GB/T 43343-2023High-voltage insulation resistance meters (English PDF)

Foreword

This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by the China Electrical Equipment Industry Association: This document is under the jurisdiction of the National High Voltage Test Technology and Insulation Coordination Standardization Technical Committee (SAC/TC163): This document was drafted by: China Electric Power Research Institute Co:, Ltd:, State Grid Corporation of China, National High Voltage Metering Station, Wuhan Kang Da Electric Co:, Ltd:, State Grid Hubei Electric Power Co:, Ltd: Electric Power Research Institute, China Yangtze Electric Power Co:, Ltd: Three Gorges Hydropower Factory, Shandong University of Science and Technology, China Institute of Metrology, State Grid Heilongjiang Electric Power Co:, Ltd: Electric Power Research Institute, Shenzhen Electrical Science Research Institute Research Institute, Suzhou Huadian Electric Co:, Ltd:, Xi'an High Voltage Electrical Apparatus Research Institute Co:, Ltd:, Electric Power Department of State Grid Xinjiang Electric Power Co:, Ltd: Research Institute of Electric Power, State Grid Chongqing Electric Power Company Electric Power Research Institute, State Grid Zhejiang Electric Power Co:, Ltd: Electric Power Research Institute, Shenyang Transformer Electric Power Research Institute Co:, Ltd:, Inner Mongolia Electric Power Research Institute, State Grid Hebei Electric Power Co:, Ltd: Electric Power Research Institute, State Grid Shanghai Municipal Power Electric Power Research Institute of Electric Power Company, Electric Power Research Institute of State Grid Anhui Electric Power Co:, Ltd:, and North China Electric Power Research Institute Co:, Ltd: Company, Beijing Huatian Mechanical and Electrical Research Institute Co:, Ltd:, Anhui Dawei Electric Technology Co:, Ltd:, Jiangsu Provincial Institute of Metrology (Jiangsu Provincial Energy Measurement Institute) Data Center), State Grid Liaoning Electric Power Co:, Ltd: Electric Power Research Institute, State Grid Tianjin Electric Power Company, Wuhan Pandian Technology Co:, Ltd: Company, Standards and Metrology Institute of China Academy of Railway Sciences Group Co:, Ltd:, Electric Power Research Institute of State Grid Henan Electric Power Company, State Grid Jiangsu Electric Power Co:, Ltd: Changzhou Power Supply Company, State Grid Ningxia Electric Power Co:, Ltd: Electric Power Research Institute, State Grid Sichuan Electric Power Company Scientific Research Institute, China Southern Power Grid Co:, Ltd: Ultra-High Voltage Transmission Company, Tianjin Institute of Metrology Supervision and Inspection, Guangdong Power Grid Co:, Ltd: Electric Power Research Institute, State Grid Shanxi Electric Power Company Electric Power Research Institute, Inner Mongolia Jinglong Power Generation Co:, Ltd:, Shanghai Jiao Tong University, Xi'an Jiao Tong University: The main drafters of this document: Zhao Peng, Lei Min, Guo Xianshan, Zhou Feng, Yue Changxi, Hu Xiaohui, Zhu Kai, Cheng Cheng, Wang Quan, Yang Feng, Cao Na, Wang Hao, Wang Lei, Xiao Minying, Guo Yu, Bao Qinghua, Su Chunqiang, Diao Yinglong, Liu Weixin, Long Yingkai, Gong Jinlong, Lu Xiangpeng, Che Chuanqiang, Pan Jin, Yuan Zhiwen, Liu Jing, Wang Ting, Li Junke, Zhang Lichao, Zhang Luyan, Jin Xin, Man Yuyan, Zhong Lei, Wang Chunjie, Sun Jun, Lei Dong, Wang Tian, Liu Xiaokang, Wu Xutao, Xie Shijun, Zhang Changhong, Zhao Xinming, Zhou Dan, Yu Hua, Wei Guanghong, Wang Hui, Liu Xuandong: High voltage insulation resistance meter

1 Scope

China's national standard for high-voltage insulation resistance meters. The instrument applies a direct voltage of hundreds or thousands of volts across an insulation and measures the resulting current, and it is the fundamental test of electrical equipment condition: cables, motor windings, transformers and switchgear are all assessed by it, before commissioning and periodically thereafter. The high test voltage is what distinguishes it from an ordinary ohmmeter and is what makes it meaningful, because insulation that is sound at low voltage can break down at working voltage, and only a test at a comparable stress reveals it. The measurements that matter are not the resistance alone but its behaviour over time - the polarisation index and the dielectric absorption ratio, which compare readings at one and ten minutes and reveal moisture and contamination that a single reading would miss.

This document specifies the functions and classifications, technical requirements, test methods, and inspection regulations of high-voltage insulation resistance meters (hereinafter referred to as "insulation meters"): The standard, marking, packaging, transportation and storage requirements, describes the test method: This document applies to the design, manufacture and type testing of insulation meters with rated voltages above 1500V:

2 Normative reference documents

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

GB/T 191 Packaging, storage and transportation pictorial mark

GB/T 4208-2017 Shell protection level (IP code)

GB 4793:1-2007 Safety requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements

GB/T 6587-2012 General specifications for electronic measuring instruments

GB/T 9969 General Principles of Instructions for Use of Industrial Products

GB/T 17626:2-2018 Electromagnetic compatibility testing and measurement technology electrostatic discharge immunity test

GB/T 17626:3-2016 Electromagnetic compatibility testing and measurement technology Radio frequency electromagnetic field radiation immunity test

GB/T 17626:4-2018 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test

GB/T 17626:5-2019 Electromagnetic compatibility testing and measurement technology surge (impact) immunity test

GB/T 17626:6-2017 Electromagnetic compatibility test and measurement technology Conducted disturbance immunity induced by radio frequency fields GB/T 17626:

11 Electromagnetic compatibility testing and measurement technology Part 11: Equipment for each phase input current less than or equal to 16A Voltage sag, short interruption and voltage change immunity test of equipment

GB/T 18268:1-2010 Electromagnetic compatibility requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements JJG622-1997 Insulation resistance meter (megger)

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 insulation resistanceinsulationresistance The ratio of the DC voltage applied between two electrodes of an insulating structure to the current flowing through that pair of electrodes: 3:

2 Measuring terminal testterminal The terminals used to connect the object under test in the insulation table are divided into line terminals L and ground terminals according to their connection parts with the object under test: E and shield terminal G: [Source: JJG1005-2019, 3:2, modified]