本推荐规程为固定直流电源系统的设计提供了指南。组件 本推荐规程涉及的固定直流电源系统包括: -蓄电池 -静态电池充电器/整流器（包括尺寸） -配电设备 -防护设备 -控制设备 -互连 -仪器仪表 还提供了选择设备数量、类型和额定值的指南。 根据对整个系统设计的影响，讨论了每个不同部件的考虑因素，以及负载电压和其他负载特性的问题。 还提供了短路计算指南和不同直流电力系统组件的贡献，以提高装置的可靠性、性能和安全性。

This recommended practice provides guidance for the design of stationary dc power systems. The components of the stationary dc power system addressed by this recommended practice include the following: - Storage batteries - Static battery chargers/rectifiers (including sizing) - Distribution equipment - Protection equipment - Control equipment - Interconnections - Instrumentation Guidance for selecting the quantity, types, and ratings of equipment is also provided. The considerations of each of these different components and the issue of load voltage and other load specifics are discussed in terms of their effect on the design of the whole system. Guidance on short-circuit calculation and contribution of different dc power system components is also offered to improve reliability, performance, and safety of the installation.