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SR EN 50522:2011

Earthing of power installations exceeding 1 kV a.c.

This European Standard is applicable to specify the requirements for the design and erection of earthing systems of electrical installations, in systems with nominal voltage above 1 kV a.c. and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended. For the purpose of interpreting this standard, an electrical power installation is considered to be one of the following: a) substation, including substation for railway power supply; b) electrical installations on mast, pole and tower; switchgear and/or transformers located outside a closed electrical operating area; c) one (or more) power station(s) located on a single site; the installation includes generators and transformers with all associated switchgear and all electrical auxiliary systems. Connections between generating stations located on different sites are excluded; d) the electrical system of a factory, industrial plant or other industrial, agricultural, commercial or public premises. The electrical power installation includes, among others, the following equip

Status : Withdrawn
Approval date : 11/30/2011
Withdrawal date : 1/10/2025
Number of pages : 70
ICS : 29.120.50 Fuses and other overcurrent protection device
Technical Committee : 158 - Short circuit currents

Relations with other standards: