GB/T 22708-2008 English PDF

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GB/T 22708-2008: Thermal-mechanical performance test and mechanical performance test on string insulator units
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22708-2008	559	Add to Cart	5 days	Thermal-mechanical performance test and mechanical performance test on string insulator units	Valid

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Basic data

Standard ID: GB/T 22708-2008 (GB/T22708-2008)
Description (Translated English): Thermal-mechanical performance test and mechanical performance test on string insulator units
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K48
Classification of International Standard: 29.080.10
Word Count Estimation: 24,262
Date of Issue: 2008-12-30
Date of Implementation: 2009-10-01
Quoted Standard: GB/T 1001.1-2003; GB/T 2900.8
Adopted Standard: IECTR 67575-1977, MOD
Regulation (derived from): Announcement of Newly Approved National Standards No. 23 of 2008 (No. 136 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the nominal voltage greater than 1000V AC and DC overhead lines with porcelain or glass insulator insulator string element heat and mechanical performance test method. This standard also applies to the substation insulators with similar structures. Note 1: This standard applies to disc suspension insulator string components, and long rod string insulator. Note 2: The heat engine performance test proposal as a major test. The mechanical tests as a secondary additional tests and checks only for testing, and the need for the test a few years negotiated by both parties.

GB/T 22708-2008: Thermal-mechanical performance test and mechanical performance test on string insulator units

---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.
Thermal-mechanical performance test and mechanical performance test on string insulator units ICS 29.080.10 K48 National Standards of People's Republic of China Heat engine and mechanical properties test string insulator (IEC /T R60575. 1977, MOD) Posted 2008-12-30 2009-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 heat engine performance test 1 4.1 test installation 1 4.2 Test Procedure 1 4.3 Result judgment 2 5 mechanical test 3 5.1 test installation 3 5.2 Test Procedure 3 5.3 Result judgment 3 Appendix A (Informative Appendix) IEC /T R60575. 1977 Appendix A description 4 A. 1 Background 4 A. 2 Mechanics 4 insulators A. 3 Notes on the heat engine performance test of 6 A. 4 Notes on the mechanical properties of the test 6 A. 5 Test Results Overview 6 A. 6 results criteria 15 A. 7 Conclusions 17 Annex B (informative) This standard reg number and IEC /T R60575. 1977 reg control number 18 Annex C (informative) This standard and IEC /T R60575. 1977 technical differences and the reasons 19

Foreword

This revised standard adopts IEC /T R60575. 1977 "heat engine and mechanical properties of the test string insulator" (first edition). This standard is based on IEC /T R60575. 1977 redrafted. For ease of comparison, the data are listed in Appendix B of the Standard Terms and Conditions And IEC /T R60575. 1977 clauses control list. Taking into account China's national conditions, in using IEC /T R60575. 1977, the standard of this made some changes. These technical differences vertical In terms of single-line identification page margin which they relate. We give a list of those technical differences and their causes in Appendix C for reference. For ease of use, this standard also made the following editorial changes. a) "The report" be replaced by "this standard"; b) Remove IEC /T R60575. 1977 Foreword and purpose, the purpose of the note incorporated in scope; c) increase the "Normative references" and "Terms and definitions" chapters. The Standard Appendix A, Appendix B, Appendix C are informative appendices. The standard proposed by China Electrical Equipment Industrial Association. This standard by the National Standardization Technical Committee Insulators (SAC/TC80) centralized. This standard was drafted. National Insulator arrester Quality Supervision and Inspection Center, the Xi'an Institute of Electric Porcelain, Shaanxi Provincial Power Company, Liaoning Province electricity company. The main drafters of this standard. Peng Wei, Yao Junrui, Yuntao, Hu Wenqi, Chen Gang. This standard is the first release. Heat engine and mechanical properties test string insulator

1 Scope

This standard specifies the porcelain or glass insulator strings having insulating member nominal voltage greater than 1000V AC and DC overhead lines of Heat engine and mechanical performance test method components. This standard also applies to the substation insulator having a similar structure. Note 1. This standard applies to the disc-shaped suspension insulator string element and a long rod insulators string element. Note 2. The heat engine performance test is recommended as a primary test. The mechanical properties of the test as a secondary additional tests and checks only for testing, the need for And the number of samples negotiated by both parties.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 1001.1-2003 nominal voltage above 1000V Insulators for overhead lines - Part 1. Ceramic or glass AC system Glass insulator element definitions, test methods and acceptance criteria (IEC 60383-1.1993, MOD) GB/T 2900.8 Electrotechnical terminology insulator (GB/T 2900.8-1995, eqv IEC 60050-471. 1984)

3 Terms and Definitions

Terms and definitions GB/T 2900.8 established apply to this standard.

4 heat engine performance test

4.1 test installation The sample shall be drawn in by the by-products after passing the test. During the test, the test shall be subjected to tensile load, the sample can be in series or parallel to the testing machine, when connected in parallel, each sample shall bear phase And other tensile load. 4.2 Test Procedure 4.2.1 cycle test 24h insulator element shall withstand four cooling and heating cycles, and while applying a tensile load, the magnitude of the load is maintained at specified Electromechanical or mechanical failing load between (60-65)%. Each 24h cycle should first be cooled to -30 ℃ ± 5 ℃ (or -40 ℃ ± 5 ℃), which was then heated to + 40 ℃ ± 5 ℃. Temperature deviation should be controlled cooling and heating cycle to ensure that the records and cooling The minimum temperature difference between the heating temperature of 70K (or 80K). During temperature cycling at least the maximum and minimum temperatures should be continuously maintained 4h. Before the start of thermal cycling, a tensile load shall be applied at room temperature in the first insulator. At each end of the heating period, completely removable The tensile load, and then re-imposed, except the last one thermal cycle. 24h after the fourth cycle, it was cooled to room temperature, removed Tensile load. Figure 1 represents the test program that uses graphics. Note. if using low temperature -40 ℃ ± 5 ℃ agreement by both parties, when using low temperature -40 ℃ ± 5 ℃, the minimum temperature difference of 80K. 4.2.2 destruction test After the cycle test, should be removed from the insulator element tensile load on the same day, on the insulator element electromechanical or mechanical damage Load test to determine the performance of the insulator element. Electromechanical or mechanical failing load test shall GB/T 1001.1-2003 prescribed manner Method. ......

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