This prestandard describes requirements for the maintenance of equipment and installations of electrical supply networks as well as general applicable procedures. It applies to operators of electrical supply networks especially public networks. Excluded are for the time being:
High voltage direct current (HVDC) power transmissions;
road lightning networks;
equipment for the end-users; installations for the generation of electrical energy.
Measurements of the crisis management, e. g. in the case of a castastrophe are not subject of this standard.
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