虽然本设计指南适用于所有类型的发电站，但特别适用于要求电力服务系统连续运行的发电站。当辅助负荷的电力由电网供应时，服务系统从电网分接头终止的点开始，在车站服务母线或提供母线的变压器的端子处。 当辅助负载的服务来自独立发电机或通常不作为电网电源运行的蓄电池时，电站服务系统包括发电机和蓄电池。服务系统包括其服务的所有用电设备，如电机、电阻加热器、整流器等。 本指南包含典型电厂辅助负荷清单及其电力服务标准，以及典型电厂的单线图示例。它还包括典型电力服务参数表，以说明每个参数的典型值范围，并确定每个参数的最小值和最大值对负载的近似影响。每一条款（视情况而定）都有美国行业规范和标准以及其他参考文件的参考书目，这些参考文件为车站服务系统组件的设计和规范提供了详细指导。

While this design guide applies to all types of power generating stations, it is particularly applicable to stations in which the electric power service system is required to perform continuously. When electric power for auxiliary loads is supplied from the power grid, the service system begins at the point where the tap from the power grid terminates, either at a station service bus or at the terminals of the transformer that supplies the bus. When service to auxiliary loads is from independent generators or electric storage batteries that are not normally operated as power supplies to the power grid, the station service system includes the generators and storage batteries. The service system includes all of the electric power using devices it serves, such as motors, resistance heaters, rectifiers, etc. This guide contains a listing of typical power plant auxiliary loads and criteria for their power service and examples of single-line diagrams for a typical plant. It also includes tables of typical power service parameters to illustrate the range of typical values for each parameter, and it identifies the approximate effect of theminimum and maximum value of each parameter on the load. Each clause, as appropriate, has a bibliography of U.S. industry codes and standards and other reference documents that provide detailed guidance in the design and specification of station service system components.