标准号:IS 3842 Pt.9-1977
发布日期:1977/10/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This guide (Part IX) deals with application of relays for bus bar pro-tection covered by IS: 3231-1965*.1.2 This guide does not cover the principles of system design and system protection.