Standard Ansi Electrical Symbols

Issue 1 sheet 2 of 40 doc no.

Standard ansi electrical symbols. One line diagrams 4 16 503 control and wiring diagrams 17 28 506 communication systems 29 510 power lay outs 30 38 520. Though these standard symbols are simplified the function descriptions can make you understand clearly. This publication also summarizes recommended drawing practices for electrical construction drawings. In the design of electrical power systems the ansi standard device numbers ansi ieee standard c37 2 standard for electrical power system device function numbers acronyms and contact designations identifies the features of a protective device such as a relay or circuit breaker these types of devices protect electrical systems and components from damage when an unwanted event occurs such.

In the design of electrical power systems the ansi standard device numbers denote what features a protective device supports such as a relay or circuit breaker. An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions such as wires batteries resistors and transistors in a schematic diagram of an electrical or electronic circuit these symbols are largely standardized internationally today but may vary from country to country or engineering discipline based on traditional conventions. Ansi ieee standard device numbers 1 master element 2 time delay starting or closing relay 3 checking or interlocking relay 4 master contactor 5 stopping device 6 starting circuit breaker 7 rate of change relay 8 control power disconnecting device 9 reversing device 10 unit sequence switch 11 multifunction device. Bn ds e2 document numbers index symbols page 501 502 key diagrams m.

Electrical design standard symbols. Electrical is used to include electrical electronic and communications systems covered by the national electrical code nfpa 70. Protection relay ansi standards. 3 ansi isa 5 1 2009 preface informative this preface is included for information purposes and is not part of ansi isa 5 1 2009.

American national standard canadian standard ieee standard graphic symbols for electrical and electronics diagrams including reference designation letters sponsor ansi y32 2 1975 csa z99 1975 ieee std 315 1975 revision of ansi y32 2 1972 csa z99 1972 ieee std 315 1971 ieee standards coordinating committee 11 graphic symbols. These types of devices protect electrical systems and components from damage when an unwanted event occurs such as an electrical fault. Electrical symbols virtually represent the components of electrical and electronic circuits. This standard has been prepared as part of the service of isa the international society of automation.