INSTALLATION
5-3
5.2.1 User’s Responsibility
The user is responsible for installing and using the welding equipment according to the
manufacturer’s instructions. If electromagnetic disturbances are detected, then it shall be the
responsibility of the user of the welding equipment to resolve the situation with the technical
assistance of the manufacturer. This remedial action may be as simple as earthing the welding
circuit. In other cases, it could involve constructing an electromagnetic screen enclosing the
Welding Power Source and the work, complete with associated input filters. In all cases,
electromagnetic disturbances shall be reduced to the point where they are no longer
Troublesome.
5.2.2 Assessment of Area
Before installing welding equipment, the user shall assess potential electromagnetic problems
in the surrounding area. The following shall be considered:
(1) Other supply cables, control cables, signaling and telephone cables; above,
below and adjacent to the welding equipment.
(2) Radio and television transmitters and receivers.
(3) Computer and other control equipment.
(4) Safety critical equipment, e.g. guarding of industrial equipment.
(5) The health of people around, e.g. the use of pace-makers and hearing aids.
(6) Equipment used for calibration and measurement.
(7) The time of day that welding or other activities are to be carried out.
(8) The immunity of other equipment in the environment: the user shall ensure
that other equipment being used in the environment is compatible: this may
require additional protection measures.
(9) 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.
Interference may be transmitted by a high frequency initiated or stabilized arc welding machine
in the following ways:
WARNING
The importance of correct installation of high frequency welding equipment cannot be
overemphasized. Interference due to high frequency initiated or stabilized arc is almost
invariably traced to improper installation. A duly authorized person such as a properly licensed
electrician should perform the installation to avoid injury, death, or any equipment damage.
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