前言这是CSA C381.1的第二版，外部交流直流和交流交流电源的能量性能。它取代了2008年出版的前一版，标题为“计算单电压外部交流直流和交流交流电源能效的测试方法”。本标准规定了测量外部交流直流和交流交流电源能量性能的要求、定义和测试方法。协调委员会打算将本标准与美国联邦法规第10篇第430部分B子部分附录Z协调，标题为“测量外部电源能耗的统一试验方法”。 CSA集团承认，该标准的制定部分是由加拿大自然资源部（NRCan）、BC Hydro、魁北克Hydro和安大略省能源部的财政支持实现的。范围1.1概述本标准规定了一种在全范围负载条件下计算外部电源（EP）能量性能的测试方法。它包括单电压和多电压外部交流直流和交流交流电源。注:外部电源设计用于将线电压ac转换为笔记本电脑、无绳电话和蜂窝电话、便携式立体声音响等通常需要的低压输出（ac或dc）。 EP包含在独立于其供电产品的外壳中。1.2目的本标准中规定的试验方法旨在补充CSA C381.2中包含的方法。本标准和CSA C381.2定义了两类用于能效测试的产品；CSA C381.2范围内的产品不适用于本标准的测试。附录B提供了确定用于测量产品能效的适当试验方法（本标准或CSA C381.2）的信息。1.3本标准不包括以下例外情况:a）直流-直流电压转换设备，如直流- 直流变换器不包括在本标准中，除非此类电路位于电源内。b） 加拿大医疗器械条例第1节中定义的“医疗器械”。c） 本标准不包括铭牌输出电压小于3 V、铭牌输出电流大于或等于1000 mA的直接操作交流直流外部电源，该电源为完全或主要由电机操作的产品的电池充电。d） 间接操作非A类外部电源。注:这些产品可能包含在CSA C381.2中。1.4本标准中的术语“应”用于表示要求，即。 e、 ，用户有义务满足的规定，以符合标准；“宜”用于表示建议或建议但不需要的建议；“may”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释旨在与文本中的解释性或信息性材料分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附录被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

PrefaceThis is the second edition of CSA C381.1, Energy performance of external ac-dc and ac-ac power supplies. It supersedes the previous edition published in 2008 under the title, Test method for calculating the energy efficiency of single-voltage external ac-dc and ac-ac power supplies. This Standard specifies requirements, definitions, and test methods for measuring the energy performance of external ac-dc and ac-ac power supplies. The Harmonization Committee intended that this Standard would harmonize with Appendix Z to Subpart B, Part 430 of Title 10 to the United States Code of Federal Regulations, entitled "Uniform Test Method for Measuring the Energy Consumption of External Power Supplies". CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada (NRCan), BC Hydro, Hydro-Quebec, and the Ontario Ministry of Energy.Scope1.1 General This Standard specifies a test method for calculating the energy performance of external power supplies (EPS) across a full range of load conditions. It covers single-voltage and multiple-voltage external ac-dc and ac-ac power supplies. Note: External power supplies are designed to convert line voltage ac into the low-voltage output (ac or dc) typically required by laptop computers, cordless and cellular phones, portable stereos, etc. EPS are contained in a separate housing from the product they are powering. 1.2 Purpose The test method specified in this Standard is intended to complement the methodology contained in CSA C381.2. This Standard and CSA C381.2 define two classifications of products for the purpose of energy-efficiency testing; products within the scope of CSA C381.2 are not intended to be tested by this Standard. Annex B provides information on determining the appropriate test method (this Standard or CSA C381.2) for measuring a product's energy efficiency. 1.3 Exclusions The following are not covered by this Standard: a) Dc-dc voltage conversion equipment, such as dc-dc converters, are not included in this Standard, except to the extent that such circuitry is found within a power supply. b) A "medical device" as defined in Section 1 of the Canadian Medical Devices Regulations. c) A direct operation, ac-dc external power supply with nameplate output voltage less than 3 V and nameplate output current greater than or equal to 1,000 mA that charges the battery of a product that is fully or primarily motor operated are not covered by this Standard. d) Indirect operation non-Class A external power supplies. Note: These products may be covered by CSA C381.2. 1.4 Terminology In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.