前言:这是NCE、CSA集团和UL关于熔断器的协调标准——第19部分:光伏熔断器。它是NMX-J-009/248/19-ANCE的第一版，CAN/CSA-C22的第一版。2第248.19号和第一版UL 248-19。本协调标准已于2020年2月28日共同修订。为此，CSA集团和UL发布了日期为2020年2月28日的修订页，NCE发布了日期为2020年2月28日的新版。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。本标准已被美国国家标准协会（ANSI）批准为美国国家标准。 范围:1.1本部分适用于额定电压高达1500 Vdc的光伏（PV）系统的熔断器。1.2根据加拿大的《加拿大电气规范》（CSA C22.1《加拿大电气规范第一部分》）和《电气安装标准》（NOM-001-SEDE），光伏（PV）系统的用途旨在保护光伏串或阵列及其相关接线，以在标记的电气额定值内提供过载或短路保护，墨西哥和美国国家电气规范（NEC）NFPA-70。1.3这些类型的熔断器不用于保护下游逆变器组件，如电容器，以及防止此类电容器放电回阵列。

Preface:This is the harmonized ANCE, CSA Group, and UL Standard forFuses – Part 19: Photovoltaic Fuses. It is the first edition of NMX-J-009/248/19-ANCE, the first edition of CAN/CSA-C22.2 No 248.19, and the first edition of UL 248-19. This harmonized standard has been jointly revised on February 28, 2020. For this purpose, CSA Group and UL are issuing revision pages dated February 28, 2020, and ANCE is issuing a new edition dated February 28, 2020.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.Scope:1.1This Part applies to fuses for photovoltaic (PV) systems rated up to 1500 Vdc.1.2Fuses for photovoltaic (PV) systems are intended to be used for the protection of photovoltaic strings or arrays and their associated wiring to provide protection against overloads or short circuits within the marked electrical ratings in accordance with theCanadian Electrical Code(CSA C22.1Canadian Electrical Code Part I) in Canada, theStandard for Electrical Installations, NOM-001-SEDE, in Mexico and theNational Electrical CodeNEC), NFPA-70, in the United States of America.1.3These types of fuses are not intended to protect downstream inverter components, such as capacitors and against the discharge of such capacitors back into the arrays.