Safety Precautions; Requirement; Testing Lorch Machines According To Iec 60974-4 - LORCH S-Pulse Service Manual

2

Safety precautions

2.1

Requirement

Use and maintenance of welding and cutting machines can be dangerous. Please draw user´s attention to
follow the safety precautions to avoid injuries. Welding and cutting machines must be used appropriately
and only by qualified/trained staff. Please follow safetyregulations and use safety precautions in order to
prevent accident when working with these machines.
Only qualified workers who are knowledgeabel and have been trained to work safely with test instruments
and equipment on energized circuits shall be permitted to perform testing work on electrical circuits or
equipment were there is danger of injury from accidental contact with energized parts or improper use of
the test instruments and equipment.
Use only original spare parts
Replace any components that are not in perfect condition immediately.
Carry out the safety inspection after every repair or hardware change of the machine.
Norms
IEC 60974-4 In-service inspection and testing
2.2

Testing Lorch machines according to IEC 60974-4

– it is not necessary to disconnect any components of the power unit for the test
– it is recommended to disconnect the torch at water cooled machines
– the machine has to be cleaned properly before the test
– switch to MMA mode (stick electrode) if possible
– the test of the protective earth monitoring circuit is not demanded by the norm, because all safety
related elements of the machine are fully covered by the necessary normative measurements
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Safety precautions
02.20