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EN 60027-1:2006/A2:2007

Current
Current

The latest, up-to-date edition.

LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 1: GENERAL
Published date

04-18-2007

FOREWORD
SECTION 0: GENERAL
Scope
SECTION 1: RECOMMENDATIONS FOR PRINTING SYMBOLS AND NUMBERS
1.1 Symbols for quantities
    1.1.1 Symbols
    1.1.2 Rules for printing of subscripts and use of subscripts
          in electrical technology
    1.1.3 Rules
    1.1.4 Combination of symbols for quantities; elementary
          operations with quantities
    1.1.5 Substitution of letters
1.2 Names and symbols for units
    1.2.1 International symbols for units
    1.2.2 Combination of symbols for units
    1.2.3 Printing of symbols for units
    1.2.4 Printing and use of prefixes
    1.2.5 Spelling of names of units in the English language
1.3 Numbers
    1.3.1 Printing of numbers
    1.3.2 Decimal sign
    1.3.3 Multiplication of numbers
1.4 Mathematical signs and symbols
1.5 Expressions for quantities
1.6 Complex representation of quantities
SECTION 2: GENERAL RECOMMENDATIONS FOR TIME-DEPENDENT QUANTITIES
2.1 Quantities that vary with time periodically
2.2 Quantities that vary with time non-periodically
SECTION 3: SYMBOLS FOR QUANTITIES AND THEIR UNITS, SELECTED
           CONSTANTS AND SIGNS
3.1 Introduction to tables for quantities and their units
3.2 Introduction to the tables for subscripts
3.3 Introduction to the table for mathematical signs and symbols
3.4 Introduction to the tables for time-dependent quantities
Annexes
A - Greek alphabet
B - Glossary of terms concerning letter symbols
    B.1 Terms concerning the structure of letter symbols
    B.2 Styles of letters
        B.2.1 Names of various marks added to a kernel (X)
        B.2.2 Illustrative examples
C - Examples of time-dependent quantities
    C.1 Examples of periodic quantities
    C.2 Examples of transient quantities
    C.3 Example of a random quantity
D - Examples of use of source voltage and source current in
    equivalent circuits
E - Special note concerning the rules for the names of
    quantities and units
F - Systems of units and quantities
G - Bibliography

Presents information about general quantities, units and their letter symbols and mathematical symbols that are to be used in electrical technology.

Committee
SR 25
DevelopmentNote
Supersedes HD 60027-1. (11/2006)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current
Supersedes

CEI EN 60027-7 : 2011 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 7: POWER GENERATION, TRANSMISSION AND DISTRIBUTION
CEI EN 60027-6 : 2008 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 6: CONTROL TECHNOLOGY
BS EN 62341-1-1:2009 Organic light emitting diode (OLED) displays Generic specifications
CEI EN 61310-2 : 2008 SAFETY OF MACHINERY - INDICATION, MARKING AND ACTUATION - PART 2: REQUIREMENTS FOR MARKING
BS EN 61310-2:2008 Safety of machinery. Indication, marking and actuation Requirements for marking
CEI UNI EN 80000-6 : 2009 QUANTITIES AND UNITS - PART 6: ELECTROMAGNETISM
BS EN 60539-1:2016 Directly heated negative temperature coefficient thermistors Generic specification
BS EN 140101:2008 Blank Detail Specification. Fixed low power film resistors
BS EN 60034-1:2010 Rotating electrical machines Rating and performance
I.S. EN 60034-1:2010 ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE
I.S. EN 140402-801:2015 DETAIL SPECIFICATION: FIXED LOW POWER WIREWOUND SURFACE MOUNT (SMD) RESISTORS - RECTANGULAR - STABILITY CLASSES 0,5; 1; 2
BS EN 60086-4:2015 Primary batteries Safety of lithium batteries
EN 140402-801:2015 Detail specification: Fixed low power wirewound surface mount (SMD) resistors - Rectangular - Stability classes 0,5; 1; 2
EN 60034-2-1:2014 Rotating electrical machines - Part 2-1: Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)
EN 140101:2008 Blank Detail Specification: Fixed low power film resistors
EN 60115-2:2015 Fixed resistors for use in electronic equipment - Part 2: Sectional specification: Leaded fixed low power film resistors
EN 60027-2:2007 Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics
EN 140401:2009 Blank Detail Specification: Fixed low power film surface mount (SMD) resistors
EN 80000-6:2008 Quantities and units - Part 6: Electromagnetism
EN 140402:2015/A1:2016 BLANK DETAIL SPECIFICATION: FIXED LOW POWER WIREWOUND SURFACE MOUNT (SMD) RESISTORS
OVE/ONORM EN 60027-2 : 2007 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 2: TELECOMMUNICATIONS AND ELECTRONICS
BS EN 60115-8:2012 Fixed resistors for use in electronic equipment Sectional specification. Fixed surface mount resistors
BS EN 60027-2:2007 Letter symbols to be used in electrical technology Telecommunications and electronics
CEI EN 60034-1 : 2015 ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE
CEI EN 60393-1 : 2010 POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT - PART 1: GENERIC SPECIFICATION
I.S. EN 140402:2015 BLANK DETAIL SPECIFICATION: FIXED LOW POWER WIREWOUND SURFACE MOUNT (SMD) RESISTORS
BS EN 60115-1 : 2011 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 1: GENERIC SPECIFICATION
I.S. EN 60115-8:2012 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 8: SECTIONAL SPECIFICATION - FIXED SURFACE MOUNT RESISTORS (IEC 60115-8:2009 (MOD))
I.S. EN 60027-2:2007 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 2: TELECOMMUNICATIONS AND ELECTRONICS
I.S. EN 140401:2009 BLANK DETAIL SPECIFICATION: FIXED LOW POWER FILM SURFACE MOUNT (SMD) RESISTORS
I.S. EN 60393-1:2009 POTENTIOMETERS FOR USE IN ELECTRONIC EQUIPMENT - PART 1: GENERIC SPECIFICATION
I.S. EN 140100:2008 SECTIONAL SPECIFICATION: FIXED LOW POWER FILM RESISTORS
I.S. EN 60034-2-1:2014 ROTATING ELECTRICAL MACHINES - PART 2-1: STANDARD METHODS FOR DETERMINING LOSSES AND EFFICIENCY FROM TESTS (EXCLUDING MACHINES FOR TRACTION VEHICLES)
BS EN 60115-2:2015 Fixed resistors for use in electronic equipment Sectional specification: Leaded fixed low power film resistors
BS EN 60034-2-1:2014 Rotating electrical machines Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)
CEI EN 60115-8-1 : 2016 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 8-1: BLANK DETAIL SPECIFICATION: FIXED SURFACE MOUNT (SMD) LOW POWER FILM RESISTORS FOR GENERAL ELECTRONIC EQUIPMENT, CLASSIFICATION LEVEL G
BS EN 60393-1:2009 Potentiometers for use in electronic equipment Generic specification
BS EN 140401-801 : 2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25; 0,5; 1
BS EN 140401-803 : 2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - CYLINDRICAL - STABILITY CLASSES 0,05; 0,1; 0,25; 0,5; 1; 2
I.S. EN 60115-2:2015 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 2: SECTIONAL SPECIFICATION: LEADED FIXED LOW POWER FILM RESISTORS
14/30317306 DC : 0 BS EN 60115-8-1:2014+A1 - FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 8-1: BLANK DETAIL SPECIFICATION: FIXED SURFACE MOUNT (SMD) LOW POWER FILM RESISTORS FOR GENERAL ELECTRONIC EQUIPMENT, CLASSIFICATION LEVEL G
I.S. EN 140401-804:2011 DETAIL SPECIFICATION: FIXED LOW POWER FILM HIGH STABILITY SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25
BS EN 140402 : 2015 BLANK DETAIL SPECIFICATION: FIXED LOW POWER WIREWOUND SURFACE MOUNT (SMD) RESISTORS
I.S. EN 60027-6:2007 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 6: CONTROL TECHNOLOGY
I.S. EN 140101-806:2009 DETAIL SPECIFICATION: FIXED LOW POWER FILM RESISTORS - METAL FILM RESISTORS ON HIGH GRADE CERAMIC, CONFORMAL COATED OR MOLDED, AXIAL OR PREFORMED LEADS
I.S. EN 60115-8-1:2015 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 8-1: BLANK DETAIL SPECIFICATION: FIXED SURFACE MOUNT (SMD) LOW POWER FILM RESISTORS FOR GENERAL ELECTRONIC EQUIPMENT, CLASSIFICATION LEVEL G
BS EN 140401-804 : 2011 DETAIL SPECIFICATION: FIXED LOW POWER FILM HIGH STABILITY SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25
BS EN 140401:2009 Blank Detail Specification. Fixed low power film surface mount (SMD) resistors
I.S. EN 61310-2:2008 SAFETY OF MACHINERY - INDICATION, MARKING AND ACTUATION - PART 2: REQUIREMENTS FOR MARKING
I.S. EN 60115-1:2011 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 1: GENERIC SPECIFICATION (IEC 60115-1:2008, MODIFIED)
EN 140401-804:2011/A1:2013 DETAIL SPECIFICATION: FIXED LOW POWER FILM HIGH STABILITY SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25
EN 60086-4:2015 Primary batteries - Part 4: Safety of lithium batteries
BS EN 80000-6:2008 Quantities and units Electromagnetism
BS EN 140100:2008 Sectional specification. Fixed low power film resistors
CEI EN 60027-4 : 2008 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 4: ROTATING ELECTRICAL MACHINES
10/30237986 DC : 0 BS EN 140401-804 - DETAIL SPECIFICATION: FIXED LOW POWER FILM HIGH STABILITY SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25
08/30186808 DC : DRAFT JULY 2008 BS EN 140401 - BLANK DETAIL SPECIFICATION - FIXED LOW POWER NON-WIRE-WOUND SURFACE MOUNT (SMD) RESISTORS
BS EN 140401-802 : 2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 1; 2
14/30311384 DC : 0 BS EN 60115-2:2014+A1 - FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 2: SECTIONAL SPECIFICATION: LEADED FIXED LOW POWER FILM RESISTORS
BS EN 60115-8-1:2015 Fixed resistors for use in electronic equipment Blank detail specification: Fixed surface mount (SMD) low power film resistors for general electronic equipment, classification level G
BS EN 60027-6:2007 Letter symbols to be used in electrical technology Control technology
12/30258453 DC : 0 BS EN 62368-1 AMD - AUDIO/VIDEO, INFORMATION AND COMMUNICATION TECHNOLOGY EQUIPMENT - PART 1: SAFETY REQUIREMENTS
I.S. EN 60027-7:2010 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 7: POWER GENERATION, TRANSMISSION AND DISTRIBUTION
CEI EN 62368-1 : 2016 AUDIO/VIDEO, INFORMATION AND COMMUNICATION TECHNOLOGY EQUIPMENT - PART 1: SAFETY REQUIREMENTS
I.S. EN 140101:2008 BLANK DETAIL SPECIFICATION: FIXED LOW POWER FILM RESISTORS
I.S. EN 62368-1:2014 AUDIO/VIDEO, INFORMATION AND COMMUNICATION TECHNOLOGY EQUIPMENT - PART 1: SAFETY REQUIREMENTS (IEC 62368-1:2014, MODIFIED)
EN 62368-1:2014/AC:2017-03 AUDIO/VIDEO, INFORMATION AND COMMUNICATION TECHNOLOGY EQUIPMENT - PART 1: SAFETY REQUIREMENTS (IEC 62368-1:2014, MODIFIED)
EN 140401-802:2007/A3:2017 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 1; 2
I.S. EN 60027-4:2007 LETTER SYMBOLS TO BE USED IN ELECTRIC TECHNOLOGY - PART 4: ROTATING ELECTRIC MACHINES
I.S. EN 140401-802:2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 1; 2
I.S. EN 140401-803:2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - CYLINDRICAL - STABILITY CLASSES 0,05; 0,1; 0,25; 0,5; 1; 2
EN 60539-1:2016/AC:2017-09 DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS - PART 1: GENERIC SPECIFICATION (IEC 60539-1:2016/COR1:2017)
EN 60115-1:2011/A11:2015 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 1: GENERIC SPECIFICATION
BS EN 140402-801:2015 Detail specification: Fixed low power wirewound surface mount (SMD) resistors. Rectangular. Stability classes 0,5; 1; 2
EN 60027-4:2007 Letter symbols to be used in electrical technology - Part 4: Rotating electrical machines
EN 60027-6:2007 Letter symbols to be used in elecrical technology - Part 6: Control technology
I.S. EN 80000-6:2008 QUANTITIES AND UNITS - PART 6: ELECTROMAGNETISM
CEI EN 60115-2 : 2016 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 2: SECTIONAL SPECIFICATION: LEADED FIXED LOW POWER FILM RESISTORS
CEI EN 140401 : 2009 BLANK DETAIL SPECIFICATION: FIXED LOW POWER FILM SURFACE MOUNT (SMD) RESISTORS
CEI EN 60115-8 : 2013 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT - PART 8: SECTIONAL SPECIFICATION - FIXED SURFACE MOUNT RESISTORS
BS EN 60027-7:2010 Letter symbols to be used in electrical technology Power generation, transmission and distribution
BS EN 60027-4:2007 Letter symbols to be used in electric technology Rotating electric machines
UNE-EN 60027-4:2011 Letter symbols to be used in electrical technology -- Part 4: Rotating electric machines
BS EN 140101-806 : 2008 DETAIL SPECIFICATION: FIXED LOW POWER FILM RESISTORS - METAL FILM RESISTORS ON HIGH GRADE CERAMIC, CONFORMAL COATED OR MOLDED, AXIAL OR PREFORMED LEADS
UNI CEI EN 80000-6 : 2009 QUANTITIES AND UNITS - PART 6: ELECTROMAGNETISM
UNE-EN 60034-22:2010 Rotating electrical machines -- Part 22: AC generators for reciprocating internal combustion (RIC) engine driven generating sets
I.S. EN 140401-801:2007 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25; 0,5; 1
I.S. EN 60539-1:2016 DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS - PART 1: GENERIC SPECIFICATION
EN 140401-803 : 2007 AMD 3 2017 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - CYLINDRICAL - STABILITY CLASSES 0,05; 0,1; 0,25; 0,5; 1; 2
EN 140101-806 : 2008 COR 2014 DETAIL SPECIFICATION: FIXED LOW POWER FILM RESISTORS - METAL FILM RESISTORS ON HIGH GRADE CERAMIC, CONFORMAL COATED OR MOLDED, AXIAL OR PREFORMED LEADS
EN 140401-801:2007/A1:2013 DETAIL SPECIFICATION: FIXED LOW POWER FILM SMD RESISTORS - RECTANGULAR - STABILITY CLASSES 0,1; 0,25; 0,5; 1
EN 62341-1-1:2009 Organic light emitting diode (OLED) displays - Part 1-1: Generic specifications
EN 60027-7:2010 Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution
EN 60115-8:2012 Fixed resistors for use in electronic equipment - Part 8: Sectional specification - Fixed surface mount resistors
EN 60034-1:2010/corrigendum Oct. 2010 ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE
EN 60115-8-1:2015 Fixed resistors for use in electronic equipment - Part 8-1: Blank detail specification: Fixed surface mount (SMD) low power film resistors for general electronic equipment, classification level G
EN 140100:2008 Sectional Specification: Fixed low power film resistors
EN 60393-1:2009 Potentiometers for use in electronic equipment - Part 1: Generic specification
EN 61310-2:2008 Safety of machinery - Indication, marking and actuation - Part 2: Requirements for marking

ISO 31-11:1992 Quantities and units Part 11: Mathematical signs and symbols for use in the physical sciences and technology
ISO 31-0:1992 Quantities and units Part 0: General principles
IEC 60375:2003 Conventions concerning electric and magnetic circuits
ISO 31-2:1992 Quantities and units Part 2: Periodic and related phenomena

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