GB/T 46149-2025Non-destructive testing — Terahertz detection method for insulating materials (English PDF)

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.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee for Standardization of Non-destructive Testing (SAC/TC56).

This document was drafted by: East China Electric Power Research Institute Co., Ltd., Shanghai Materials Research Institute Co., Ltd., Chongqing University, State Grid Shanghai Power Company, Qingdao Qingyuan Fengda Terahertz Technology Co., Ltd.

The main drafters of this document are: Luo Guofang, Cheng Li, Jiang Jiansheng, Huang Xingde, Yang Chao, Yang Xingang, Han Lina, Yang Lijun, Lu Qiyu, Meng Kun, Chen Hongtao and Liu Pingan.

Terahertz testing method for non-destructive testing of insulating materials

1 Scope

This document describes a method for testing insulating materials used in electrical equipment using terahertz testing technology.

This document applies to the defects and moisture content of solid insulating materials with a thickness of 0.03mm~10mm and liquid insulating materials Terahertz detection of moisture content. For solid insulating materials of other thicknesses, refer to the same procedure.

This document does not apply to cellulose-based solid insulation materials with a thickness exceeding 5 mm.

2 Normative references

GB/T 2900.5

GB/T 7600

GB/T 13962

GB/T 20737

JJF1603

IEC 60814

3 Terms and Definitions

The terms and definitions defined in GB/T 2900.5, GB/T 13962 and GB/T 20737 and the following terms and definitions apply to this document.