本SAE航空航天标准规定了270 V直流电在使用设备接口处的特性和使用，以及对使用设备的限制。这些特性应适用于机载和地面支持电源系统。本标准还定义了相关的分布和安装注意事项。未经采购活动批准，为特定飞机应用设计的使用设备不得偏离这些要求。本标准旨在确保飞机电气系统或地面支持电气系统与机载使用设备之间的兼容性。

This SAE Aerospace Standard establishes the characteristics and utilization of 270 V DC electric power at the utilization equipment interface and the constraints on the utilization equipment. These characteristics shall be applicable for both airborne and ground support power systems. This standard also defines the related distribution and installation considerations. Utilization equipment designed for a specific aircraft application may not deviate from these requirements without the approval of the procuring activity.The purpose of this standard is to assure compatibility between aircraft electrical systems or ground support electric systems and airborne utilization equipment.