1.1 本指南涵盖了如何准备电力负荷分析（ELA），以满足联邦航空局（FAA）的要求。 1.2 本指南旨在解决飞机级电力负荷分析。本指南的制定未考虑电力推进功率负荷分析。 1.3 以国际单位制表示的数值应视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 为了证明符合14 CFR 23.1351，必须确定电气系统容量。 4.2 14 CFR 23.1351（a）（2）规定: 4.2.1 对于普通、公用和杂技类飞机，通过电力负荷分析或电力测量，说明以可能的组合和可能的持续时间应用于电力系统的电力负荷； 和 4.2.2 对于通勤类飞机，通过电力负荷分析，说明以可能的组合和可能的持续时间应用于电力系统的电力负荷。 4.3 电力负荷分析（ELA）的主要目的是确定提供最坏情况下电力负荷组合所需的电力系统容量（包括发电源、变流器、接触器、母线等）。这是通过评估所有适用飞行条件下的平均需求和最大需求来实现的。然后可以使用摘要将ELA与系统容量联系起来，并可以确定正常、异常和紧急情况下电源的充足性。 注1: ELA应在飞机的整个寿命期内保持，以记录电气系统的变化，这可能会增加或消除系统的电气负载。 4.4 用于飞机型号认证的ELA应作为任何后续变更的基线文件。如有可能，应遵循原始ELA的基本格式，以确保方法和方法的一致性。 4.5 原始ELA可能缺少某些信息，例如，应急电池的可用时间。可能有必要使用本指南中包含的指导材料更新ELA。

1.1 This guide covers how to prepare an electrical load analysis (ELA) to meet Federal Aviation Administration (FAA) requirements. 1.2 This guide is intended to address aircraft level electrical load analysis. Electric propulsive power load analysis was not considered in the development of this guide. 1.3 The values stated in SI units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 To show compliance with 14 CFR 23.1351, you must determine the electrical system capacity. 4.2 14 CFR 23.1351(a)(2) states that: 4.2.1 For normal, utility, and acrobatic category airplanes, by an electrical load analysis or by electrical measurements that account for the electrical loads applied to the electrical system in probable combinations and for probable durations; and 4.2.2 For commuter category airplanes, by an electrical load analysis that accounts for the electrical loads applied to the electrical system in probable combinations and for probable durations. 4.3 The primary purpose of the electrical load analysis (ELA) is to determine electrical system capacity (including generating sources, converters, contactors, bus bars, and so forth) needed to supply the worst-case combinations of electrical loads. This is achieved by evaluating the average demand and maximum demands under all applicable flight conditions. A summary can then be used to relate the ELA to the system capacity and can establish the adequacy of the power sources under normal, abnormal, and emergency conditions. Note 1: The ELA should be maintained throughout the life of the aircraft to record changes to the electrical system, which may add or remove electrical loads to the system. 4.4 The ELA that is produced for aircraft-type certification should be used as the baseline document for any subsequent changes. When possible, the basic format of the original ELA should be followed to ensure consistency in the methodology and approach. 4.5 The original ELA may be lacking in certain information, for instance, time available on emergency battery. It may be necessary to update the ELA using the guidance material contained in this guide.