This article shows many of the frequently used electrical symbols for drawing electrical diagrams. If a line touching another line has a black dot it means the lines are connected.
Rules And Guidelines For Drawing Good Schematics Electrical
Electrical schematic drawing standards. Electrical symbols virtually represent the components of electrical and electronic circuits. The exact size is a little different all around the world but they are all roughly what you can easily hold in front of you or place on your desk. Basics 10 480 v pump schematic. For example a switch will be a break in the line with a line at an angle to the wire much like a light switch you can flip on and off. It is possible that products from all parts of the world are being used in any one facility. Symbols and abbreviations for electrical and electronics drawings to which the us.
The electrical standards adopted by various nations may vary the markings and symbols used to describe electrical control products vary as well. When unconnected lines are shown crossing youll see a line hop. Basics 9 416 kv pump schematic. When formed this subcommittee was charged with the responsi bility of preparing a drafting standard covering electrical schematic wiring and block diagrams for use in the communications electronic electric power indus trial control telephone telegraph and allied industries a natural addition to this scope was. Basics 7 416 kv 3 line diagram. Basics 11 mov schematic with block included basics 12 12 208 vac panel diagram.
35 company standards for drawings 72 36 summary 73 4 single line and three line diagrams 75 41 purpose 75 42 typical examples 77 43 the differences between single line and the 3 line diagram 83 44 applications 84 45 conventions 85 46 summary 90 exercises 91. Handling larger paper is a hassle. Whether it is a complex control system on a machine tool or a simple across the line motor starter the need to recognize and understand these symbols becomes more important. When reaffirmation amendment. Basics 13 valve limit switch legend. A resistor will be represented with a series of squiggles symbolizing the.
There isnt room on the desk it ends. Most people only have access to regular page size printers like for 8 12 x 11 inch paper here in the us. The purpose of this document is to provide a simple cross reference of common. There is a reason this size evolved as a standard. When reaffirmations amendment revision or cancellation of this standard is proposed which will effect or violate the international agreement concerned the military coordinating activity will take appropriate reconcilliation action through military international standardization channels including departmental standardization offices if required. Basics 6 72 kv 3 line diagram.
Installation drawings and diagrams 63 general information about diagrams and plans 63 parts components and spare parts lists 69 technical drawing 73 drawing formats 73 drawing header and title block 73 reference grid 74 conductors 74 lines and line thicknesses 74 connecting lines 75 symbols 83 graphical representation and overview of symbols 83 non standardized symbols 86 symbol size and shape 86. Basics 8 aov elementary block diagram. Basics 14 aov schematic with block included. The standard electrical symbols are smart industrial standard and vector based for electrical schematic diagrams. To make it possible for interested users to get detailed knowledge about electrical norms and drawing standards pcschematic has created the book electrical documentation according to standards in cooperation with a board of professionals. Though these standard symbols are simplifiedthe function descriptions can make you understand clearly.
The days of electrical engineers having drafting tables and being set up to work with d size drawings are long gone. Most symbols used on a wiring diagram look like abstract versions of the real objects they represent. Below lists most commonly used electrical and electronic symbols that can help you. Standard wiring diagram symbols. 5 schematic diagrams 93 51 purpose 93 52 typical examples 94 53 control devices electromechanical relays and contactors 97 54 use of symbols 100 55 applications 102 56 schematics spread over a number of sheets 103 57. The book is written by pcschematic and the english version has been available since 2004 and has been updated when necessary.
Introduction and contents electrical documentation according to standards page 7 symbols and. The book is also available in danish czech and polish. Subcommittee 15 electrical and electronic diagrams was formed on april 26 1964 as a subcommittee of sectional committee yl4 standards for draw ings and drafting.
Gallery of Electrical Schematic Drawing Standards
