标准号:IS 3842 Pt.12-1976
发布日期:1977/1/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This guide (Part XII) deals with the application of differential relays for transformers for ac systems, covered by IS : 3231-1965*. It also applies to differential protection of auto-transformers and generator transformer unit.1.2 This guide does not cover the principle of system design and system protection.