WIthdrawn Standards : ETD 31


S.No. IS Number IS Title Category Superseded By
1 IS 14256 : 1995 Rating specification for semiconductor power converters for adjustable speed electric drive systems - Particularly for DC motor drives Methods of tests DECIDED BY DIVISIONAL COUNCIL - 26 AUG 2019
2 IS 2511 : 1963 Specification for polycrystalline semi - Conductor rectifier stacks Product Specification DECIDED BY DIVISIONAL COUNCIL - 26 AUG 2019
3 IS 3136 : 1965 Specification for polycrystalline semiconductor rectifier equipment Product Specification DECIDED BY DIVISIONAL COUNCIL - 26 AUG 2019
4 IS 3895 : 1966 Specification for monocrystalline semiconductor rectifier cells and stacks Product Specification Decided by divisional council
5 IS 4540 : 1968 Specification for monocrystalline semiconductor rectifier assemblies and equipment Product Specification Decided by divisional council
6 IS 7204 : Part 1 : 1974 Specification for stabilized power supplies, DC output: Part 1 terms and definitions Terminology Decided by divisional council
7 IS 7204 : Part 2 : 1980 Specification for stabilized power supplies, DC output: Part 2 rating and performance Methods of tests Decided by divisional council
8 IS 7204 : Part 3 : 1980 Specification for stabilized power supplies, DC output: Part 3 radio - Frequency interference test Methods of tests Decided by divisional council
9 IS 7204 : Part 4 : 1980 Specification for stabilized power supplies, DC output: Part 4 tests other than radio - Frequency interference Methods of tests Decided by divisional council
10 IS 7788 : 1975 Specification for single - Phase traction power convertors Product Specification Decided by divisional council