低压辅助电源系统 第2-1部分：设计准则 通用要求

[中文适用范围]： IEC TS 63346-2-1:2026规定了标称电压等于或低于1 kV交流电、1.5 kV直流电，且标称频率不超过60 Hz的低电压辅助电力系统（APS）的设计通用原则，旨在确保系统在预定用途下的安全与正确运行。本文件适用于以下场景的低电压辅助系统设计：变电站（作为电力系统的一部分，限于特定区域，主要包括输电或配电线路的末端、电气开关设备和控制设备、建筑物及变压器）、换流站、水电站（利用水的重力势能转化为电能）以及火电站（通过燃烧化石燃料获取热能）。 [外文原描述]： IEC TS 63346-2-1:2026 establishes the general principles for the design of low-voltage auxiliary power systems (APS) with nominal voltages below or equal to 1 kV AC and 1,5 kV DC, and nominal frequency up to and including 60 Hz, so as to provide safe and correct operation for the intended use. This document applies to the design of low-voltage auxiliary systems for - substations, which are part of an electrical system, confined to a given area, mainly including ends of transmission or distribution lines, electrical switchgear and controlgear, buildings and transformers, - converter stations, - hydropower stations, where the gravitational energy of water is converted into electricity, and - thermal power stations, where the thermal energy is obtained by burning fossil fuels.