Standard No.:	DL/T 684-2025
English Name:	Guide of calculating settings of relay protection for large generator and transformer
Chinese Name:	大型发电机变压器继电保护整定计算导则
Chinese Classification:	K45    Relay protection and automatic device
Professional Classification:	DL    Professional Standard - Electricity
ICS Classification:	29.240.30 29.240.30    Control equipment for electric power systems 29.240.30
Source Content Issued by:	China Energy Aminidstration
Issued on:	2025-09-28
Implemented on:	2026-3-28
Status:	to be valid
Superseding:	DL/T 684-2012 Guide of calculating settings of relay protection for large generator and transformer
Target Language:	English
File Format:	PDF

本标准规定了大型发电机变压器继电保护的整定计算原则和方法，它是设计、科研、运行、调试和制造部门整定计算的依据。
本标准适用于GB/T 14285-2006所规定的发电机、变压器容量范围，重点规定了300MW及以上发电机与220kV及以上变压器的继电保护的整定计算原则和方法。
小容量发电机、低电压等级变压器的整定计算参考执行。