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close this bookCircuits, Formulas and Tables Electrical Engineering - Basic Vocational Knowledge
close this folder1. Selected Graphical Symbols of Electrotechnology
View the document1.1. Graphical Symbols for General Circuit Elements
View the document1.2. Graphical Symbols for Types of Current, Voltage and Connections
View the document1.3. Graphical Symbols for Lines and Line Connections
View the document1.4. Graphical Symbols for Resistors
View the document1.5. Graphical Symbols for Capacitors
View the document1.6. Graphical Symbols for Coils and Transformers
View the document1.7. Graphical Symbols for Current and Voltage Transformers
View the document1.8. Graphical Symbols for Electrochemical and Electrothermal Sources
View the document1.9. Graphical Symbols for Tubes
View the document1.10. Graphical Symbols for Semiconductors
View the document1.11. Graphical Symbols for Switching Devices
View the document1.12. Graphical Symbols for Machines
View the document1.13. Graphical Symbols for Meter Movements and Measuring Instruments
View the document1.14. Graphical Symbols of Electroacoustics
View the document1.15. Graphical Symbols for Wiring Plans

1.6. Graphical Symbols for Coils and Transformers

Term

Graphical Symbol


in full

simplified

Coils



general




or



air-cored coil




or



air-cored coil with two tappings

or



iron core



iron core and air gap



iron dust core



iron-core choke

or



Transformers



single-phase transformer with iron core (if errors cannot be made, the core need not be drawn)





single-phase transformer with iron-core and 3 windings (core not represented)



three-phase transformer in star-star connection (core not represented)



three-phase transformer, star-delta connection



three-phase autotransformer in star connection