This part of IEC 60265 is applicable to three-phase@ alternating current switches and switch-disconnectors having making and breaking current ratings@ for indoor and outdoor installations@ for rated voltages above 1 kV and less than 52 kV and for rated frequencies from 16 2/3 Hz up to and including 60 Hz.This standard is also applicable to the operating devices of these switches and to their auxiliary equipment.Switch-disconnectors are also covered by IEC 60129.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 should be in accordance with the requirements of the specific application.NOTE 1 - 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 standard.NOTE 2 - Earthing switches are not covered by this standard. Earthing switches forming an integral part of a switch are covered by IEC 60129.NOTE 3 - This standard is not applicable to switching devices attached as an accessory to a high-voltage fuse assembly or its mounting and operated by opening and closing the fuse assembly.?