CIGWELD WELDSKILL 180, Руководство по обслуживанию, Страница: 23 / 80

SERVICE MANUAL
180
SERVICE MANUAL
180
0-5461 3-3 INSTALLATION
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 be-
cause 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 work-
piece 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 connec-
tion 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.