CIGWELD WeldSkill 200AC/DC - Page 21

Manual 0-5206 3-5 Safety and Installation
SAFETY AND INSTALLATION WELDSKILL 200AC/DC INVERTER
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 interference 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weldingequipmentshouldnotbemodied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oor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 interference. Screening the entire welding installation may be considered for special applications.