GB/Z 28820.3-2012Long-term radiation ageing in polymers -- Part 3: Procedures for in-service monitoring of low-voltage cable materials (English PDF)
聚合物长期辐射老化 第3部分：低压电缆材料在役监测程序
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Issued by
Ministry of Health of the People's Republic of China
Level / Type
National · Recommended
Issue date
November 5, 2012
Implementation date
February 1, 2013
Scope
GB/Z 28820.3-2012 is the English-translated version of 聚合物长期辐射老化 第3部分：低压电缆材料在役监测程序.
GB/Z 28820.3-2012 is the Chinese standard "Long-term radiation ageing in polymers -- Part 3: Procedures for in-service monitoring of low-voltage cable materials".
Its scope clause reads: This part of GB /Z 28820 summarizes the current main cable monitoring technology. These technologies are mainly aimed at the degradation of low voltage cables Monitoring.
The advantages and limitations of each approach and its development are mentioned in the relevant chapters. Its clauses include abbreviations.
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Document preview — GB/Z 28820.3-2012
National Standard of the People's Republic of China
- ICS
- 29.035.01
- Classification
- K 15
Issued by: Ministry of Health of the People's Republic of China
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Abbreviations
- 4 pairs of monitoring technology requirements
- 5 available technology
- 5.1 Overview
- 5.2 Site measurement without sampling
- 5.2.1 Overview
- 5.2.2 Indentation modulus
- 5.2.3 Sound speed
- 5.2.4 Near infrared reflection
- 5.2.5 Torque Modulus
- 5.3 micro-sampling field test
- 5.3.1 Overview
- 5.3.2 modulus drawing method
- 5.3.3 NMR relaxation
- 5.3.4 Infrared Spectroscopy (IR)
- 5.3.5 Oxidation induction period (OIT) and oxidation induction temperature (OITP)
- 5.3.6 Thermogravimetric Analysis (TGA)
- 5.3.7 Density
- 5.3.8 gel content and solvent absorption method
- 6 summary
- References
1 Scope
This part of GB /Z 28820 summarizes the current main cable monitoring technology. These technologies are mainly aimed at the degradation of low voltage cables
Monitoring. The advantages and limitations of each approach and its development are mentioned in the relevant chapters.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 26168.4-2010 Determination of the effects of ionizing radiation on electrical insulating materials - Part 4. Assessment procedures for aging during operation (IEC 60544-5.2003, IDT)
3 Abbreviations
The following abbreviations apply to this document.
BR butyl rubber
CM status monitoring
CSPE chlorosulfonated polyethylene
CP chloroprene
DLO diffusion limited oxidation
DSC Differential Scanning Calorimeter
EPR ethylene-propylene rubber
EVA ethylene vinyl acetate copolymer
IR infrared spectrum
OIT oxidation induction period
OITP oxidation induces temperature
NIR NIR spectroscopy
NMR nuclear magnetic resonance
PE polyethylene
PVC PVC PEEK polyetheretherketone
SBR styrene-butadiene rubber
TGA thermogravimetric analysis
XLPE XLPE XLPO cross-linked polyolefin
GB/T 20632.3 | GB/T 31838.7 | GB/T 36289.1 | GB/T 11026.8 | GB/T 11026.7 | GB/T 11026.3 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 42 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/Z 28820.4-2022 — Long-term radiation ageing in polymers - Part 4: Effects of different temperatures and dose rates under radiation conditions
GB/Z 28820.2-2012 — Long-term radiation ageing in polymers -- Part 2: Procedures for predicting ageing at low dose rates
GB/Z 28820.1-2012 — Long-term radiation ageing in polymers -- Part 1: Techniques for monitoring diffusion-limited oxidation
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