This standard is applicable to three-phase, alternating current switches and switch-disconnectors for their swichting 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 standard is also applicable to single-pole switches used on three phase systems. This standard is also applicable to the operating devices of these switches and to their auxiliary equipment.
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