Lincoln Electric FlexCut 125, Руководство оператора, Страница: 6 / 62

SAFETY
General Precautions
Whereas plasma cutting has been used safely for years, it does
require certain precautions to ensure the safety of the operator and
other people around the equipment. The following safety information
must be provided to each person who will operate, observe, perform
maintenance, or work in close proximity to this piece of equipment.
Installation, operation, and repairs made to the system should only be
performed by qualified personnel. The system makes use of both A.C.
and D.C. circuitry for operation. Fatal shock hazard does exist.
Exercise extreme caution while working on the system. Safety decals
On the power supply should not be removed.
ULTRAVIOLET RADIATION
PROTECTION
Plasma cutting produces ultraviolet radiation similar to a welding arc.
This ultraviolet radiation can cause skin and eye burns. For this
reason, it is essential that proper protection be worn. The eyes are
best protected by using safety glasses or a welding helmet with an
AWS No. 12 shade or ISO 4850 No. 13 shade, which provides
protection up to 400 amperes. All exposed skin areas should be
covered with flame-retardant clothing. The cutting area should also
be prepared in such a way that ultraviolet light does not reflect. Walls
and other surfaces should be painted with dark colors to reduce
reflected light. Protective screens or curtains should be installed to
protect additional workers in the area from ultraviolet radiation.
NOISE PROTECTION
The system generates high noise levels while cutting. Depending on
the size of the cutting area, distance from the cutting torch, and arc
current cutting level, acceptable noise levels may be exceeded.
Proper ear protection should be used as defined by local or national
codes.
TOXIC FUME PREVENTION
Care should be taken to ensure adequate ventilation in the cutting
area. Some materials give off toxic fumes that can be harmful or fatal
to people in the vicinity of the cutting area. Also, some solvents
decompose and form harmful gases when exposed to ultraviolet
radiation. These solvents should be removed from the area prior to
cutting. Galvanized metal can produce harmful gases during the
cutting process. Ensure proper ventilation and use breathing
equipment when cutting these materials.
Certain metals coated with or containing lead, cadmium, zinc,
beryllium, and mercury produce harmful toxins. Do not cut these
metals unless all people subjected to the fumes wear proper air
breathing equipment.
ELECTRIC SHOCK PREVENTION
The system uses high open circuit voltages that can be
fatal. Extreme care should be used when operating or
performing maintenance on the system. Only qualified personnel
should service the system. Observe the following guidelines to protect
against electric shock:
• A wall-mounted disconnect switch should be installed and fused
according to local and national electrical codes. The disconnect
switch should be located as close as possible to the power supply
so it can be turned off in case of an emergency.
• The primary power cord should have a 600 volt minimum rating in
order to protect the operator. In addition, it should be sized
according to local and national electrical codes. Inspect the primary
power cord frequently. Never operate the system if the power cord
is damaged in any way.
• Make sure the primary power ground wire is connected at the input
power ground location on the power supply. Make sure the
connection is securely tightened.
• Make sure the positive output (work ground) of the power supply is
connected to a bare metal area on the cutting table. A driven
ground rod should be placed no further than five feet from this
connection. Make sure this ground point on the cutting table is
used as the star ground point for all other ground connections.
• Inspect the torch leads frequently. Never use the system if the leads
are damaged in any way.
• Do not stand in wet, damp areas when operating or performing
maintenance on the system.
• Wear insulated gloves and shoes while operating or performing
maintenance on the system.
• Make sure the system is switched off at the wall disconnect before
servicing the power supply or torch.
• Never change torch consumable parts unless main power to the
system is switched off at the power supply or wall disconnect.
• Do not attempt to remove any parts from beneath the torch when
cutting. Remember that the workpiece forms the current path back
to the power supply.
• Never bypass the safety interlock devices.
• Before removing any of the covers, switch the system off at the wall
disconnect. Wait at least five (5) minutes before removing any
cover. This will give the capacitors inside the unit time to discharge.
See Section 5 for additional safety precautions.
• Never operate the system without all of the covers in place. See
Section 5 for additional safety precautions.
• Preventive maintenance should be performed daily to avoid
possible safety hazards.
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FLEXCUT™ 125 SAFETY