本推荐规程描述了如何提高应急和备用电力系统的可靠性。检查的一些因素包括应急或备用设备的具体应用、环境问题、设备的规格和验收测试，以及设备的操作和维护。

This recommended practice describes how to improve the reliability of emergency and stand by power systems. Some of the factors examined include the specific application of the emergency or stand by equipment, environmental concerns, specification and acceptance testing of the equipment, and the operations and maintenance of the equipment.