GYS POT COMBI ARCPULL Manual De Instrucciones página 23

Operating manual
GUIDELINES FOR ASSESSING THE WELDING AREA AND FACILITY
General Information
The user is responsible for setting up and using the arc-welding equipment according to the manufacturer's instructions.
If electromagnetic interference is detected, it is the responsibility of the person using the arc-welding equipment to
resolve the situation together with the manufacturer's technical assistance. In some cases, this corrective action may be
as simple as earthing the welding circuit. In other cases, an electromagnetic shield may need to be constructed around
the source of the welding current and the entire workpiece along with fitting input filters. In each case, electromagnetic
interference should be reduced until it is no longer a concern.
Evaluating the welding area
Before setting up arc-welding equipment, the user should assess the surrounding area for potential electromagnetic
problems. The following should be taken into account:
(a) Whether other power, control, signal and/or telephone cables are located above, below or next to the arc-welding
equipment
(b) radio and television receivers and transmitters
(c) computers and other control equipment
(d) safety-critical equipment, e.g., to protect industrial equipment
(e) the health of nearby persons, e.g. those using pacemakers or hearing aids
(f) calibration or measurement equipment
(g) the immunity of other equipment in the vicinity
The user must ensure that other equipment used in the surrounding area is compatible. This may require additional
protective measures:
(h) the time of day when welding or other activities are carried out
The size of the surrounding area to be taken into account depends on the structure of the building and the other activi-
ties taking place there. The surrounding area may extend beyond the boundaries of the premises.
Evaluating the welding equipment
In addition to assessing the area, evaluating the arc-welding equipment can identify and resolve cases of interference.
The evaluation of emissions should include in situ measurements as specified in Article 10 of CISPR 11. In situ measu-
rements can also be used to confirm whether the mitigation measures taken are effective.
GUIDELINES FOR REDUCING ELECTROMAGNETIC RADIATION
a. Public power supply network: Arc-welding equipment should be connected to the public power supply network
according to the manufacturer's recommendations. If interference does occur, it may be necessary to take additional
preventive measures, such as filtering the public power supply. For permanently installed arc-welding equipment, consi-
der shielding the power cable in metal tube or something similar. It is important to ensure that the shielding is electrically
continuous along its entire length. The shielding should be connected to the source of welding current to ensure good
electrical contact between the tube and the source of the welding current's casing.
b. Maintaining arc-welding equipment: Arc-welding equipment should be subject to routine maintenance as re-
commended by the manufacturer. All access points, service doors and covers should be closed and properly locked
when the arc-welding equipment is in use. The arc-welding equipment should not be modified in any way, except for
the modifications and adjustments mentioned in the manufacturer's instructions. In particular, the ignition device's and
arc stabiliser's spark gap should be adjusted and maintained as recommended by the manufacturer.
c. Welding cables: Cables should be as short as possible and placed close together either near the ground or on the
ground.
d. Equipotential bonding: Consider linking together all the metal objects in the surrounding area. However, metal
objects connected to the workpiece increase the risk of the operator getting an electric shock if they touch both these
metal parts and the electrode at the same time. The operator should be isolated from such metal objects.
e. Earthing the workpiece: When the workpiece is not earthed for electrical safety reasons or because of its size and
location, for example on a ship's hulls or a building's structural steelwork, an earthed connection may reduce emissions
in some cases but not always. Care should be taken to avoid earthing parts which could increase the risk of injury to
users or damage other electrical equipment. If necessary, the workpiece's earth connection should be made directly but
in some countries, where this direct connection is not allowed, the connection should be made with a suitable capacitor
chosen according to national regulations.
f. Covering and shielding: Selectively covering and shielding other cables and equipment in the surrounding area
can limit interference problems. Shielding the entire welding area can be an option for special arc-welding applications.
Translation of the original
instructions
GYSPOT COMBI ARCPULL
23