IEC 60050-445:2010 pdf – lnternational Electrotechnical Vocabulary-Part 445:Time relays.
The 1EV (IEC 60050 series) is a general purpose multilingual vocabulary covering the field ot electrotechnology. electronics and telecommunication. It comprises about 18 500 terminological entries, each corresponding to a concept. These entries are distributed among about 80 parts, each part corresponding to a given field.
Part 161 (IEC 60050-161): Electromagnetic compatibility
Part 411 (IEC 60050-411): Rotating machines
The entries follow a hierarchical classification scheme PartiSectionfConcept. the concepts being, within the sections, organized in a systematic order.
The terms, delinitions and notes in the entries are given in the three IEC languages, that is French. English and Russian (princIpal 1EV languages).
In each entry the terms alone are also given in the additional 1EV languages (Arabic. Chinese, German, Greek, Spanish, Italian. Japanese, Polish. Portuguese and Swedish).
In addition, each part comprises an alphabetical index of the terms included in that part, for each of the 1EV languages
NOTE Some languages may be messlng
Organization of a termlnological entry
Each of the entries corresponds to a concept, and comprises:
— an entry number,
— possibly a letter symbol for quantity or unit,
then, for each of the princIpal 1EV languages:
– the term designating the concept, called prelerred term, possibly accompanied by synonyms and abbreviations,
— the definition of the concept,
— possibly the source.
possibly notes.
and finally, for the additional 1EV languages, the terms alone.
Entry number
The entry number is comprised of three elements, separated by hyphens:
— Part number: 3 digits,
– Section number: 2 digits,
— Concept number: 2 digits (01 to 99).
Example: 131-13-22
Letter symbols for quantities and units
These symbols. which are language independent, are given on a separate line following the entry number
synib.: R
risistance. f Preferred term and synonyms
The preferred term is the term that heads a terminological entry: It may be followed by synonyms. It Is printed in boldface.
The synonyms are printed on separate lines under the preferred term: they are also printed In boldface, excepted for deprecated synonyms, which are printed In lightface, and followed by the attribute (deprecated).
Parts that may be omitted
Some parts of a term may be omitted, either In the field under consideration or in an approprate context. Such parts are printed in boldface type, and placed in parentheses:
Example: (electromagnetic) emission
Absence of an appropriate term:
When no adequate term exists in a given language, the preferred term is replaced by five dots. as follows:
(and there are of course no synonyms).
Each term (or synonym) may be followed by attributes giving additional information, and printed on the same line as the corresponding term, following this term.
Examples of attributes:
— specific use of the term:
transmission line (in electric power systems)
– national variant:
lift GB
— grammatical in formation:
thermoplastic, noun
AC, qualifier
— abbreviation:
EMC (abbreviation)
— deprecated: choke (deprecated).