IS 6.1
- 5
GB
GB
DEFINITIONS USED
The terms used are currenttechnicalterms,and where considered necessarythe meaningis described
below
- Generator
An assembly of an internal combustion piston engine and an alternate current, synchronous, 2-4 pole, self-
excited generator, joined together to create a station for self-productionof electrical energy.
- User system
Composed of the power supply circuits of the user equipment, including the relevant sectioning, handling,
breaking, transformation, protection, etc. devices which do not form part of the production, transmission and
distributionsystems.
- Category 1 electrical system
A system where the rated voltage is greater than 50 V and smaller than 1000 V including alternate current.
- Load
A set of numerical values of electrical and mechanical magnitudes which characterise the requirements
imposed on a rotary machine by an electrical circuit or by a mechanical device at a certain instant.
- Thermal switch
Main cut-out and breaking device made up of a switch which opens automatically by thermal effect.
- Differential switch
Main cut-out and breaking device made up of a switch which opens automatically by differential effect.
- Skilled person
A person with technical know-how or sufficient experience to allow him to avoid the dangers inherent in
electricity.
- specialisedpersonnel
A person able to evaluate the jobassigned to himand recognise the possible dangers on the basis of training
atthetrainingcentres,withprofessionalexperienceandknowledgeoftheequipmentinquestionandofthepossible
dangers deriving inthe event of negligent behaviour.
- Supplier
A body (e.g. manufacturer, agent, installer) which supplies the equipment or services relating to the machine.
- Control
Control action by which an output variable of the controlled system(controlled variable) is affectedby an input
variable of the controlling system in order to achieve a certain goal.
- Manual control
Control where the change of a variable handled is produced by a person through manual intervention.
- Automaticcontrol
Controlwherethe changeofavariablehandledisproducedbya controllingdevice (automatic controller)without
the interventionof a person.
- Danger
Source of possible harm or damage to health.
- Protection
Guard or protection device as safety measure to protect persons froma present or potential danger.
- Casing
Part intendedto assure protection ofthe equipment against specific outside influences andprotectionin every
sense against contacts.
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