WEG W22 Premium E3 Manual De Instalación, Operación Y Mantenimiento página 71

[IEC 60050 IEV number 426-08-03]
Type of protection: set of specific measures applied to electrical apparatus to avoid ignition of a surrounding
explosive atmosphere by such apparatus.
[IEC 60050 IEV number 426-01-02]
Zones: hazardous areas are classified in terms of zones on the basis of the frequency and duration of the
occurrence of an explosive atmosphere.
Zone 0 (IEC) / Class I Div 1 (NEC): area in which an explosive gas atmosphere is present continuously, or for
long periods or frequently.
[IEC 60050 IEV number 426-03-03]
Zone 1 (IEC) / Class, I Div 1 (NEC): area in which an explosive gas atmosphere is likely to occur in normal
operation occasionally.
[IEC 60050 IEV number 426-03-04]
Zone 2 (IEC) / Class I, Div 2 (NEC): area in which an explosive gas atmosphere is not likely to occur in normal
operation, but if it does occur, will persist for a short period only.
[IEC 60050 IEV number 426-03-05]
Zone 20 (IEC) / Class II, Div 1 (NEC): area in which an explosive atmosphere in the form of a cloud of
combustible dust in air is present continuously, or for long periods or frequently.
[IEC 60050 IEV number 426-03-23]
Zone 21 (IEC) / Class II, Div 1 (NEC): area in which an explosive atmosphere in the form of a cloud of
combustible dust in air is likely to occur, occasionally, in normal operation.
[IEC 60050 IEV number 426-03-24]
Zone 22 (IEC) / Class II, Div 2 (NEC): area in which an explosive atmosphere in the form of a cloud of
combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short
period only.
[IEC 60050 IEV number 426-03-25]
Grounded Part: metallic part connected to the grounding system.
Live Part: Conductor or conductive part intended to be energized in normal operation, including a neutral
conductor.
Authorized personnel: employee who has formal approval of the company.
Qualified personnel: employee who meets the following conditions simultaneously:
receives training under the guidance and responsibility of a qualified and authorized professional;
g
works under the responsibility of a qualified and approved professional.
g
Note: The qualification is only valid for the company that trained the employee in the conditions set out by the authorized and qualified
professional responsible for training.
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Manual of Electric Motors 71