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Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
7) SAFETY DEVICES
Safety devices such as interlocks and circuit breakers should not be
disconnected or shunted out. Before installation, inspection, or service of
equipment, shut OFF all power and remove line fuses (or lock or red-tag
switches) to prevent accidental turning ON of power. Do not open power
circuit or change polarity while welding. If, in an emergency, it must be
disconnected, guard against shock burns or flash from switch arcing. Always
shut OFF and disconnect all power to equipment. A power disconnect switch
must be available near the welding power source.
ELECTROMAGNETIC INTERFERENCE (EMC)
Whilst this unit complies with EMC regulations, the user is responsible for
installing and using the welding equipment according to the manufacturers
instructions. If electromagnetic disturbances are detected then it shall be the
responsibility of the user of the welding equipment to resolve the situation. In
some cases this remedial action may be as simple as earthing the welding
circuit, see ‘Note’. In other cases it could involve constructing an
electromagnetic screen enclosing the power source and the work complete
with associated input filters. In all cases electromagnetic disturbances must be
reduced to the point where they are no longer troublesome.
NOTE:
The welding circuit may or may not be earthed for safety reasons.
Changing the earthing arrangements should only be authorised
by a person who is competent to assess whether the changes will
increase the risk of injury, e.g. by allowing parallel welding current
return paths which may damage the earth circuits of other
equipment.
ASSESSMENT OF THE AREA
Before installing welding equipment the user shall make an assessment of
potential electromagnetic problems in the surrounding area. Avoid using your
inverter in the vicinity of:
•
other supply cables, control cables, signalling and telephone cables;
above, below and adjacent to the welding equipment;
•
radio and television transmitters and receivers;
•
computer and other control equipment;
•
safety critical equipment, e.g. guarding of industrial equipment;
•
pacemakers and hearing aids etc;
•
equipment used for calibration or measurement;
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