RECOMMENDATIONS TO ASSESS THE WELDING AREA AND WELDING INSTALLATION
Overview
The user is responsible for installing and using the arc welding equipment in accordance with the manufacturer’s instructions. If electromagnetic
disturbances are detected, it is the responsibility of the user of the arc welding equipment to resolve the situation with the manufacturer’s technical
assistance. In some cases, this remedial action may be as simple as earthing the welding circuit. In other cases, it may be necessary to construct an
electromagnetic shield around the welding power source and around the entire piece by tting input lters. In all cases, electromagnetic interferences
must be reduced until they are no longer bothersome.
Welding area assessment
Before installing the machine, the user must evaluate the possible electromagnetic problems that may arise in the area where the installation is
planned, in particular, it should consider the following:
a. Other cables, control cables, telephone cables: above, below and besides the device;
b. Radio/TV transmitters and receptors,
c. Computers and other control equipments,
d. Critical equipments for safety as safety commands of industrial equipments;
people health near the machine (people wearing cardiac pacemaker, auditive device etc...)
e. The health and safety of the people who are close to the machine, e.g. people who wear a pacemaker, a hearing aid, etc ...
f. Equipment used to calibrate and measure,
g. The immunity of the other equipments installed in the welding area or nead the welding machine. The user will have to make sure that the devices
in the same room are compatible with each other. This may require additional precautions,
h. The time of day during which the unit must operate;
The surface of the area to be considered around the device depends on the the building’s structure and other activities that take place there. The area
taken in consideration can be larger than the limits determined by the companies.
Welding area assessment
Besides the welding area, the assessment of the arc welding systems intallation itself can be used to identify and resolve cases of disturbances. The
assessment of emissions must include in situ measurements as specied in Article 10 of CISPR 11: 2009. In situ measurements can also be used to
conrm the effectiveness of mitigation measures.
RECOMMENDATION ON METHODS OF ELECTROMAGNETIC EMISSIONS REDUCTION
a. National power grid: the arc welding machine must be connected to the national power grid in accordance with the manufacturer’s
recommendation. If interferences occur, it may be necessary to take additional preventive measures such as the ltering of the power suplly network.
Consideration should be given to shielding the power supply cable in a metal conduit. It is necessary to ensure the shielding’s electrical continuity
along the cable’s entire length. The shielding should be connected to the welding current’s source to ensure good electrical contact between the
conduct and the casing of the welding current source.
b. Maintenance of the arc welding equipment: the arc welding machine should be be submitted to a routine maintenance check according to
the manufacturer’s recommendations. All accesses, service doors and covers should be closed and properly locked when the arc welding equipment
is on.. The arc welding equipment must not be modied in any way, except for the changes and settings outlined in the manufacturer’s instructions.
The spark gap of the arc start and arc stabilization devices must be adjusted and maintained according to the manufacturer’s recommendations.
c. Welding cables: cables must be as short as possible, close to each other and close to the ground, if not on the groud.
d. Electrical bonding: consideration shoud be given to bonding all metal objects in the surrounding area. However, metal objects connected to
the workpiece increase the riskof electric shock if the operator touches both these metal elements and the electrode. It is necessary to insulate the
operator from such metal objects.
e. Earthing of the welded part: When the part is not earthed because for electrical safety reasons or because of its size and its location (which
is the case with ship hulls or metallic building structures), the earthing of the part can, in some cases but not systematically, reduce emissions. It is
preferable to avoid the earthing of parts that could increase the risk of injury to the users or damage other electrical equipments. If necessary, it is
appropriate that the earthing of the part is done directly, but in some countries that do not allow such a direct connection, it is appropriate that the
connection is made with a capacitor selected according to national regulations.
f. Protection and plating: The selective protection and plating of other cables and devices in the area can reduce perturbation issues. The
protection of the entire welding area can be considered for specic situations.
TRANSPORT AND TRANSIT OF THE MACHINE
The machine is equipped with a handle to facilitate transport. Be careful not to underestimate the machine’s weight.
Do not use the cables or torch to move the machine. The welding equipment must be moved in an upright position.
Never lift the machine while there is a gas cylinder on the support shelf. Transportation standards are different.
Do not place/carry the unit over people or objects.
INSTALLATION
Rules to follow:
• Put the machine on the oor (maximum incline of 10°.)
• Ensure the work area has sufcient ventillation for welding, and that there is easy access to the control panel.
• The machine must be placed in a sheltered area away from rain or direct sunlight.
• The machine must not be used in an area with metal dusts.
• The machine protection level is IP23, which means :
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