DIN EN 62271-212:2017-09

This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage/low-voltage distribution substation, duly interconnected, for alternating current of rated operating voltages above 1 kV and up to and including 52 kV on the high voltage side, service frequency 50 Hz or 60 Hz. This assembly is to be cable-connected to the network, and intended for installation within an indoor or outdoor closed electrical operating area. A Compact Equipment Assembly for Distribution Substation (CEADS) as defined in this document is designed and tested to be a single product with a single serial number and one set of documentation. The functions of a CEADS are: - switching and control for the operation of the high-voltage circuit(s); - protection of the high-voltage/low-voltage transformer functional unit; - high-voltage/low-voltage transformation; - switching and control for the operation and protection of the low-voltage feeders. However relevant provisions of this document are also applicable to designs where not all of these functions exist (for example, equipment comprising only high-voltage/low-voltage transformation and switching and control for the operation and protection of the low-voltage feeder functions or equipment without switching and control for the operation of the high-voltage circuit(s)). In this document, a self-protected transformer is not considered as a CEADS, but as a functional unit designed and type-tested according to its own product standard EN 60076-13:2006. The standard differs from DIN EN 50532 (VDE 0670-699):2011-01 as follows: EN 50321 has been editorially revised and included in the IEC 62271 series. The responsible committee is DKE/UK 432.2 "Typgeprüfte Hochspannungs-Schaltanlagen" ("Type-tested controlgear") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.