Prevention Against Electric Shocks; Prevention Against Uv Rays, Fumes And Fires - INE SKYLINE HFP3000 Manual De Instrucciones

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5

Prevention against electric shocks

The machine must be installed by
authorised persons with specific technical
and professional know-how, conforming to
the laws in force in the country where it is
installed.
Before connecting the power source to the mains,
always check that:
•
the voltage received falls within ±10% allowance of
the nominal value displayed on the machine plate;
•
the mains input is properly grounded (as provided in
the relevant legislation) and the yellow/green wire of
the welding machine is connected to the ground;
•
the mains supply is equipped with a grounded
neutral conductor;
•
the power source is in a dry and ventilated place.
When using the welding machine, make sure that the
following precautionary measures are taken in the
workplace:
•
ensure that no metallic body may accidentally get
into contact with the power cables;
•
do not carry out any welding operation in damp or
wet areas;
•
ground any metallic parts falling within the operator's
reach;
•
keep all flammable materials away from the working·
area;
•
ensure that the gas cylinder is secured so as not to
hit or be hit by or anyway come into contact with the
welding circuit;
•
connect the work return lead of the welding circuit to
a place as close as possible to the welding area in
order to minimise the current path and the relevant
risks;
Make sure that welding torches
and cables are in perfect condition.
Furthermore, the operator should stick to the following
behavioural rules:
•
do not connect welding machines in series or
parallel;
•
in the case two or more welders should operate on
electrically connected parts, it is suggested that they
work at a suitable distance from each other and that
none of them touches two torches or electrode
holders at the same time;
•
do not place the torch or electrode holder on metallic
surfaces: this might be a condition for the machine to
be started accidentally;
•
always wear insulating garments.
6 Prevention against UV rays, fumes
and fires
Arc welding is a welding process by which
UV rays are emitted. Therefore the operators
must protect their eyes and face by wearing
the special masks provided with glasses
having an adequate protection degree.
Here below is a list of the recommended DIN
degrees or classes for the various procedures in
relation with the electric currents supplied.
MMA welding:
•
grade 10 - up to 80 Amps
•
grade 11 - from 80 to 180 Amps
•
grade 12 - from 180 to 300 Amps
•
grade 13 - from 300 to 480 Amps
•
grade 14 - above 480 Amps
MIG/MAG welding:
•
grade 10 - up to 80 Amps
•
grade 11 - from 80 to 120 Amps
•
grade 12 - from 120 to 180 Amps
•
grade 13 - from 180 to 300 Amps
•
grade 14 - from 300 to 450 Amps
•
grade 15 - above 450 Amps
TIG welding:
•
grade 10 - up to 40 Amps
•
grade 11 - from 40 to 100 Amps
•
grade 12 - from 100 to 180 Amps
•
grade 13 - from 180 to 250 Amps
•
grade 14 - from 250 to 400 Amps
•
grade 15 - above 400 Amps
Operators should wear gauntlets, insulating shoes and
fireproof clothes to protect themselves from radiation,
slags and sparks.
Reflection and transmission of UV rays in workplaces
should be reduced by using antiflash welding screens
or panels.
In order to reduce the toxic action of welding
fumes, it is suggested to operate in
ventilated areas. Use fume extractors close
to the welding area, if ventilation is poor or
lacking.
If the piece to be welded is covered by chemicals
(solvents, paints, etc.), it should be carefully cleaned
prior to welding to prevent toxic gas emission.
Page 19
It is strictly forbidden to weld on
fuel tanks, whether they are full or
empty.
Fire and/or explosion hazard!