本指南描述了评估和测试节能设备（ESD）电气性能的方法。它描述了一些测量方法，这些方法侧重于在ESD未连接到电路以及ESD已连接并通电到电路的情况下，监测观察到的负载或发电机消耗或产生的功率。详细的协议逐步描述了测试电路、评估仪器的类型和精度，以及测试测量的顺序。特别强调由于仪器连接不正确、仪器不足或结果解释不正确而导致的测量误差来源。 附录B包含实际例子，并解释了可能导致错误的现象的物理机制。本指南适用于任何电气连接的ESD控制电源输送的电力并为电力负载供电。虽然可能会委托一家独立的认证测试实验室进行ESD测试，但本标准的目的是为希望获得准确客观数据以帮助评估ESD性能的ESD相关人员提供指导。

This guide describes methods to evaluate and test the electrical performance of energy saving devices (ESDs). It describes measurement methods that focus on monitoring the power consumed or generated by the observed load or generator without the ESD connected into the circuit and with the ESD connected and energized into the circuit. Detailed protocols describe step-by-step the testing circuits, the type and accuracy of evaluation instrumentation, and the order of the test measurements. Special emphasis is given to sources of measurement errors due to incorrect connection of instrumentation, inadequate instrumentation, or incorrect interpretation of results. Annex B contains practical examples and explains the physical mechanisms of phenomena that may cause errors. This guide applies to any electrically connected ESD controlling electrical power delivered from a source and powering an electrical load. While an independent, certified testing laboratory might be contracted to perform ESD testing, the intent of this standard is to provide guidance to those involved with ESDs wishing to obtain accurate and objective data to aid in evaluating ESD performance.