BS EN 62271-202:2014 PDF

What is BS EN 62271 ‑ 202 ‒ High-voltage/low-voltage prefabricated substation about?

BS EN 62271 ‑ 202 is a part of an international multi-series standard that covers general specifications for high-voltage switchgear and control gear. BS EN 62271 ‑ 202 specifies the service conditions, rated characteristics, general structural requirements, and test methods of high voltage/low voltage or low voltage/high voltage prefabricated substations. These are cable-connected, that are to be operated from the inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the high voltage side. BS EN 62271 ‑ 202 also specifies prefabricated substations that include an operation for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation at locations with public accessibility and where protection of personnel is provided. Prefabricated substations can be situated at ground level or partially or completely below ground level. In general, a prefabricated substation comprises an enclosure containing the following electrical components: