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AUTOMATIC INSTALLATION FOR PLASMA AND OXY-ACETYLENE
CUTTING
1 - ELECTRICAL SECURITY
Before connecting up your equipment, you must
check that:
- The meter, the system for protection against over-
currents
compatible with its maximum power and its power
voltage (cf. instruction plates)
The use of cutting implies a strict respect of safety conditions with
-
regard to electrical currents.
It is necessary to check that no metal piece accessible to the
-
operators and to their assistants can come into direct or indirect
contact with a phase conductor and the neutral of the supply network.
Connect all the metal earths of the welding set that are within
-
reach of the user to a single point.
This point is grounded. All connections must be made with cables
-
whose section is at least equal to that of the largest phase cable.
Before carrying out any checks and repairs inside the machine, check
that the equipment has been separated from the electrical installation
by padlocked lock-out devices
The power supply plug has been removed. Provisions are taken
-
to prevent the accidental connection of the plug in a socket.
The accidental connection of the cable of a fixed installation is
-
made impossible.
Regularly check the insulation of equipment and electrical
accessories is in good condition. This concerns plugs, flexible cables,
sheaths, connectors, extension cords, workpiece clamps, electrode
holders or torches...
Maintenance and repair work on insulating sheaths and covers
should never be done in a makeshift manner
(Section VI, Art. 47 Décret 88-1056 du 14-11-88. ).
2 - PERSONAL PROTECTION
WHOLE BODY PROTECTION:
The operator is to be dressed and protected in
relation to the work which he is performing.
Precautions are to be taken that no part of the
body of the operators or their assistants can come
into contact with workpieces and metal parts which
might carry the network supply voltage.
Keep in place panels and safety guards.
The operator must wear individual insulating
protection at all times
This protection must be kept dry to prevent electric
shocks and must be kept oil-free to prevent fire
risk.
The protective equipment worn by the operator
and his assistants : gloves, aprons, and safety
shoes, provide additional protection against burns
from hot workpieces, spatter and slag.
Also check that these items of equipment are in good condition and
replace them before they no longer provide protection.
SAFETY
1.1- CONNECTION OF CUTTING POWER SOURCES TO MAINS
and
the
electrical
installation
1.2- WORK STATION
1.4 - MAINTENANCE
2.1 RISK OF EXTERNAL INJURY
- The single-phase or three-phase connection with earth can be
effected by way of a socket compatible with the plug of its connecting
cable.
- If the cable is connected to a fixed station, the earth, if it is provided,
are
is never to be cut by the protective system against electrical shocks.
- Its switch, if there is one, is turned to be "OFF" setting..
All the neighbouring metal supports (cutting tables, ground
-
connectors for positioners, turning rolls, etc.) designed to receive parts
liable to be cutted by a same power source should be connected
together by a cable with section sufficiently large enough for the
maximum cutting current return
1.3 - SERVICING
Cutout by way of a fixed connecting system is single pole (phases
-
and neutral). It is in the "OFF" position, and cannot be
accidentally put into operation.
Some items of equipment come with an HT.HF striking circuit (shown
by a plate). You should never work inside of the corresponding unit
Maintenance work on electrical equipment must be entrusted to
persons qualified to do such work.
As required have a specialist repair, or even better, replace
defective accessories.
Check periodically that electrical connections are properly tightened
and do not overheat.
In the Maintenance and Operating Manual, see the Section devoted to
the type of equipment supplied.
THE FACE AND EYES:
You must protect:
The welding mask, whether or not it forms part of the helmet, should
always be fitted with a protective filter, the category of which will
depend on the intensity of the welding arc current.
The coloured filter may be protected from impacts
and spatter by means of a transparent glass in front
of the mask.
When replacing the protective filter (tinted glass),
you should keep the same references (N° of opacity
gradation).
Those in the vicinity of the operator, and even more so, his assistants
must be protected by suitable screens, protective goggles against UV
light, and if required, by a mask equipped with a suitable protective
filter. (NF S771-4 A 1-5)
- The eyes against glare from molten metal and
flame. To do so, wear goggles with coloured glass.
The hair, face and eyes must be protected against
spatter during the welding operation and against the
slag spatter during the cooling of the solder.
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