DIN EN 62271-103:2012-04

The standard is applicable to three-phase, alternating current switches and switch-disconnectors for their switching function, having making and breaking current ratings, for indoor and outdoor installations, for rated voltages above 1 kV up to and including 52 kV and for rated frequencies from 162/3 Hz up to and including 60 Hz. It is also applicable to single-pole switches used on three phase systems and to the operating devices of these switches and to their auxiliary equipment. Switch-disconnectors are also covered by IEC 62271-102 for their disconnecting function. Devices that require a dependent manual operation are not covered by this standard. General principles and provisions of this standard may also be applicable to single pole switches intended for application in single-phase systems. The requirements for dielectric tests and making and breaking tests shall be in accordance with the requirements specified in this standard. The standard establishes requirements for general, limited and special purpose switches used in distribution systems. It is assumed that opening and closing operations are performed according to the manufacturer's instructions. A making operation may immediately follow a breaking operation but a breaking operation should not immediately follow a making operation since the current to be broken may then exceed the rated breaking current of the switch. The following modifications have been made with respect to DIN EN 60265-1 (VDE 0670-301):1999-05: a) the rated voltage of 52 kV is now included; b) the document is aligned with IEC 62271-1 and IEC 62271-100; c) test procedures for short-circuit making tests have been added; d) introduction of the term NSDD (non-sustained disruptive discharge) as defined in EN 62271-1 and restrikes; e) new classes C1 and C2 for capacitive switching have been added; f) new Annex A defining tolerances has been supplemented. The responsible committee is Subcommittee UK 432.1 "Hochspannungs-Schaltgeräte" ("High-voltage switchgear") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.