1. The need for protection
1.1 Role and composition of installations
Thanks to its ease of use, regulation and automation, electrical energy has become indispensable to everyday life.
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In domestic installations, offices and small commercial premises (e.g. shops), it mainly powers lighting, small motors, electronic and IT equipment, air conditioning (heating, refrigeration), elevators, etc. Total power requirements range from a few kilowatts in the domestic sector to several hundred kilowatts in the small commercial sector.
Distribution is carried out via tree-like networks of cables, almost exclusively at low voltage (LV: 230/400 V), single-phase or three-phase depending on the nature and power of the applications connected, and exceptionally...
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The need for protection
Eliminating dangerous operating conditions
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"Electricity networks and applications"
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Standardization
AFNOR Association Française de Normalisation.
IEC International Electrotechnical Commission.
UTE Union technique de l'Électricité.
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