earthed under the same
conditions.
Welding and arc cutting shall be prohibited, except in very special cases in which stringent measures
shall be applied, in narrow conductive enclosures in which welding apparatus must be left outside.
Very serious safety measures shall be compulsory a priori for welding in poorly ventilated or damp
enclosures.
Risk of fire or explosion
Welding may involve risks of fire or explosion. Some precautions must be observed:
- Remove all explosive or flammable products from the welding area;
- Check that there is a sufficient number of fire extinguishers in the vicinity of the welding area;
- Check that the sparks projected cannot cause a fire, remembering that these sparks can
reignite several hours after the end of welding.
2.3. Individual protection
Risks of external injury
Electric arcs produce very bright infrared light and ultraviolet rays. These rays will damage your eyes
and burn your skin if not properly protected.
- The welder must be equipped and protected according to the difficulties of the work.
- They must be covered in such a way that no part of the welder's body can come into contact with
metal parts of the welding equipment, and also those which could come into contact with the
voltage of the mains supply.