GB/Z 5169.50-2026 电工电子产品着火危险试验 第50部分：灼热丝/热丝基本试验方法 成品单元的防火试验

ICS13.220.40

CCSK04

中华人民共和国国家标准化指导性技术文件

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

电工电子产品着火危险试验

第50部分：灼热丝/热丝基本试验方法

成品单元的防火试验

Firehazardtestingforelectricandelectronicproducts—

Part50：Glowing/hot⁃wirebasedtestmethods—

Firecontainmenttestonfinishedunits

（IECTS60695⁃2⁃21：2023，Firehazardtesting—Part2⁃21：Glowing/hot⁃wire

basedtestmethods—Firecontainmenttestonfinishedunits，IDT）

2026⁃07⁃30发布

国家市场监督管理总局

发布

国家标准化管理委员会

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

目次

前言··························································································································Ⅲ

引言··························································································································Ⅳ

1范围·······················································································································1

2规范性引用文件········································································································1

3术语和定义··············································································································1

4试样·······················································································································3

5试验装置·················································································································3

6镍铬丝的检验···········································································································4

7状态调节·················································································································4

8试验程序·················································································································4

9观察和测量··············································································································9

10试验结果评估········································································································10

11试验报告··············································································································10

12有关产品标准需提供的资料······················································································10

附录A（规范性）圆柱体的位置示意图············································································12

附录B（规范性）NiCr丝的应用方法——内部线圈缠绕法···················································13

附录C（规范性）NiCr丝的应用方法——外部线圈缠绕法···················································16

附录D（资料性）供电线固定方法示例············································································19

附录NA（资料性）《电工电子产品着火危险试验》的组成部分···············································21

参考文献····················································································································23

图1试验程序流程图····································································································5

图2绝缘材料空腔的横截面尺寸·····················································································8

图3NiCr丝的应用方法选择流程图·················································································8

图A.1圆柱体位置示例·······························································································12

图B.1缠绕工具·········································································································14

图B.2NiCr丝圈应用示例1·························································································14

图B.3NiCr丝圈应用示例2·························································································15

图B.4NiCr丝圈应用示例3·························································································15

图C.1单连接绝缘材料外部缠绕——侧视图····································································16

图C.2单连接绝缘材料外部缠绕——正视图····································································17

图C.3非绝缘单端子电气连接示例················································································17

图C.4提供机械支撑功能的绝缘端子示例·······································································18

Ⅰ

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

图C.5一侧不可触及的绝缘端子示例·············································································18

图D.1用电条固定现有的线束······················································································19

图D.2用胶带固定在周围部件上——侧视图····································································19

图D.3用胶带固定在周围的部件上——俯视图·································································20

表B.1钻头和缠绕工具尺寸··························································································13

Ⅱ

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

前言

本文件为规范类指导性技术文件。

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规

定起草。

本文件是《电工电子产品着火危险试验》的第50部分。《电工电子产品着火危险试验》已经发布的

部分见附录NA。

本文件等同采用IECTS60695⁃2⁃21：2023《着火危险试验第2⁃21部分：灼热丝/热丝基本试验

方法成品单元的防火试验》。文件类型由IEC的技术规范调整为我国的国家标准化指导性技术

文件。

本文件做了下列最小限度的编辑性改动：

——为与现有标准协调，将标准名称改为《电工电子产品着火危险试验第50部分：灼热丝/热丝

基本试验方法成品单元的防火试验》；

——将资料性引用的ISO13943：2017和IEC62368⁃1：2018从第2章调整至参考文献，并用

ISO13943：2023替换了ISO13943：2017，用GB4943.1—2022替换了IEC62368⁃1：2018；

——增加了资料性附录NA，列出《电工电子产品着火危险试验》已经发布的部分。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由中国电器工业协会提出。

本文件由全国电工电子产品着火危险试验标准化技术委员会（SAC/TC300）归口。

本文件起草单位：中国电器科学研究院股份有限公司、海信冰箱有限公司、广东美的制冷设备有限

公司、青岛海尔电冰箱有限公司、威凯检测技术有限公司、珠海格力电器股份有限公司、南昌科晨电力

试验研究有限公司、福建省产品质量检验研究院、武汉大学、清华大学深圳国际研究生院、黄埔海关技

术中心、北京泰瑞特检测技术服务有限责任公司、深圳海关工业品检测技术中心、中山市越海电器有限

公司、杭州金松优诺电器有限公司、深圳市美信检测技术股份有限公司。

本文件主要起草人：刘秀珍、王俊、朱建高、高一盼、张汉平、栾振仙、桂怿、李唐兵、雷晓阳、黄道春、

何胜涛、郑少锋、尤莎莉、范建波、高岭松、赵兴方、宴金根、张盼、彭璟、戴兴学。

Ⅲ

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

引言

所有电工电子产品的设计都需要考虑着火风险和潜在着火危险。对元件、电路和零部件的设计以

及材料的筛选目的在于，即使发生了可预见的误用、故障和失效，也能将潜在的着火风险降低到容许范

围内。《电工电子产品着火危险试验》旨在通过减少火灾的次数或降低火灾的严重程度来挽救生命和保

护财产。它通过：

——尽可能防止带电部件引发起燃，如果发生起燃，也要将着火范围限制在电工电子产品外壳内；

——尽可能减少产品外壳以外的火焰蔓延，以及将包括热、烟、毒性或腐蚀性气体等燃烧产物的有

害影响降到最低。

《电工电子产品着火危险试验》拟由43部分组成，分为三大分领域。

——着火危险试验评定导则和术语标准，包括1项术语和8项评定导则。目的在于为本专业领域

内的着火危险评定提供指南和参考程序。

——着火试验标准，包括6项灼热丝/热丝基本试验方法、10项火焰试验方法、2项耐非正常热能

力试验方法、3项电弧起燃试验方法。目的在于介绍适用于电工电子设备生产商与检测机构

使用的，以特定热源模拟引发火灾的热源的小规模试验方法。

——燃烧流的危险性评定标准，包括2项腐蚀性、2项烟模糊、5项毒性、2项热释放、2项火焰表面

蔓延。目的在于提供测量电工电子产品及其材料的燃烧流毒性、腐蚀性、烟模糊及热释放情

况的指南和现行试验方法技术状况。

目前，多数着火危险评估技术评估的是单一材料或部件的阻燃特性。此类技术虽然能为材料和组

件的预选与验证提供支持，但无法评估材料或组件在复杂环境（如成品单元）中，一旦发生着火事件可

能产生的相互作用。

在故障情况下，成品单元可能会出现电气连接和触点过热的情况。这种过热可能是由腐蚀、压接

连接不良、组装不当、触点表面磨损或机械疲劳引起的。而绝缘材料过热会进一步导致起燃并引发

火灾。

由于成品单元潜在故障的实际情况难以模拟，因此在设计阶段以及后续的材料和部件预选过程

中，宜考虑到所有可能的着火危险。

本试验旨在验证成品单元在模拟过热电气连接场景下，能将可燃部件发生的内部着火遏制在防火

外壳内。

Ⅳ

GB/Z5169.50—2026/IECTS60695⁃2⁃21：2023

电工电子产品着火危险试验

第50部分：灼热丝/热丝基本试验方法

成品单元的防火试验

1范围

本文件描述了成品单元的防火试验方法。该方法旨在验证成品单元对内部有效起燃源引发着火

后的遏制能力。

除非相关产品标准另有规定，本文件中描述的防火性能试验方法不适用于以下任何一种情况：

——单个电气元件；

——构成成品单位的单个电气元件；

——电气安装产品，如配电板、电路保护装置、开关柜、控制装置、电缆管理系统和电气附件（配线

装置）。

本文件描述的试验方法不适用于以下电气连接：

——成品单元内最大功率小于或等于15W的低功率连接；

——钎焊和熔焊的电气连接不在本文件的评价范围内。

本文件适用于成品单元的选择和设计过程中，评估其防火能力。

除非有关标准特别提及或列出，本文件的要求、试验方法或试验条件将不适用。

2规范性引用文件

本文件没有规范性引用文件。

3术语和定义

下列术语和定义适用于本文件。

ISO和IEC维护的用于标准化的术语数据库网址如下：

——ISO在线浏览平台：http：//www.iso.org/obp；

——IEC电工百科：http：//www.electropedia.org/。

3.1

纱布cheesecloth

大约40g/m2的漂白棉布。

[来源：GB4943.1—2022，3.3.6.3，有修改]

3.2

无通风环境draught⁃freeenvironment

试验结果不受局部气流显著影响的空间环境。

注：定性示例，如能使蜡烛火焰保持基本稳定的空间环境。定量示例，如小规模着火试验中，有时指定的最大的空

气流速0.1m/s或0.2m/s。

[来源：ISO13943：2023，3.93]

1