GB/T 11026.8-2025 Active National standards

GB/T 11026.8-2025 Electrical insulating materials—Thermal endurance properties—Part 8:Determination of thermal endurance indices(TI and RTI) of an insulating material using the fixed time frame method

GB/T 11026.8-2025 Electrical insulating materials—Thermal endurance properties—Part 8:Determination of thermal endurance indices(TI and RTI) of an insulating material using the fixed time frame method

Publish Date: 2025-10-05 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 11026.8-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Electrician's insulating materials and their products

ICS Name: Other standards related to electricity and magnetism

Publish Date: 2025-10-05

Implement Date: 2026-05-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国电气绝缘材料与绝缘系统评定标准化技术委员会(SAC/TC 301)

Pages: 48 pages

Scope

本文件描述了使用固定时限法(fixed time frame method，FTFM)对绝缘材料耐热特性、温度指数(TI)和相对温度指数(RTI)进行推导的试验和计算程序。
根据FTFM，老化过程在少数的几个固定时间段内发生，每次均使用适当的老化温度点，在相应时间段结束时，测量试样的性能。该方法与GB/T 11026.1中的规程有所不同，GB/T 11026.1的老化过程在少数几个固定温度下完成，而性能的测量则根据老化的进程在老化时间之后进行。
固定时限法所采用的诊断试验仅适用于破坏性试验，不适用于非破坏性试验和验证试验。
根据FTFM，本文件中从试验数据得到的TI和RTI符合GB/T 11026.1和GB/T 11026.2，并做了修正。其计算规程和统计试验则修改自GB/T 11026.3和GB/T 11026.7中的相应程序。

Development Information

Drafting Units:

浙江博菲电气股份有限公司、浙江荣泰电工器材股份有限公司、安徽源光电器有限公司、机械工业北京电工技术经济研究所、浙江太湖远大新材料股份有限公司、无锡江南电缆有限公司、江苏上上电缆集团有限公司、浙江荣泰科技企业有限公司、苏州太湖电工新材料股份有限公司、东方电气集团东方电机有限公司、上海电气电站设备有限公司上海发电机厂、上海雷博司电气股份有限公司、金风科技股份有限公司、中国长江三峡集团有限公司、国网山东省电力公司电力科学研究院、广东电网有限责任公司广州供电局电力科学研究院、江苏欣晨雅新材料有限公司、上海电器设备检测所有限公司、江苏中车电机有限公司、惠州市长园特发科技有限公司、哈尔滨电气动力装备有限公司、河海大学

Drafting Persons:

陈昊、刘亚丽、温城汉、狄宁宇、丁锡海、郑刚、杨帅、葛凡、顾健峰、张越、夏静、俞丽琴、刘祥松、刘雄军、史丽明、李术林、徐学敏、王振良、陈于晴、王建良、张灿灿、赵雨欣、叶志伟、孙勇、魏立东、李建喜、顾朝亮、罗文龙、王建、张经纬

Word Count: 77 Thousand words Pages: 48 pages

Same series standard

GB/T 11026.3-2025 Electrical insulating materials—Thermal endurance properties—Part 3:Instructions for calculating thermal endurance characteristics GB/T 11026.7-2025 Electrical insulating materials—Thermal endurance properties—Part 7:Determination of relative temperature index(RTI)of an insulating material

Replace the following standards

GB/T 11026.8-2014 Electrical insulating materials—Thermal endurance properties—Part 8:Determination of thermal endurance indices(TI and RTE)of an insulating material using the fixed time frame method

Referenced Standards

GB/T 10580-2003 Standard conditions for use prior to and during the testing of solid insulating materials GB/T 10580-2015 Standard conditions for use prior to and during the testing of solid electrical insulating materials GB/T 11026.1-2003 Electrical insulating materials-Properties of thermal endurance—Part 1:Ageing procedures and evaluation of test results GB/T 11026.1-2016 Electrical insulating materials—Thermal endurance properties—Part 1:Ageing procedures and evaluation of test results GB/T 11026.2-2000 Guide for the determination of thermal endurance properties of electrical insulating materials Part 2:Choice of test criteria GB/T 11026.2-2012 Electrical insulating materials—Thermal endurance properties—Part 2:Choice of test criteria GB/T 11026.4-1999 Guide for the determination of thermal endurance properties of electrical insulating materials—Part 4:Ageing ovens—Single-chamber ovens GB/T 11026.4-2012 Electrical insulating materials—Thermal endurance properties—Part 4:Ageing ovens—Single-chamber ovens GB/T 11026.5-2010 Electrical insulating materials—Thermal endurance properties—Part 5:Ageing ovens—Precision ovens for use up to 300 ℃ GB/T 11026.6-2010 Electrical insulating materials—Thermal endurance properties—Part 6:Ageing ovens—Multi-chamber ovens GB/T 21223.1-2015 Guide for the statistical analysis of ageing test data—Part 1:Methods based on mean values of normally distributed test results GB/T 11026.3-2025 Electrical insulating materials—Thermal endurance properties—Part 3:Instructions for calculating thermal endurance characteristics GB/T 11026.7-2025 Electrical insulating materials—Thermal endurance properties—Part 7:Determination of relative temperature index(RTI)of an insulating material

Adopt standards

IEC 60216-6:2022

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