GB/T 27749-2011
ActiveTest procedure for thermal endurance of insulating varnishes--Electric strength method
绝缘漆耐热性试验规程 电气强度法
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 概述 → 4 试样 → 5 试验设备 → 6 老化温度和时间 → 7 试验程序 → 8 计算 → 9 报告 Foreword → 1 Scope → 2 Normative References → 3 General → 4 Test specimens → 5 Test equipment → 6 Ageing temperatures and times → 7 Test procedure → 8 Calculation → 9 Report
Scope
This standard specifies a method for determining the thermal endurance of electrical insulating varnishes. The method determines the thermal endurance by measuring the electric strength of the insulating varnish coated on glass cloth before and after thermal ageing. This standard is used to evaluate the temperature index, in order to determine the suitability of electrical insulating varnishes in electrical systems.
本标准规定了确定电气绝缘漆耐热性的一种方法。该方法是通过测量涂覆在玻璃布上的绝缘漆热老化前后的电气强度来确定其耐热性。本标准用来评估温度指数，以便于确定电气绝缘漆在电气系统中的适用性。
Normative References
Keywords
Application Summary AI generated
Manufacturers and users of electrical insulating varnishes use this standard to evaluate the thermal endurance of varnishes. By measuring electric strength before and after thermal ageing, the temperature index can be determined, helping to assess suitability for use in electrical equipment such as motors and transformers. This standard is critical for ensuring long-term reliable operation of electrical systems.
电气绝缘漆制造商和用户使用本标准来评估漆的耐热性能。通过测量热老化前后的电气强度，可以确定漆的温度指数，从而判断其在电机、变压器等电气设备中的适用性。该标准对于保证电气设备长期可靠运行至关重要。
AI Summary AI generated
This standard specifies a test procedure for determining the thermal endurance of insulating varnishes using the electric strength method. The varnish is coated on glass cloth, aged at various temperatures, and its electric strength is measured to determine thermal life and temperature index. The standard details specimen preparation, test equipment, ageing procedures, electric strength measurement, and calculation methods, recommending two test methods: curved electrode and flat electrode. It is identical to IEC 60370:1971 and is used to evaluate the suitability of insulating varnishes in electrical systems.
本标准规定了通过电气强度法测定绝缘漆耐热性的试验规程。该方法将绝缘漆涂覆在玻璃布上，在不同温度下进行热老化，然后测量其电气强度，以确定热寿命和温度指数。标准详细描述了试样制备、试验设备、老化程序、电气强度测量和计算方法，并推荐了曲面电极和平板电极两种试验方法。该标准等同采用IEC 60370:1971，适用于评估绝缘漆在电气系统中的适用性。
Key Sentences extracted from text
本标准规定了确定电气绝缘漆耐热性的一种方法。
该方法是通过测量涂覆在玻璃布上的绝缘漆热老化前后的电气强度来确定其耐热性。
本标准用来评估温度指数，以便于确定电气绝缘漆在电气系统中的适用性。
影响电气绝缘漆寿命的一个主要因子是热劣化，由于热劣化使漆变脆，各种运行状况如潮气和振动均会引起电气设备的破坏。
漆的热劣化还通过电气强度的下降来检查。
This standard specifies a method for determining the thermal endurance of electrical insulating varnishes.
The method determines the thermal endurance by measuring the electric strength of the insulating varnish coated on glass cloth before and after thermal ageing.
This standard is used to evaluate the temperature index, in order to determine the suitability of electrical insulating varnishes in electrical systems.
A major factor affecting the life of electrical insulating varnishes is thermal degradation, which makes the varnish brittle, and various operating conditions such as moisture and vibration can cause damage to electrical equipment.
Thermal degradation of the varnish is also checked by the decrease in electric strength.