5.4 Connection of the plasma cutting equipment
Connect the REHM cutting current source to the power mains in accordance with
the current provisions of VDE (Association of German Electrical Engineers) and
also observe the regulations of the appropriate safety authorities.
REHM cutting equipment is fitted with a Euro CEE plug for 3x400V three-phase
alternating current. When connecting the unit, observe the information regarding
the supply voltage and fuse protection. Automatic circuit breakers and fuses must
always be rated for the current indicated. You will find the necessary details in
Chapter 12, Technical Data.
Always switch off the equipment when it is not in use.
Where shielding gas cylinders are used, set these up separately and secure them
against falling over. Screw the cylinder pressure regulator onto the cylinder thread
and check the connection for tightness. Always close the cylinder valve after
working. Observe the appropriate regulations of the competent safety authorities.
5.5 Cooling of the plasma cutting equipment
Set up the REHM plasma cutting equipment so that there are no obstructions of
the air intake and air outlet. The stated duty cycle of the power components can
only be achieved if there is adequate ventilation (see “Technical Data”). Ensure
that no grindings, dust, metal parts or other foreign matter can get into the
equipment.
5.6 Compressed air supply
The rapid plug-and-socket connection for the compressed air supply is located on
the back of the equipment. The pressure must be at least 7 bar to ensure that the
cutting equipment has a sufficient supply.
The compressed air line must be adequately dimensioned. Where compressed
air lines are relatively long, the next higher cross-section should be chosen.
The compressed air provided must be clean, dry and oil-free. If the compressed
air is significantly contaminated, the unit should also be fitted with a fine mesh
microfilter (see REHM catalogue of accessories).
5.7 Guidelines for working with cutting current
sources
Only skilled workers or operators who have received appropriate instruction in the
equipment and procedures should be entrusted with cutting work. Always wear
protective clothing during cutting work and make sure that no one else who is
close by is exposed to any hazard. Following completion of the cutting work, you
should leave the equipment switched on for a few more minutes to allow the fan
to continue to run and the heat in the unit to be dissipated.
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