1 Scope
This part of IEC 62271
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 16 2/3 Hz up to and including 60
Hz. This document is also applicable to single-pole switches used on three-phase systems.
This document
is also applicable to the operating devices of these switches and to their auxiliary
equipment.
For switch-disconnectors, refer also to IEC 62271‑102 for their disconnecting function.
Devices not covered by this document are:
-
– devices that require a dependent manual operation;
-
– earthing switches. Earthing switches forming an integral part of a switch are covered by IEC 62271‑102;
-
– switching devices attached as an element of a high-voltage fuse assembly or its mounting
and operated by opening and closing the fuse assembly.
General principles and provisions of this document can also be applicable to single
pole switches intended for application in single-phase systems, the requirements for
dielectric tests and making and breaking tests being in accordance with the requirements
of the specific application.
This document
establishes requirements for general, limited and special purpose switches used in
distribution systems.
NOTE Except where special clarification is required, the term "switch" is used to refer to all kinds of switches and switch-disconnectors within the scope of this document.