IEC 60027-7:2010 pdf – Letter symbols to be used in electrical technology -Part 7: Power generation, transmission,and distribution.
Thig part of fEC 60027 is applicable to generation, transmission, and distribution of electric energy. It gives names and letter symbols for quantities and units. In addition, rules for multiple subscripts and their succession are given
This part of fEC 60027 is an addition to IEC 60027-1 Therefore letter symbols already given in IEC 60027-1 are repeated only ii they have a special meaning in the field of power generation, transmission, and distribution or if they are used in this field with special subscripts
Guidance on the use of capital and lower case letters is given in IEC 60027-1, 2.1, and guidance on the representation of complex quantities,is given in IEC 60027-1. 1.6. Therefore In many cages only I is given instead of LI. j = I or ii.
2 NormatIve references
The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies. For undated references the latest edition of the referenced document (including any amendments) applies
IEC 60027-11992. Letter symbols to be used in electrical technology — Part 1: General
Amendment 1:1997
Amendment 2.2005
IEC 60027-2.2005. Letter symbols to be used vn electrical technology — Part 2. Telecommunications and electronics
IEC 60038.2009, JEC standard voltages
IEC 60050-121:1998, International Electrotechnical Vocabulary — Part 121 Electromagnetism
Amendment 1 (2002)
IEC 60050-131.2002. International Electrotechnrcal Vocabulary — Part 131. Circuit theory Amendment 1 (2008)
IEC 60050-141.2004. International Electiotechnical Vocabulary — Part 141. Polyphase systems and Circuits
IEC 60050-151:2001, International Electrotechnical Vocabulary — Part 151: Electrical and magnetic devices
IEC 60050-195:1998. International Electrotectinical Vocabulary – Part 195 Earthvng and protection against electric shock
Amendment 1(1998)
IEC 60050.411:1996, International Eiecfrotechn,cal Vocabulary – Chapter 411: Rotating machines
Amendment 1 (2007)
IEC 60050-421:1990, International Electrotechnical Vocabulary — Chapter 421. Power transformers and reactors
IEC 60050-441:1984. international Electrotechnical Vocabulary — Chapter 441 Switchgear. controlgear and fuses
Amendment 1 (2000)
IEC 60050.4421998. international Electrotechnical Vocabulary – Part 442: Electrical accessories
IEC 60050-448.1995, international Electrotechnical Vocabulary — Chapter 448 Power system protection
IEC 60050-466 1990, international Electrotechnical Vocabulary — Chapter 466 Overhead lines
IEC 60050-601:1985. International Electrotechnicat Vocabulary — Chapter 601. Generation. transmission and distribution of electricity — General
Amendment 1(1998)
IEC 60050-603.1986. international Electrotechnical Vocabulary — Chapter 603. Generation. transmission and distribution of electricity — Power system planning and management
Amendment 1 (1998)
PEC 60050.604 1987. international Electrotechnical Vocabulary — Chapter 604 Generation. transmission and distribution of electricity — Operation
Amendment 1 (1998)
IEC 60050-811:1991. international Electrotechnical Vocabulary — Chapter 811. Electric traction
IEC 60909-0.2001, Short-circuit currents in three-phase AC systems — Part 0. Calculation of currents
IECiTR 60909-I 2002. Short.ctrcuit currents in tliree.phase AC systems – Part 1: Factors for the calculation of shortcircuit currents according to IEC 60909-0
IEC!TR 60909-2 2008, Short-circuit currents in three-phase AC systems — Part 2: Data of electrical equipment for short-circuit current calculations
IEC 60909-3.2003. Short-circuit currents in three-phase AC systems — Parr 3.Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth
IEC 62428 2008. Electric power engineering — Modal components in three-phase ac. systems — Quantities and transformations
IEC 80000-6 2008. Quantities and units — Parr 6. Electromagnetism.