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.

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