Tweco 181i Thermal Arc Fabricator - Manual (Page 34)

Fabricator 181i
INSTALLATION, OPERATION AND SETUP 3-4 Manual 0-5191
C. Methods of Reducing Electromagnetic Emissions
1. Electricity Supply
Welding equipment should be connected to the
Electricity Supply according to the manufacturer’s
recommendations. If interference occurs, it may
be necessary to take additional precautions
such as filtering of the Electricity Supply.
Consideration should be given to shielding the
supply cable of permanently installed welding
equipment in metallic conduit or equivalent.
Shielding should be electrically continuous
throughout it’s length. The shielding should be
connected to the Welding Power Source so that
good electrical contact is maintained between
the conduit and the Welding Power Source
enclosure.
2. Maintenance of Welding Equipment
The welding equipment should be routinely
maintained according to the manufacturer’s
recommendations. All access and service doors
and covers should be closed and properly
fastened when the welding equipment is in
operation. The welding equipment should not be
modified in any way except for those changes
and adjustments covered in the manufacturer’s
instructions. In particular, the spark gaps of
arc striking and stabilizing devices should
be adjusted and maintained according to the
manufacturer’s recommendations.
3. Welding Cables
The welding cables should be kept as short
as possible and should be positioned close
together, running at or close to the floor level.
4. Equipotential Bonding
Bonding of all metallic components in the
welding installation and adjacent to it should
be considered. However. Metallic components
bonded to the work piece will increase the
risk that the operator could receive a shock
by touching the metallic components and the
electrode at the same time. The operator should
be insulated from all such bonded metallic
components.
5. Earthing of the Workpiece
Where the workpiece is not bonded to earth
for electrical safety, nor connected to earth
because of it’s size and position, e.g. ship’s hull
or building steelwork, a connection bonding
the workpiece to earth may reduce emissions
in some, but not all instances. Care should be
taken to prevent the earthing of the workpiece
increasing the risk of injury to users, or damage
to other electrical equipment. Where necessary,
the connection of the workpiece to earth should
be made by direct connection to the workpiece,
but in some countries where direct connection is
not permitted, the bonding should be achieved
by suitable capacitance, selected according to
national regulations.
6. Screening and Shielding
Selective screening and shielding of other cables
and equipment in the surrounding area may
alleviate problems of interference. Screening the
entire welding installation may be considered for
special applications.
3.06 Victor Regulator
Pressure regulator (Figure 3-1) attached to the cylinder valve reduce high cylinder pressures to suitable low working
pressures for welding, cutting, and other applications.
LOW PRESSURE
GAUGE (DELIVERY)
HIGH PRESSURE
GAUGE (SUPPLY)
INLET
CONNECTION
OUTLET
CONNECTION
PRESSURE
ADJUSTING
SCREW
A-09414_AB
Figure 3-1: Victor CS Regulator