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APPENDIX E.- GLOSSARY
Item
System, sub-system, installation, plant, machine, equipment, structure, building,
assembly, component or part that may be considered individually and that may be
separately subjected to a revision or test.
Leakage Current
Current passing through the insulation. This is low in value.
LED
Light-Emitting Diode. This is a diode which, when polarised, emits a light of a given
wavelength.
Machine
Complex unit of a higher order made up of assemblies, components and parts,
grouped to form a functional system. Equivalent to the term equipment.
Magnetic packet
This is one of the elements formed by the electromagnetic coupling that transforms
electrical energy into magnetic energy, for this to be transformed in turn into
mechanical energy, (rotating machines) or again into electricity (transformers).
Maintenance
Set of technical and administrative activities aimed at conserving or restoring an
Item under/to conditions allowing it to perform its function.
Maintenance policy
Strategy governing the management decisions of a maintenance organisation.
Mass
The point of reference of an electrical circuit.
Modification
Partial design change of an Item.
Non-destructive test
Test performed on a machine and applying a lower voltage than the maximum
recommended.
Part
Parts constituting a component (gaskets, bolts).
Partial discharges
Disruptive electrical discharges short-circuiting the insulation between conductors
only partially, as regards both time and electrical section.
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