高压开关 第1部分：额定电压高于 1 kV 且低于 52 kV 的高压开关（第 2.0 版；修正案 1-1984；勘误表 10/1986；勘误表 02/1990；修正案 2-1994）

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.