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GB/T 21221-2022Insulating liquids - Specifications for unused liquids based on synthetic aromatic hydrocarbons (English PDF)

绝缘液体以合成芳烃为基的未使用过的绝缘液体

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

July 11, 2022

Implementation date

February 1, 2023

Scope

GB/T 21221-2022 is the English-translated version of 绝缘液体以合成芳烃为基的未使用过的绝缘液体.

GB/T 21221-2022 is the Chinese standard "Insulating liquids - Specifications for unused liquids based on synthetic aromatic hydrocarbons".

Its scope clause reads: This document specifies the marking and general delivery of several unused synthetic aromatic hydrocarbon insulating liquids used as insulating liquid media for electrical equipment Requirements, sampling, technical specifications and test methods.

This document applies to virgin alkylbenzenes, diphenylethanes, alkylnaphthalenes and methyl polyarylates used as insulating liquid media for electrical equipment Methane. Its clauses include terms and definitions.

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Document preview — GB/T 21221-2022

National Standard of the People's Republic of China

Classification: K 15

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Marking and general delivery requirements
4.1 Packaging and Shipping
4.2 Flag
5 Sampling
6 Accuracy and Interpretation of Test Results
7 Specification for alkylbenzenes for electrical equipment
8 Specification for alkyldiphenylethanes for electrical equipment
9 Specification for alkylnaphthalenes for electrical equipment
10 Specification for methyl polyarylmethane for electrical equipment
11 Test method
11.1 Appearance
11.2 Density
11.3 Kinematic viscosity
11.4 Flash point
11.5 Pour point
11.6 Refractive Index and Specific Dispersion
11.7 Neutralization value
11.8 Chlorine content
11.9 Water content
11.10 Corrosive sulfur
11.11 Breakdown Voltage
11.12 Dielectric Dissipation Factor, Relative Permittivity, and Volume Resistivity
11.13 Stability under electric field and ionization (gassing)
Appendix A (Informative) This document is compared with the structure number of IEC 60867.1993
Appendix B (informative) Technical differences between this document and IEC 60867.1993 and their reasons

1 Scope

This document specifies the marking and general delivery of several unused synthetic aromatic hydrocarbon insulating liquids used as insulating liquid media for electrical equipment

Requirements, sampling, technical specifications and test methods.

This document applies to virgin alkylbenzenes, diphenylethanes, alkylnaphthalenes and methyl polyarylates used as insulating liquid media for electrical equipment

Methane.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 261 Determination of flash point Pensky-Martin closed cup method (GB/T 261-2021, ISO 2719.2016, MOD)

GB/T 507 Determination of breakdown voltage of insulating oil (GB/T 507-2002, IEC 156.1995, eqv)

GB/T 1884 Laboratory Determination of Density of Crude Oil and Liquid Petroleum Products (Densitometer Method) (GB/T 1884-2000, ISO 3675.

1998, eqv)

GB/T 3535 Determination of Pour Point of Petroleum Products (GB/T 3535-2006, ISO 3016.1994, MOD)

GB/T 5654 Measurement of relative permittivity, dielectric loss factor and DC resistivity of liquid insulating materials (GB/T 5654-

2007, IEC 60247.2004, IDT)

GB/T 10065-2007 Determination of gas evolution properties of insulating liquids under electrical stress and ionization (IEC 60628.1985,

MOD)

GB/T 18612-2011 Determination of Organic Chlorine Content in Crude Oil

GB/T 25961 Test method for corrosive sulfur in electrical insulating oil

GB/T 27750 Classification of insulating liquids (GB/T 27750-2011, IEC 61039.2008, IDT)

GB/T 30515 Determination of kinematic viscosity and dynamic viscosity calculation method of transparent and opaque liquid petroleum products (GB/T 30515-

2014, ISO 3104.1994, MOD)

GB/T 41146 Sampling method for insulating liquids (GB/T 41146-2021, IEC 60475.2011, IDT)

NB/T 42140 Determination of moisture by Karl Fischer automatic coulometric titration for oil-impregnated paper and oil-impregnated paperboard with insulating liquid (NB/T 42140-

2017, IEC 60814.1997, MOD)

SH/T 0205 Determination of refractive index and specific dispersion of electrical insulating liquids

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 alkylbenzenes

An insulating liquid consisting of a molecule consisting of a benzene ring and an alkyl group. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 2719.2016 · IEC 156.1995 · ISO 3675 · ISO 3016.1994 · IEC 60247.2004 · IEC 60628.1985 · IEC 61039.2008 · ISO 3104.1994 · IEC 60475.2011 · IEC 60814.1997

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