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GB/T 41633.3-2022 English PDF

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GB/T 41633.3-2022: Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 41633.3-2022	English	394	Add to Cart	4 days [Need to translate]	Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils	Valid	GB/T 41633.3-2022

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Basic data

Standard ID	GB/T 41633.3-2022 (GB/T41633.3-2022)
Description (Translated English)	Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K15
Classification of International Standard	29.040.10
Word Count Estimation	18,165
Date of Issue	2022-11-08
Date of Implementation	2023-06-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 41633.3-2022: Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Insulating liquids - Determination of acidity - Part 3.Test methods for non-mineral insulating oils ICS 29.040.10 CCSK15 National Standards of People's Republic of China Determination of acid value of insulating liquid Part 3.Test methods for non-mineral insulating oils (IEC 62021-3.2014, IDT) Released on 2022-11-08 2023-06-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Method A. Automatic Potentiometric Titration 2 4.1 Principle 2 4.2 Reagents and auxiliary materials 2 4.3 Instrument 3 4.4 Sampling 3 4.5 Electrode preparation and maintenance 4 4.6 Calibration 4 4.7 Test step 5 4.8 Calculation of results 6 4.9 Precision 7 4.10 Report 7 5 Method B. Colorimetric Titration 7 5.1 Principle 7 5.2 Reagent 7 5.3 Instruments 8 5.4 Sampling 9 5.5 Step 9 5.6 Calculation results 10 5.7 Precision 10 5.8 Report 10 Appendix A (informative) Determination of acid value of non-mineral insulating oil by photometric titration 11 A.1 Principle 11 A.2 Reagents and solvents 11 A.3 Preparation of titration solutions and solvents 11 A.4 Instrument 12 A.5 Sampling 13 A.6 Step 13 A.7 Calculation results 14 A.8 Report 15

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is part 3 of GB/T 41633 "Determination of Acid Value of Insulating Liquids". GB/T 41633 has issued the following parts. --- Part 2.Colorimetric titration; --- Part 3.Test methods for non-mineral insulating oils. This document is identical to IEC 62021-3.2014 "Determination of Acid Value of Insulating Liquids Part 3.Test Method for Non-Mineral Insulating Oils" Law". Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Standardization Technical Committee of Insulation Materials (SAC/TC51). This document was drafted by. State Grid Henan Electric Power Company Electric Power Research Institute, Guilin Saimeng Testing Technology Co., Ltd., State Grid Zhejiang Province Electric Power Research Institute of Electric Power Company, Shenzhen Jinghao Capacitor Co., Ltd., Guilin Electrical Appliance Science Research Institute Co., Ltd., Guangdong Power Grid Co., Ltd. Ren company Electric Power Research Institute, Guangdong Yisheng Testing Co., Ltd., Zhejiang Huiri Environmental Testing Co., Ltd., Zaozhuang Huitian Meiya Insulation Festival Energy Building Materials Co., Ltd., Xi'an Kaijinzhe Testing Co., Ltd., Dongguan Ruijing Electric Technology Co., Ltd., Guangdong Tehua Technology Co., Ltd., Guangdong Chengxin Technology Co., Ltd., Zhejiang Anya Intelligent Technology Co., Ltd., Shaanxi Runzheng Testing Technology Co., Ltd., Guangdong Yidu Technology Co., Ltd., Yiwu Quanyi Mold Industry Development Co., Ltd., Shaanxi Jinyoubang Technology Co., Ltd., Jiangsu Meixida Technology Co., Ltd. The main drafters of this document. Kou Xiaoshi, Yang Tao, Shao Xianjun, Zhao Jie, Liao Zhifei, He Yuping, Li Chen, Wu Zhuoting, Xiong Xuemei, Luo Chuanyong, Qian Yihua, Fu Qiang, Xiang Xiaoyun, Wang Cuilin, Song Guangsheng, Wu Caichun, Lin Jinli, Zhang Yuanlin, Huang Jianwei, Nan Shaowei, Deng Daicong, Li Shouying, Jin Chenggao, Su Shiqiao, Pi Kunlan.

Introduction

health and safety This document is not intended to address all safety issues related to its use, and it is the user's responsibility to establish appropriate health and safety rules to ensure the applicability of this document. The mineral oil involved in this document should be protected by personal protection. If it comes into direct contact with the eyes, it may cause slight pain. If it comes into contact with the eyes, use Flush eyes with plenty of clean running water and seek medical attention. Some of the tests covered in this document may result in hazardous conditions. Please refer to the relevant guidance documents. environment This document will refer to mineral oil, chemicals and used sample containers. Relevant disposal should avoid impact on the environment, and various measures should be taken. This preventive measure prevents minerals from polluting the environment. The acid value measurement standard of insulating liquid is widely used in the research and development, production, quality inspection, sales, acceptance and technical exchange of insulating liquid products. This series of standards can guide the industry to more effectively carry out the detection and evaluation of the acid value of insulating liquids, and can improve the quality and quality of insulating liquid products. Application reliability. The standards for the determination of the acid value of insulating liquids are written in different parts. In order to maintain the same writing method as the corresponding IEC standards, When compiling this series of documents, different parts need to be compiled separately. GB/T 41633 describes the standard method for the determination of the acid value of insulating liquids, which is proposed to consist of the following parts. --- Part 1.Automatic potentiometric titration. The purpose is to determine the method and procedure for measuring the acid value of insulating liquid by automatic potentiometric titration. --- Part 2.Colorimetric titration. The purpose is to determine the method and procedure for measuring the acid value of insulating liquid by colorimetric titration. --- Part 3.Test methods for non-mineral insulating oils. The purpose is to identify unused and used non-mineral insulating oleic acid for electrical purposes There are two test methods for the value. automatic potentiometric titration and colorimetric titration. Determination of acid value of insulating liquid Part 3.Test methods for non-mineral insulating oils

1 Scope

This document describes two test methods for the acid value of unused and used non-mineral insulating oils for electrical purposes. potentiometric titration and colorimetry titration. Note 1.In unused and used electrical non-mineral insulating oils, acidic components include organic acids, phenolic compounds, oxidation products, resins, organic gold Salt and additives etc. This document may be used to indicate the relative change that occurs during service of non-mineral insulating oils for electrical purposes under oxidizing conditions, regardless of their color Whether the degree or other characteristics have changed. Acid value can be used for quality control of unused non-mineral insulating oils for electrical purposes. Oxygen present in used electrical non-mineral insulating oils Oxidation products will affect its acid value, and these oxidation products have large differences in corrosion characteristics, so this document cannot be used to predict Corrosiveness of electrical non-mineral insulating oils in use. Note 2.The acid value results measured by potentiometric titration and the acid value results measured by colorimetric titration may be the same or different in value, but they are usually are in the same order of magnitude.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. Note. GB/T 6379 (all parts) Accuracy (trueness and precision) of measurement methods and results [ISO 5725 (all parts)] Note. GB/T 41146-2021 insulating liquid sampling method (IEC 60475.2011, IDT)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 acidity After the sample is dissolved in the specified solvent by potentiometric titration or colorimetric titration, the amount of alkali required for titration to the end point is calculated as the sample expressed as the mass fraction of potassium hydroxide. Note. See Appendix A for the determination of the acid value of non-mineral insulating oil by photometric titration.

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