![\"Les](\"https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Understanding-the-difference-between-voltage-levels.png\")
<\/figure>\n\n\n\n1. Low voltage (LV)<\/h2>\n\n\n\n
Voltage ranges:<\/strong><\/p>\n\n\n\n What is it for?<\/strong> These are the tensions of everyday life: our homes, offices, shops, and a good part of the industrial machinery work on LV. This is the field of wall sockets, lighting, classic electrical panels...<\/p>\n\n\n\n Safety and equipment<\/strong> The main risk in LV remains electrocution or fires caused by a short circuit. Insulation is relatively simple: plastic, rubber or standard insulation. Typical equipment includes LV\/LV transformers, flexible cables, household circuit breakers, switches, etc.<\/p>\n\n\n\n Voltage range: <\/strong>From more than 1,000 V to 50,000 V AC. Up to 75,000 V DC.<\/p>\n\n\n\n Uses:<\/strong> MV is used for the distribution of electricity on a larger scale: industrial areas, hospitals, train stations, shopping malls, and even the supply of entire neighborhoods. It is ideal for transporting energy with less loss than LV, but over reasonable distances.<\/p>\n\n\n\n Safety and insulation:<\/strong> Dangers increase sharply: electric arcs, serious burns, electrocution. Examples of equipment:<\/strong> Transformer substations, HVA cabinets, MV circuit breakers, etc.<\/p>\n\n\n\n Voltage Range<\/strong> :<\/p>\n\n\n\n What is it for?<\/strong> HV is the backbone of national networks. It allows electricity to be transported over very long distances, from power plants to consumption areas. Without HT, it is impossible to supply an entire country efficiently.<\/p>\n\n\n\n Safety and insulation:<\/strong> The risks are extreme: at these levels, an electric arc can occur even without direct contact. Access is strictly reserved for highly qualified specialists, equipped with very specific protections. The insulation is massive: long chains of ceramic or glass insulators, long distances in the air, special cables...<\/p>\n\n\n\n Examples of equipment: <\/strong>Overhead lines on pylons, high-voltage substations, etc.<\/p>\n\n\n\n\n
2. Medium Voltage (MV)<\/h2>\n\n\n\n
Access to MV facilities is strictly regulated and reserved for authorised persons.
The insulation becomes much more robust: shielded cables, ceramic insulators, vacuum or SF6 gas switchgear, etc.<\/p>\n\n\n\n3. High Voltage (HV)<\/h2>\n\n\n\n
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Feature<\/strong><\/td> Low Voltage (LV)<\/strong><\/td> Medium Voltage (MV)<\/strong><\/td> High Voltage (HV)<\/strong><\/td><\/tr> Voltage Range<\/td> < 1 kV<\/td> 1 kV to 50 kV<\/td> > 50 kV<\/td><\/tr> Usage<\/td> Domestic, tertiary, small industry<\/td> Urban distribution, heavy industry<\/td> Long-distance transport<\/td><\/tr> Risks<\/td> Electrocution, fire<\/td> Electric arcs, severe burns<\/td> Deadly danger even from a distance<\/td><\/tr> Security measures<\/td> Circuit breakers, differentials, installation standards<\/td> Strict procedures, authorisations<\/td> No access, experts only<\/td><\/tr> Insulation<\/td> Single<\/td> Reinforced<\/td> Very strong<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
![\"Demande](\"https:\/\/no-cache.hubspot.com\/cta\/default\/48243687\/interactive-185420320831.png\")
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