本译本为国家能源局委托水电水利规划设计总院按照有关程序和规定，统一组织翻译的能源行业标准英文版系列译本之一。2020年10月23日，国家能源局以2020年第5号公告予以公布。本译本是根据中国电力出版社出版的《水力发电厂过电压保护和绝缘配合设计技术导则》NB/T 35067-2015翻译的，对水力发电厂过电压保护和绝缘配合设计技术作了相关规定，可供相关行业人员和高校师生参考使用。著作权归国家能源局所有。在使用过程中，如出现异议，以中文版为准。

1 General Provisions
2 Terms
3 System Voltage and Neutral Point Earthing Method
3.1 System Voltage
3.2 Neutral Point Earthing Method
3.3 Resonant Earthed Neutral System
3.4 High-Resistance Earthed Neutral System
3.5 Low-Reactance Earthed Neutral System
4 Temporary Overvoltage, Switching Overvoltage andProtection
4.1 Temporary Overvoltage and Protection
4.2 Switching Overvoltage and Protection
5 Lightning Overvoltage and Overvoltage Protection Device
5.1 Lightning Overvoltage
5.2 Lightning Rod and Earth Wire
5.3 Surge Arrester
6 Lightning Overvoltage Protection for Overhead-Line Section
6.1 General Requirements
6.2 Overvoltage Protection for Crossing Section
6.3 Overvoltage Protection for Large Span of Overhead Line
7 Lightning Overvoltage Protection for Substation and Building
7.1 Direct Lightning Protection
7.2 Induction Lightning Protection
7.3 Surge Impinging Protection
7.4 Lightning Protection for Vicinity Power Supply
8 Lightning Overvoltage Protection for Rotating ElectricalMachines
8.1 Overvoltage Protection for Generator with Directly Fed Out Lines
8.2 Overvoltage Protection for Generators Without Directly Fed Out Lines
9 Overvoltage Protection of Neutrals
9.1 Overvoltage Protection of Generator Neutrals
9.2 Overvoltage Protection of Transformer Neutrals
10 Insulation Coordination
10.1 Principle of Insulation Coordination
10.2 Insulation Coordination of Overhead Line Section
10.3 Insulation Coordination of Power Plants
Appendix A Parameters and Methods for Lightning Overvoltage Calculation
Appendix B Withstand Level Calculation When Lightning Strikes the Tower Top
Explanation of Wording in This Guide
List of Normative References