GYS CARMIG Manual De Instrucciones página 15

Translation of the original instructions
ELECTROMAGNETIC INTERFERENCES
The electric currents flowing through a conductor cause electrical and magnetic fields (EMF).
All welders should use the following guidelines to minimize exposure to electromagnetic fields from
the welding circuit
- Regroup the electrode cables and earth clamp. If possible, attach them with tape
- Do not roll the electrode cable, torch or the earth clamp around the body.
- Do not stand between the cables. If the electrode cable or torch is on the right, the work cable should also be on the
right.
- Connect the earth cable to the workpiece, as close as possible to the welding area.
- Do not work next to the welding power source.
People wearing pacemakers are advised to consult their doctor before using this device.
Exposure to electromagnetic fields while welding may have other health effects which are not yet
known.
RECOMMENDATIONS TO ASSESS THE WELDING AREA AND WELDING INSTALLATION
Overview
The user is responsible for both the installation and use of the arc welding apparatus in accordance with the manufacturer's
instructions. If electromagnetic disturbances are detected, it is the user's responsability 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 fitting input filters. 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. TV and radio receivers/transmitters ;
c. Computers and other control equipments ;
d. Essential safety equipment such as security controls for industrial equipment;
e. the health of people who are near the device, such as people who wear a pacemaker, a hearing aid, etc ...;
f. Equipment used to calibrate and measure ;
g. The resistance of the other devices installed in the area of use of the device. 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 considered area can be larger than the limits fixed 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 specified in Article 10 of
CISPR 11: 2009. In situ measurements can also be used to confirm 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 filtering 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 modified
in any way, except for the changes and settings outlined in the manufacturer's instructions. The spark gap of the arc
CARMIG EN
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