光纤互连器件和无源组件 - 性能标准 - 第021-03部分：适用于OP类别户外防护环境的单模光纤尾纤和跳线连接器

[中文适用范围]： 该最终草案国际标准是正式发布前最多6周的预发布版本。在投票期间（2026年1月16日至2026年2月27日），该标准可供销售。如果您现在购买该FDIS，您将自动获得最终出版物。IEC 61753-021-03:2026规定了单模光纤连接器（以尾纤或跳线形式终止）需满足的最低初始测试和测量要求及严酷度，以符合IEC 61753-1中定义的IEC标准类别OP（户外保护环境）的要求。如果对归类为OPHD、OP+或OP+HD类别的尾纤或跳线连接器进行测试，并通过测试，则该产品将自动被归类为符合IEC标准OP类别的产品。如果对归类为OP类别的尾纤或跳线连接器进行测试，并通过测试，则该产品将自动被归类为符合IEC标准C类或CHD类别的产品。本版标准取消并取代2012年发布的IEC 61753-021-3第一版，本版为技术修订版。与前一版相比，本版包括以下重大技术变更：a）更新环境类别（从U到OP），测试及其严酷度，以符合IEC 61753-1的规定；b）更改各种测试中使用不同类型的测试样品（尾纤测试样品和跳线测试样品）的术语和定义，以避免混淆；c）按照IEC 60793-2-50更新光纤命名规范，并增加B-657光纤的规定；d）增加IEC 61753-1中定义的所有衰减和回波损耗等级；e）删除静态侧向载荷测试；f）增加矩形套管连接器的规定；g）增加带有静态负载侧拉的光纤连接器验证测试；h）更新应变释放弯曲测试，使用衰减变化代替瞬态损耗；i）增加附录B，用于检查加强型电缆的外护套运动情况，作为温度变化、电缆保持力和应变释放弯曲测试的附加要求。 [外文原描述]： IEC 61753-021-03:2026 defines minimum initial test and measurement requirements and severities which single-mode fibre optic connectors terminated as a pigtail or a patchcord satisfy in order to be categorized as meeting the IEC standard category OP (outdoor protected environment), as defined in IEC 61753-1. If tests are performed on the connectors terminated as pigtails or patchcords for category OPHD, OP+ or OP+HD and the product passes these tests, the product will be automatically qualified or categorized as meeting the IEC standard for category OP. If tests are performed on the connectors terminated as pigtails or patchcords for category OP, and the product passes these tests, the product will be automatically qualified or categorized as meeting the IEC standard for category C or CHD. This first edition cancels and replaces the first edition of IEC 61753-021-3 published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) update of environmental categories (from U to OP), tests and their severities in accordance with IEC 61753‑1; b) changes in the terms and definitions of the different types of test samples (pigtail test samples and patchcord test samples) used in the various tests to avoid confusion; c) update of fibre naming conventions in accordance with IEC 60793‑2‑50 and addition of provisions for B‑657 fibres; d) addition of all the attenuation and return loss grades defined in IEC 61753‑1; e) deletion of the static side load test; f) addition of provisions for rectangular ferrule connectors; g) addition of the fibre optic connector proof test with static load – side pull; h) update of the flexing of the strain relief test to use change of attenuation instead of transient loss; i) addition of Annex B for visual examination of the outer cable sheath movement of reinforced cables as an additional requirement for change of temperature, cable retention and flexing of the strain relief tests.