ESAB Fabricator 181i, Руководство по обслуживанию

Страница: 16 / 84

ESAB FABRICATOR 181i
SAFETY AND INSTALLATION 3-6 Manual 0-5449
The size of the surrounding area to be considered will depend on the structure of the building and other activities that are taking place.
The surrounding area may extend beyond the boundaries of the premises.
C. Methods of Reducing Electromagnetic Emissions
1. Mains Supply
Welding equipment should be connected to the mains supply according to the manufacturer’s recommendations. If interfer-
ence occurs, it may be necessary to take additional precautions such as filtering of the mains 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 its 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 weld-
ing 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 recommendation
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 Work Piece
Where the work piece is not bonded to earth for electrical safety, nor connected to earth because of its size and position, e.g.
ship’s hull or building steelwork, a connection bonding the work piece 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 work piece to earth should be made by direct connection
to the work piece, 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 interfer-
ence. Screening the entire welding installation may be considered for special applications.