1. Subject area
Public distribution networks are located between :
source substations, which receive energy at high voltage above 50 kV (high voltage level B or HTB), transform it and send it to high voltage, between 1 kV and 50 kV (high voltage level A or HTA);
private delivery points with HTA/BTA substations, for a company, or low-voltage connections, between 50 and 500 V (low-voltage level A or BTA), for a private individual who receives energy on his connection.
the abbreviations used correspond to the voltage ranges defined in the UTE C 18-510 publication of November 1988, approved by the interministerial decree of January 17, 1989. In particular, they no longer refer to "medium voltage (MV)", but to "high voltage level A (HTA)"....
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Choosing a neutral system
References
In Techniques de l'Ingénieur Traité Génie électrique
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