IEC 60050-445:2002 pdf download

IEC 60050-445:2002 pdf download.International Electrotechnical Vocabulary Part 445: Specified time all-or-nothing relays.
1) The IEC (Inlernational Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees fIEC National Cosvlmitte.al The oOect of the IEC Is to promote international co-operation on all questions concerning standardization in th. wiscincal and electronic fields To his end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to techncal cornmittees any IEC National Committee Interested in the sub)ect dealt with may participate In this preparatory work, International. governmental and non-gov.rrwn.ntal organizations liaising with the IEC also participate in this preparation The IEC collaborates closely with the International Organization for Standardization (ISO) n accordance with conditions determined by agreement between the two organizations
2) The formal decisions or agreements of the IEC on technical mailers •apr.sa. as nearly as possible, an international consensus of opinion on the relevant aubjects since each technical Committee has representation from all interested National Committees
3) The documents produced have the form of recommendations tot inlernational us. and are published in th, form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees In that sense.
4) In order to promote international unifIcation. IEC National Committees undertalte to apply IEC International Standards transparently to th maicimum e,ctent possibl, in their national and regional standards Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearty Indicated in the latter
5) The IEC provldes no marling procedure to indicate its approval and cannot be rendered responsible for any .quipm.nl declared to be in conformity with one of its standards
6) Attention is drawn to lb. posseility that sonic of the elements of thu International Standard may be lie subecl of patent rights. The IEC sham not be held responsible for Identifying any or am such patent rights
International Standard IEC 60050445 has been prepared by the sub-group 2 of working group 446. of IEC technical committee 1: Terminology.
The text of this standard is based on the following documents:
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table.
In these parts of 1EV, the terms and derinitions are written in French and English; in addition the terms are given in Chinese (cn), German (de), Spanish (es), Japanese (ja), Polish (p1). Portuguese (pt) and Swedish Cay).
This publication has been drafted in accordance with the ISO)IEC Directives, Part 3.
The committee has decided that the contents of this publication will remain unchanged until 2013. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended,
The 1EV (IEC 60050 senes) is a general purpose multilingual vocabulary covering the field of electrotechnology, electronics and telecommunication. It con’iprises about 18 500 terminologic& entries, each corresponding to a concept. These entries are distributed among about 80 parts. each part Corresponding to a given field.
Examples:
Part 181 (IEC 60050-161): Electromagnetic compatibility
Part 411 (IEC 60050-411): Rotating machines
The entries follow a hierarchical classification scheme PartlSectionlConcept. the concepts being, within the sections. organized in a systematic order.
The terms, definitions and notes in the entries are given in the three IEC official 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 alphabelical index of the terms included In that part, for each of the 1EV languages.
NOTE – Some languages may be missing.
Organization of a terminological 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 pre tarred 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 -1 3.22.