3. Choice of protective devices according to the earth connection diagram
3.1 Determining the earth connection diagram
The grounding diagram depends mainly on the configuration of the site.
IT islands can be created by installing LV/LV transformers, as in the case of medical premises (operating theatres).
SCROLL TO TOP3.1.1 Site with HV/LV transformer
The interconnection of earth connections and all building grounds means that either a TN or an IT diagram is used. Downstream of a public distribution transformer, only the TN diagram is authorized.
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Choice of protective devices according to the earth connection diagram
Low-voltage mobile equipment
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