序言这是C22的第二版。2第270号，电弧故障保护装置，CSA集团根据《加拿大电气规范》第二部分发布的一系列标准之一。它取代了2014年出版的前一版。本版本包括泄漏电流检测器断续器的附加要求、分支/馈线型AFCI参考文献的删除、更新的测试图、跳线连接设备的更新有限短路测试、修订的手指探针，以及整个版本中许多其他较小的更新。 电弧故障保护装置通常与其他装置结合使用。因此，本标准的用户需要参考CSA C22中的附加要求。2号5，CSA C22。2号144.1，CSA C22。2号21和CSA C22。2第42条（如适用）。有关《加拿大电气规范》第二部分标准的一般信息，请参见CAN/CSA-C22的前言。2第0号，一般要求——加拿大电气规范，第二部分。本标准适用于本标准规定范围内的合格评定。 范围1。1本标准适用于按照《加拿大电气规范》第一部分的规定安装的电弧故障保护装置。1.2这些装置包括电弧故障断路器（AFCI）和包含电弧故障电路保护的装置，用于单相120 V或单相两极三线120/240 V交流电，对于永久连接的设备，最大额定电流高达20 a的60 Hz电路。 1.3本标准还包括用于单相、120 V或单相、两极、三线制120/240 V交流电、60 Hz电源、高达30 A的软线连接设备。1.4本标准还适用于泄漏电流检测器断续器。1.5在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议； “可”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；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

PrefaceThis is the second edition of C22.2 No. 270, Arc fault protective devices, one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. It supersedes the previous edition published in 2014. This edition includes additional requirements for leakage current detector interrupters, deletion of references to branch/feeder type AFCIs, updated testing figures, an updated limited short circuit test for cord connected devices, a revised finger probe, and numerous other smaller updates throughout. Arc fault protective devices are usually embodied in combination with another device. As such, the user of this Standard will need to reference additional requirements as found in CSA C22.2 No. 5, CSA C22.2 No. 144.1, CSA C22.2 No. 21, and CSA C22.2 No. 42 as applicable. For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CAN/CSA-C22.2 No. 0, General Requirements - Canadian Electrical Code, Part II. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.Scope1.1 This Standard applies to arc fault protective devices designed to be installed in accordance with the Rules of the Canadian Electrical Code, Part I. 1.2 These devices include arc fault circuit interrupters (AFCI) and devices that incorporate arc fault circuit protection for use on single phase, 120 V, or single phase, two-pole, three-wire 120/240 V alternating current, 60 Hz circuits having a maximum current rating of up to 20 A for permanently connected devices. 1.3 This Standard also includes cord-connected devices for use on single phase, 120 V, or single phase, two- pole, three-wire 120/240 V alternating current, 60 Hz supply up to 30 A. 1.4 This Standard additionally applies to leakage current detector interrupters. 1.5 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.