GB/T 20632.3-2022 English PDF (GBT20632.3-2022)

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GB/T 20632.3-2022: Vulcanized fibre for electrical purposes - Part 3: Flat sheets
GB/T 20632.3-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.035.10
CCS K 15
Vulcanized Fiber for Electrical Purposes – Part 3: Flat Sheets
(IEC 60667-3-1:2020, Vulcanized Fiber for Electrical Purposes – Part 3:
Specifications for Individual Materials – Sheet 1: Flat Sheets, MOD)
ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Classification ... 6
5 Requirements ... 7
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 3 of GB/T 20632. GB/T 20632 has published the following parts:
--- Vulcanized Fiber for Electrical Purposes – Part 1: Definitions and General Requirements;
--- Vulcanized Fiber for Electrical Purposes – Part 2: Methods of Test;
--- Vulcanized Fiber for Electrical Purposes – Part 3: Flat Sheets.
This Document modifies and adopts IEC 60667-3-1:2020 Vulcanized Fiber for Electrical
Purposes - Part 3: Specifications for Individual Materials - Sheet 1: Flat Sheets.
The technical differences and causes between this Document and IEC 60667-3-1:2020 are as
follows:
--- IEC 60667-1 (see Clauses 4 and 5) is replaced by the normatively quoted GB/T 20632.1
to adapt to China's technical conditions and improve operability;
--- The thickness deviation requirements when the thickness is greater than 12.0mm (see
Table 1) have been changed to meet the actual needs of China.
This Document made the following editorial modifications:
--- In order to coordinate with existing standards, change the name of the standard to
Vulcanized Fiber for Electrical Purposes - Part 3: Flat Sheets;
--- Correct the thickness of "internal ply adhesion" in Table 1 from "0.4" to "≤0.4".
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China Electrical Equipment Industry Association.
This Document shall be under the jurisdiction of National Technical Committee on Insulated
Materials of Standardization Administration of China (SAC/TC 51).
Drafting organizations of this Document: Electric Power Research Institute of Guangdong
Power Grid Co., Ltd.; China Southern Power Grid Technology Co., Ltd.; Hunan Guangxin
Technology Co., Ltd.; Shenzhen Power Supply Bureau Co., Ltd.; Hangzhou Special Paper
Industry Co., Ltd.; Guilin CEMT Technology Co., Ltd.; Guilin Electrical Equipment Scientific
Research Institute Co., Ltd.; Xi'an Jingzhongsheng Technology Co., Ltd.; Guangzhou Yaxin
Technology Co., Ltd.; Shaanxi Guohongfu Testing Technology Co., Ltd.; Guangdong Mingkai
Vulcanized Fiber for Electrical Purposes – Part 3: Flat Sheets
1 Scope
This Document gives classification and requirements for vulcanized fiber sheets for electrical
purposes.
This Document applies to design, manufacture and inspection, etc. of vulcanized fiber sheets
for electrical purposes. Materials made by combining with multiple layers of vulcanized fiber
are not covered by this Document.
NOTE: Materials that conform to this specification meet established levels of performance. However,
the selection of a material by a user for a specific application is based on the actual requirements
necessary for adequate performance in that application and not based on this Document alone.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 20632.1 Specification for Vulcanized Fiber for Electrical Purposes - Part 1:
Definitions and General Requirements (GB/T 20632.1-2006, IEC 60667-1:1980, MOD)
GB/T 20632.2-2022 Vulcanized Fiber for Electrical Purposes - Part 2: Methods of Test
(IEC 60667-2:2020, IDT)
3 Terms and Definitions
For the purposes of this Document, no term and definitions apply.
4 Classification
The material shall be classified as general type or fishbone type, as indicated in GB/T 20632.1.