IEC 60027-1A:1976 PDF

Scope: "PREFACE This publication has been prepared by IEC Technical Committee No 25@ Quantities and Units@ sand their Letter Symbols. When Publication 27-1 was originally prepared@ electro technology concerned itself primarily with sinusoidal waveforms Accordingly@ Clause 4 that publication gave special notations suitable for sinusoidal waves@ but did not cover more complicated situations. In modern technology@ there is need to distinguish between ""peak"" and ""maximum"" to indicated values of running averages of various types This publication was therefore developed by TC 25@ not with the intention of changing Publication 27-1 but for purpose of extending its usefulness to the problems of modern practice which involve non-sinusoidal waveforms@ noise and other complications The present publication is therefore a supplement to Publication 27-1"

IEC 60027-1A:1976 history

2005 IEC 60027-1:1992/AMD2:2005 Letter symbols to be used in electrical technology - Part 1: General; Amendment 1
1997 IEC 60027-1:1992/AMD1:1997 Letter symbols to be used in electrical technology - Part 1: General; Amendment 1
1993 IEC 60027-1:1992/COR1:1993 Letter symbols to be used in electrical technology - Part 1: General; Corrigendum 1
1992 IEC 60027-1:1992 Letter symbols to be used in electrical technology; part 1: general
1970 IEC 60027-1:1971/AMD4:1983 Amendment 4 - Letter symbols to be used in electrical technology - Part 1: General
1970 IEC 60027-1:1971/AMD3:1981 Amendment 3 - Letter symbols to be used in electrical technology - Part 1: General
1970 IEC 60027-1:1971/AMD2:1977 Amendment 2 - Letter symbols to be used in electrical technology - Part 1: General
1970 IEC 60027-1:1971/AMD1:1974 Amendment 1 - Letter symbols to be used in electrical technology - Part 1: General
1971 IEC 60027-1:1971 Symboles littéraux à utiliser en électrotechnique Premiére Partie 1: Généralités (Edition 5.0; Incorporated Amendment No. 1: 1974; Amendment No. 2: 1977)