6 ©.D.U./U.D.C.: 621.3.012.001.11,001.29:744.4:089/084,001.11,001.99. Cc COMMISSION ELECTROTECHNIQUE INTERNATIONALE (otise& VOrgrisation ntemationale de Noralieaton — 1S0) RECOMMANDATION DE LA CEI INTERNATIONAL ELECTROTECHNICAL COMMISSION {efflited tothe Interational Orgenizaton for Standardization — 1$0) HEC RECOMMENDATION Publication 113-1 Dewitme édtion — Seoond edition 1971 Schémas, diagrammes, tableaux Premlére partie: Définitions et classification Diagrams, charts, tables Part 1: Definitions and classification Dis de reproduction réservés — Copyright all ght reserved rts ney amor dg sting ed int ting om th aa, CO Bureau Central de la Commission Electrotechnique internationale 1, rue de Verembs Geneve, Suisse TEC VoL .to PhaesF, W——3- CONTENTS ForEWwoRD PREFACE Section Ons — GENERAL Clause 1, Scope 2. Definitions Section Two — CLASSIFICATION ACCORDING TO PURPOSE 3, Explanatory diagrams 4, Explanatory charts or tables 5. Witing diagrams or wiring tables . 6. Location diagrams or tables SECTION THREE — CLASSIFICATION ACCORDING TO METHOD OF REPRESENTATION Number of conductors ee ‘Arrangement of symbols. ‘ ee i eee Topographical representation Page n " 3TY —s— INTERNATIONAL ELECTROTECHNICAL COMMISSION DIAGRAMS, CHARTS, TABLES Definitions and classification FOREWORD 1) The formal decisions or agreements of the TEC on technical matters, prepared by Technical Committees on which all the ‘National Committees having a special interest therein are represented, express, as nearly as possible, an international consensus of opinion on the subjects dealt with, 2) They have the form of recomendations for international use and they are accepted by the Nation] Committers in that 3) In order to promote this international unification, the TEC expresses the wish that all National Committees having as yet no national rules, when preparing such rules, should use the IEC recommendations as the fundamental basis for Unese Tales in 30 far a8 national conditions will permit. 4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize national standardization rules with these recommendations in so far as national conditions will permit. The National ‘Committees pledge their influence towards that end. PREFACE ‘This Recommendation bas been prepared by TEC Technical Committee No. 3, Graphical Symbols ‘Technical Committee No. 3 has established a great number of Recommendations containing graphical symbols for use fon diagrams inthe field of electrotezhnology’ (cee IEC Publication 117, Recommended Graphical Symbols). After having Covered most of the needs for graphical symbols, with the exception of those for new fields of eleerotechnology still under Consideration, Technical Committee No. 3 found it advisable to supplement the symbol publications with Recommendations Tor the preparation of diagrams. “These Recommendations will include: definitions and classification of diagrams, charts and tables; guiding principles for use ‘and combination of graphical symbols; guiding principles for preparation of diagrams; guiding principles for supplementing or replacing diagrams by charts and tales; iter designation, etc These Recommendations willbe published separately under the general heading of I E C Publication 113, Diagrams, Charts, Tables. This Publication forms Part | of this series, Tt isa revision of Publication 113 (1959), the following modifications shaving been made: 1) Tables will in future replace diagrams and charts to an increasing extent. They have therefore been given more emphasis inthe text and are mentioned inthe title 2) Some of the allerative terms appearing in Pablication 113 have been omitted, eg. “elementary diagram”, “terminal connection diagram" and “one-line representatior 53) Some terms have been replaced by new ones, e.g. “schéma de raccordement aux bornes" by “schéma des bornes™, “repre entation rassemblée” by “repsésentation assembléc",“représentation semi-développée™ by “représentation rangée"” and “separated representation” by “detached representation 4) Two concepts have been inserted, ie. “location diagram or table" and “equivalent circuit diagram”. 5) A number of definitions have been clarified and some renumbering of clauses has been necessary The work on this revision was started in March 1968 and, as a result of the meeting held in London in 1968, a draft was submitted tothe National Committees for approval under the Six Months" Rule in March 1969, “The following countries voted explicitly in favour of publication of Pat I Australia Italy ‘Austria Japan Belgium ‘Netherlands Czechoslovakia Norway Deamark Poland Finland Sweden France Switzerland Germany ‘Turkey Iran United Kingdom Israel United States of America— 24 22 DIAGRAMS, CHARTS, TABLES Part 1: Definitions and classification SECTION ONE — GENERAL Scope ‘The purpose of this Recommendation is to define and to classify diagrams, charts and tables used in electrotechnology in order to explain functions or show connections and to give information for manufacture, installation and maintenance Two kinds of classification have been adopted: a) classification according to purpose; ) classification according to method of representation, Note, — In practice, the ype of diagram is determined by its purpose, the method(s) of representation being chosen Tor convenience. Definitions Diagram ‘A diagram may show the manner in which the various parts of a network, installation, group of apparatus or items of an apparatus are interrelated andjor interconnected, Chart A chart (U.S. graph) may show the interrelation between: 4a) different operations; 5) operations and times ) operations and physical quantities; d) the states of several items, Table A table replaces or supplements a diagram or a chart, SECTION TWO — CLASSIFICATION ACCORDING TO PURPOSE The main classifications are a) explanatory diagrams (Clause 3); b) explanatory charts or tables (Clause 4); ¢) wiring diagrams or wiring tables (Clause 5); d) location diagrams or tables (Clause 6). Explanatory diagrams Explanatory diagrams are intended to facilitate the study and understanding of the functioning of an installation or equipment. Three types are defined as follows,31 32 33 4a 42 Sul 53 Block diagram Relatively simple diagram to facilitate the understanding of the principle of operation. It is a diagram in which an installation or equipment together with its functional interrelationships are represented by symbols, block symbols or pictures without necessarily showing all the connections. Circuit diagram (U.S.A.: schematic diagram ) Explanatory diagram intended to facilitate the understanding of the functioning in detail. It shows by symbols an installation or part of an installation and the electrical connections and other links concerned with its operation. Equivalent circuit diagram Special type of circuit diagram for the analysis and calculation of circuit characteristics. ‘Explanatory charts or tables Explanatory charts or tables are intended to facilitate the study of diagrams and to give additional information. Two examples are: Sequence chart or table Gives the successive operations in a specified order. Time sequence chart or table Is one which in addition takes account of the time intervals between successive operations. ‘Wiring diagrams or wiring tables Wiring diagrams (U.S.A.: connection diagrams) are intended to guide the making and checking of the connections of an installation or equipment. For an equipment, they show the internal or external connections or both. The diagrams may sometimes show the layout of the different parts, and accessories such as terminal blocks and the wiring between them. Unit wiring diagram Diagram representing all connections within a unit of an installation. Interconnection diagram Diagram representing the connections between the different units of an installation. Terminal diagram Diagram showing the terminals and the internal andjor external conductors connected to them. Note, — Any of the witing diagrams (U'S.A.: connection diagrams) can be replaced or supplemented by a table.Location diagrams or tables 'A location diagram oF table contains detailed information about the location of parts of the equipment, eg terminal blocks, plug-in units, sub-assemblies, modules, ee. It shows the item designations used in related diagrams and tables. Note. — A location diagram need not necessarily be to seal pon refering to Clases 06. — Several types of diagrams may be combined into single dagram, forming a mixed "Tetrams The sare dravcing may form both an explanatory and wiring diagram. SECTION THREE — CLASSIFICATION ACCORDING TO METHOD OF REPRESENTATION 12 8 ‘The method of representation is distinguished by: 4a) the number of conductors, devices or elements represented by a single symbol (Clause 7); >) the arrangement of the symbols representing the elements or parts of an item of apparatus (es detached or assembled) (Clause 8); «) the placing of the symbols to correspond with the topographical layout of the devices (Clause 9), Number of conductors ‘According to the number of conductors, devices or elements represented by a single symbol, the following two methods of representation may be distinguished. ‘Single-line representation ‘Two or more conductors are represented by a single line. In particular, a single ine may represent: circuits of a multiphase system; ~ circuits which have a similar electrical function; — circuits or conductors which belong to the same signal path; — circuits which follow the same physical route; — Conductor symbols which would follow the same route on the diagram. Several similar items of apparatus may accordingly be represented by a single symbol ‘Multi-line representation Each conductor is represented by an individual line, Arrangement of symbols ‘According to the arrangement of the symbols representing the elements or Parts of an item of apparatus on the diagram, there are the following methods of representation. Assembled representation “The symbols for the different parts of an item of apparatus or of an installation or equipment are drawn in close proximity on the diagram.82 83 —B— Semi-assembled representation The symbols for the different parts of an item of apparatus or of an installation are separated and arranged in such a way that the symbols for mechanical linkages between the parts which work together may be drawn easily. Detached representation ‘The symbols for the different parts of an item of apparatus or of an installation are separated and arranged in such a way that the circuits may easily be followed. ‘Topographical representation ‘The positions of the symbols on the diagram correspond wholly or partly to the topographical (Physical) location of items represented. The following are examples where topographical representation can be used: — wiring diagrams; — architectural diagrams; — network diagrams. [Nore referring 10 Clauses 7 ro 9. — Several of these methods of representation may be used on the same diagram.COMMISSION ELECTROTECHNIQUE INTERNATIONALE (efflde Organisation Int tionale de Normalisation — 180) RECOMMANDATION DE LA GEL, INTERNATIONAL ELECTR OTECHNICAL COMMISSION (ctiisted tothe International Organization for Stendarizction — 180) LEC. RECOMMENDATION de modification N° 2 Juin 1959 4 la Publication 94 (Premiére & yn 1957) Recommandations relatives aux systémes d'enregistrement et de lecture sur bandes magnétiques: Dimensions La modification ci-aprés a 6t6 discutée par le Comité 'Etudes N29, & Stockholm en juillet 1988, et a été approu- vée sous la Ragle des Six Mois. Page Chapitre D: Equipement d'enregistrement et de lecture, Remplacer article D1.21 et le nota por ce qui suits D121 Sens d'enroulement de la bande sages professionnols Sila face supérieure d'une bobine se dletingue par tune marque, une étiquette ou une dissymétrie de cons- truction, la bande sera enroulée de telle manidre que pendant la reproduction elle pulse se dérouler en sens inverse des aiguilles d'une montre. Usages amateurs: ‘Aucune tecommandation, Droits de reproduction eéservds Amendment Sheet No. 2 June 1959 to Publication 94 (First edition-1957) Recommendations for magnetic tape recording and reproducing systems: Dimensions and characteristics, The following amendment, which was discussed by Tech- nical Committee No.29,in Stockholm in July 1958, has been approved under the Six Monthe' Rule. Page 7 Section D: Recording and reproducing equip- ment. Replace Clause D 1.21 end the note by the following: D121. Direction of tape winding For professional use. If the top surface of a spool is distinguished by markings, by a label or because of an asymmetrical construction, then the tape shall be wound in such a ‘way that during reproduction it may be unwound in an anticlockwise direction. For domestic u No recommendation is given, — Copyright all rights reserved Bureau Central de la Commission Electrotechnique Internationale ‘rue de Varembé Gendve, Suisse