IEC 62040-5-3:20 16确立了适用于移动式、固定式和固定式电子直流不间断电源系统（DC UPS）的性能和测试要求 -由不超过1000V的AC电压源供电， -输送不超过1500V的DC输出电压， -结合能量存储装置，以及 -具有主要功能以确保向负载提供DC电力的连续性。 本文件规定了完整DC UPS的性能和测试要求，而不是单个DC UPS功能单元的性能和测试要求。

IEC 62040-5-3:2016 establishes the performance and test requirements applied to movable, stationary and fixed electronic DC uninterruptible power systems (DC UPS) that
- are supplied from an AC voltage source not exceeding 1 000 V,
- deliver a DC output voltage not exceeding 1 500 V,
- incorporate an energy storage device, and
- have a primary function to ensure continuity of DC power to loads. This document specifies performance and test requirements of a complete DC UPS and not of individual DC UPS functional units.