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IEEE Standard for Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), 1975
- Title page
- Participants
- Foreword
- CONTENTS
- Quick Reference to Symbols
- Introduction
- A1 Scope [Go to Page]
- A.1.1 Purpose
- A1.2 Definition and Use
- A2 Arrangement [Go to Page]
- A2.1 Indexing, Grouping, and Standard Item Names
- A2.2 Significance of Columnar Placement of Symbols
- A2.3 IEC Identification
- A2.4 Alternative Symbols
- A3 Application [Go to Page]
- A3.1 Generation of Symbols Not Shown (Buildups)
- A3.2 Qualifying Symbols (Section 1)
- A3.3 Application Data Reference
- A3.4 Graphic Symbols and Class Designation Letters Used in Existing Technical Documents
- A3.5 Similar or Identical Graphic Symbols, Letter Combinations, and Notations
- A4 Drafting Practices Applicable to Graphic Symbols [Go to Page]
- A4.1 Definitions
- A4.2 Orientation
- A4.3 Line Width
- A4.4 Enlargement or Reduction
- A4.5 Relative Symbol Size
- A4.6 Arrowheads
- A4.7 Terminal Symbols
- A4.8 Correlation of Symbol Parts
- A4.9 Angle of Connecting Lines
- A4.10 Future or Associated Paths and Equipment
- A4.11 Envelope or Enclosure
- A4.12 Addition of Supplementary Data
- 1. Qualifying Symbols [Go to Page]
- 1.1 Adjustability, Variability
- 1.2 Special-Property Indicators
- 1.3 Radiation Indicators (electromagnetic and particulate
- 1.4 Physical State Recognition Symbols
- 1.5 Test-Point Recognition Symbols
- 1.6 Polarity Markings
- 1.7 Direction of Flow of Power, Signal, or Information
- 1.8 Kind of Current (General)
- 1.9 Connection of Symbol
- 1.10 Envelope, Enclosure
- 1.11 Shield, Shielding
- 1.12 Special Connector or Cable Indicator
- 1.13 Electret (shown with electrodes)
- 2. Graphic Symbols for Fundamental Items (not included in other sections) [Go to Page]
- 2.1 Resistor
- 2.2 Capacitor
- 2.3 Antenna
- 2.4 Attenuator
- 2.5 Battery
- 2.6 Delay Function, Delay Line, Slow-Wave Structure
- 2.7 Oscillator, Generalized Alternating-Current Source
- 2.8 Permanent Magnet
- 2.9 Pickup, Head
- 2.10 Piezoelectric Crystal Unit (including Crystal Unit, Quartz)
- 2.11 Transducer, Accelerometer, Motional Pickup Transducer
- 2.12 Squib, Electric
- 2.13 Thermocouple (dissimilar-metals device)
- 2.14 Thermal Element, Thermomechanical Transducer
- 2.15 Spark Gap, Igniter Gap
- 2.16 Continuous Loop Fire Detector (temperature sensor)
- 2.17 (Ignitor Plug)
- 3. Graphic Symbols for Transmission Path [Go to Page]
- 3.1 Transmission Path, Conductor, Cable, Wiring
- 3.2 Distribution Lines, Transmission Lines
- 3.3 Alternative or Conditional Wiring
- 3.4 Associated or Future
- 3.5 Intentional Isolation of Direct-Current Path in Coaxial or Waveguide Applications
- 3.6 Waveguides
- 3.7 Strip-Type Transmission Line
- 3.8 Termination
- 3.9 Circuit Return
- 3.10 Pressure Tight Bulkhead Cable Gland, Cable Sealing End
- 4. Graphic Symbols for Contacts, Switches, Contactors, and Relays [Go to Page]
- 4.1 Switching Function
- 4.2 Electrical Contact
- 4.3 Basic Contact Assemblies
- 4.4 Magnetic Blowout Coil
- 4.5 Operating Coil, Relay Coil
- 4.6 Switch
- 4.7 Pushbutton, Momentary or Spring-Return
- 4.8 Two-circuit, Maintained or Not Spring-Return
- 4.9 Nonlocking Switch, Momentary or Spring-Return
- 4.10 Locking Switch
- 4.11 Combination Locking and Nonlocking Switch
- 4.12 Key-Type Switch, Lever Switch
- 4.13 Selector or Multiposition Switch
- 4.14 Limit Switch, Sensitive Switch
- 4.15 Safety Interlock
- 4.16 Switches with Time-Delay Feature
- 4.17 Flow-Actuated Switch
- 4.18 Liquid-Level-Actuated Switch
- 4.19 Pressure- or Vacuum-Actuated Switch
- 4.20 Temperature-Actuated Switch
- 4.21 Thermostat
- 4.22 Flasher, Self-Interrupting Switch
- 4.23 Foot-Operated Switch, Foot Switch
- 4.24 Switch Operated by Shaft Rotation and Responsive to Speed or Direction
- 4.25 Switches with Specific Features
- 4.26 Telegraph Key
- 4.27 Governor (Contact-making), Speed Regulator
- 4.28 Vibrator, Interruper
- 4.29 Contactor
- 4.30 Relay
- 4.31 Inertia Switch (operated by sudden deceleration)
- 4.32 Mercury Switch
- 4.33 Aneroid Capsule (air pressure) Operated Switch
- 5. Graphic Symbols for Terminals and Connectors [Go to Page]
- 5.1 Terminals
- 5.2 Cable Termination
- 5.3 Connector, Disconnecting Device, Jack, Plug
- 5.4 Connectors of the Type Commonly Used for Power-Supply Purposes
- 5.5 Test Block
- 5.6 Coaxial Connector, Coaxial Junction
- 5.7 Waveguide Flanges, Waveguide Junction
- 6. Graphic Symbols for Transformers, Inductors, and Windings [Go to Page]
- 6.1 Core
- 6.2 Inductor, Winding (machine or transformer), Reactor Radio-Frequency Coil
- 6.3 Transductor, Saturable-Core Inductor, Saturable-Core Reactor
- 6.4 Transformer, Telephone Induction Coil, Telephone Repeating Coil
- 6.5 Linear Coupler
- 7. Graphic Symbols for Electron Tubes and Related Devices [Go to Page]
- 7.1 Electron Tube
- 7.2 General Notes
- 7.3 Typical Applications
- 7.4 Solion, Ion-Diffusion Device
- 7.5 Coulomb Accumulator, Electrochemical Step-Function Device
- 7.6 Conductivity Cell
- 7.7 Nuclear-Radiation Detector (gas-filled), Ionization Chamber, Proportional Counter Tube, Geiger-Müller Counter Tube
- 8. Graphic Symbols for Semiconductor Devices [Go to Page]
- 8.1 Semiconductor Device, Transistor, Diode
- 8.2 Element Symbols
- 8.3 Special-Property Indicators
- 8.4 Rules for Drawing Style 1 Symbols
- 8.5 Typical Applications, Two-Terminal Devices
- 8.6 Typical Applications, Three- (or more) Terminal Devices
- 8.7 Photosensitive Cell
- 8.8 Semiconductor Thermocouple
- 8.9 Hall Element, Hall Generator
- 8.10 Photon-Coupled Isolator
- 8.11 Solid-State Thyratron (replacement type)
- 9. Graphic Symbols for Circuit Protectors [Go to Page]
- 9.1 Fuse (one-time thermal current-overload device)
- 9.2 Current Limiter (for power cable)
- 9.3 Lightning Arrester, Arrester (electric surge, etc.), Gap
- 9.4 Circuit Breaker
- 9.5 Protective Relay
- 10. Graphic Symbols for Acoustic Devices [Go to Page]
- 10.1 Audible-Signaling Device
- 10.2 Microphone, Telephone Transmitter
- 10.3 Handset, Operator’s Set
- 10.4 Telephone Receiver, Earphone, Hearing-Aid Receiver
- 11. Graphic Symbols for Lamps and Visual-Signaling Devices [Go to Page]
- 11.1 Lamp
- 11.2 Visual-Signaling Device
- 12. Graphic Symbols for Readout Devices [Go to Page]
- 12.1 Meter
- 12.2 Electromagnetically Operated Counter, Message Register
- 13. Graphic Symbols for Rotating Machinery [Go to Page]
- 13.1 Rotating Machine
- 13.2 Field, Generator or Motor
- 13.3 Winding Connection Symbols
- 13.4 Applications: Direct-Current Machines
- 13.5 Applications: Alternating-Current Machines
- 13.6 Applications: Alternating-Current Machines with Direct-Current Field Excitation
- 13.7 Applications: Alternating- and Direct-Current Composite
- 13.8 Synchro
- 14. Graphic Symbols for Mechanical Functions [Go to Page]
- 14.1 Mechanical Connection, Mechanical Interlock
- 14.2 Mechanical Motion
- 14.3 Clutch, Brake
- 14.4 Manual Control
- 15. Graphic Symbols Commonly Used in Connection with VHF, UHF, SHF Circuits [Go to Page]
- 15.1 Discontinuity (Introducing intentional wave reflection)
- 15.2 Coupling
- 15.3 Directional Coupler
- 15.4 Hybrid, Directionally Selective Transmission Devices
- 15.5 Mode Transducer
- 15.6 Mode Suppressor
- 15.7 Rotary Joint (radio-frequency rotary coupler)
- 15.8 Nonreciprocal Devices
- 15.9 Resonator, Tuned Cavity
- 15.10 Resonator (cavity-type) Tube
- 15.11 Magnetron
- 15.12 Velocity-Modulation (velocity-variation) Tube
- 15.13 Transmit-Receive (TR) Tube
- 15.14 Traveling-Wave-Tube
- 15.15 Balun
- 15.16 Filter
- 15.17 Phase Shifter (matched)
- 15.18 Ferrite Bead Ring
- 15.19 Line Stretcher (with female connectors shown)
- 16. Graphic Symbols for Composite Assemblies [Go to Page]
- 16.1 Circuit Assembly, Circuit Subassembly, Circuit Element
- 16.2 Amplifier
- 16.3 Rectifier
- 16.4 Repeater (includes Telephone Repeater)
- 16.5 Network, Artificial Line (other than delay line)
- 16.6 Phase Shifter, Phase-Changing Network
- 16.7 Chopper
- 16.8 Diode-Type Ring Demodulator, Diode-Type Ring Modulator
- 16.9 Gyro, Gyroscope, Gyrocompass
- 16.10 Position Indicator
- 16.11 Position Transmitter
- 16.12 Fire Extinguisher Actuator Heads
- 17. Graphic Symbols for Analog and Digital Logic Functions [Go to Page]
- 17.1 Operational Amplifier
- 17.2 Summing Amplifier
- 17.3 Integrator (Amplifier)
- 17.4 Electronic Multiplier
- 17.5 Electronic Divider
- 17.6 Electronic Function Generator
- 17.7 Generalized Integrator
- 17.8 Positional Servomechanism
- 17.9 Function Potentiometer
- 18. Graphic Symbols for Digital Logic Functions [Go to Page]
- 18.1 Digital Logic Functions
- 19. Graphic Symbols for Special-Purpose Maintenance Diagrams [Go to Page]
- 19.0 Introduction
- 19.1 Data-Flow Code Signals
- 19.2 Functional Circuits
- 20. Graphic Symbols Commonly Used on System Diagrams, Maps, and Charts [Go to Page]
- 20.1 Radio Station
- 20.2 Space Station
- 20.3 Exchange Equipment
- 20.4 Telegraph Repeater
- 20.5 Telegraph Equipment
- 20.6 Telephone Set
- 21. Graphic Symbols Commonly used on System Diagrams, Maps, and Charts [Go to Page]
- 21.1 Generating Station
- 21.2 Hydroelectric Generating Station
- 21.3 Thermoelectric Generating Station
- 21.4 Prime Mover (qualifying symbols)
- 21.5 Substation
- 22. Class Designation Letters [Go to Page]
- 22.1 Class Designation Letter
- 22.2 Special Considerations for Class Designation Letter Assignment
- 22.3 Item Names
- 22.4 Class Designation Letters: Alphabetical List
- 22.5 Item Names: Alphabetical List
- 22.6 Item Designations, IEC 113-2
- 23. Referenced Standards and Canadian Standard Z99 Modifications [Go to Page]
- 23.1 Referenced Standards
- 100 Canadian Standard Z99 Modifications to American National Standard Y-32.2-1975 (IEEE Std 315-1975)
- Annex A Cross Reference List of Changed Item Numbers
- Annex B Reference Data International Electrotechnical Commission (IEC) Publication 117" Recommended Graphical Symbols
- Annex C Revised or Deleted Symbols
- Annex D Revised or Deleted Symbols
- Annex E Revised or Deleted Symbols
- Annex F Cross-Reference List of Class Designation Letters
- IEEE STD 315A-1986
- Foreword
- Participants
- CONTENTS
- AA1 Purpose
- AA2 Scope
- AA3 Organization
- AA4 References
- 1. Qualifying Symbols [Go to Page]
- 1.1 Adjustability, Variability
- 1.2 Special-Property Indicators
- 1.3 Radiation Indicators (electromagnetic and particulate)
- 1.4 Physical State Recognition Symbols
- 1.7 Direction of Flow of Power, Signal, or Information
- 1.8 Kind of Current
- 1.10 Envelope, Enclosure
- 1.14 Operational Dependence On a Characteristic Quantity
- 1.15 Signal Identifiers
- 1.16 Signal Waveforms
- 1.17 Control by Nonelectrical Quantities
- 2. Graphic Symbols for Fundamental Items (not included in other sections) [Go to Page]
- 2.1 Resistor
- 2.2 Capacitor
- 2.3 Antenna
- 2.4 Attenuator
- 2.6 Delay Function, Delay Line, Slow-Wave Structure
- 2.9 Pickup, Head
- 2.10 Piezoelectric Crystal Unit (including Crystal Unit, Quartz
- 2.17 Ignitor Plug
- 2.18 Signal Waveforms
- 2.19 Faults
- 3. Graphic Symbols for Transmission Path [Go to Page]
- 3.1 Transmission Path, Conductor, Cable, Wiring
- 3.2 Distribution Lines, Transmission Lines
- 3.6 Waveguide
- 3.10 Pressure Tight Bulkhead Cable Gland, Cable Sealing End
- 4. Graphics Symbols for Contacts, Switches, Contactors, and Relays [Go to Page]
- 4.1 Switching Function
- 4.3 Basic Contact Assemblies
- 4.6 Switch
- 4.14 Limit Switch, Sensitive Switch
- 4.21 Thermostat
- 4.22 Flasher, Self-Interrupting Switch
- 4.29 Contactor
- 4.34 Multipole and Multiposition Switches
- 4.35 Switchgear and Controlgear
- 4.36 Block Symbols for Motor Starters
- 4.37 Operating Devices for Electromechanical (all or nothing), Relays
- 5. Graphic Symbols for Terminals and Connectors [Go to Page]
- 5.3 Connector, Disconnecting Device, Jack, Plug
- 5.6 Coaxial Connector, Coaxial Junction
- 6. Graphic Symbols for Transformers, Inductors, and Windings [Go to Page]
- 6.1 Core
- 6.2 Inductor, Winding (machine or transformer), Reactor, Radio-Frequency Coil, Telephone Retardation Coil
- 6.4 Transformer, Telephone Induction Coil, Telephone Repeating Coil
- 6.6 Ferrite Cores—Symbol Elements
- 6.7 Ferrite Cores
- 6.8 Magnetic Storage Matrices (Topographical Representation)
- 7. Graphic Symbols for Electron Tubes and Related Devices [Go to Page]
- 7.1 Electron Tube
- 7.3 Typical Applications
- 7.4 Solion, Ion-Diffusion Device
- 7.5 Coulomb Accumulator, Electrochemical Step-Function Device
- 7.7 Nuclear-Radiation Detector, Ionization Chamber, Proportional Counter Tube, Geiger-Müller Counter Tube
- 8. Graphic Symbols for Semiconductor Devices [Go to Page]
- 8.2 Element Symbols
- 8.3 Special-Property Indicators
- 8.5 Typical Applications, Two-Terminal Devices
- 8.6 Typical Applications, Three- (or more) Terminal Devices
- 8.10 Photon-Coupled Isolator
- 8.12 Ionizing Radiation Detectors
- 9. Graphic Symbols for Circuit Protectors [Go to Page]
- 9.1 Fuse
- 9.3 Lightning Arrester, Arrester (electric surge, etc), Gap
- 9.4 Circuit Breaker
- 9.6 Protective Relays—Block Symbols and Qualifying Symbol
- 9.7 Examples of Protective Relays
- 9.8 Other Relays Devices
- 10. Graphic Symbols for Acoustic Devices [Go to Page]
- 10.1 Audible-Signaling Device
- 11. Graphic Symbols for Lamps and Visual-Signaling Devices [Go to Page]
- 11.1 Lamp
- 11.3 Electromechanical Signal
- 12. Graphic Symbols for Readout Devices [Go to Page]
- 12.1 Meter, Instrument
- 12.2 Electromagnetically Operated Counter, Message Register
- 12.3 Indicating, Recording, and Integrating Instruments, General Symbols
- 12.4 Examples of Indicating Instruments
- 12.5 Examples of Recording Instruments
- 12.6 Examples of Integrating Instruments
- 12.7 Counting Devices
- 12.8 Telemetering Devices
- 12.9 Electric Clocks
- 13. Graphic Symbols for Rotating Machinery [Go to Page]
- 13.1 Rotating Machine
- 13.5 Applications: Alternating-Current Machines
- 13.6 Applications: Alternating-Current Machines with Direct-Current Field Excitation
- 14. Graphic Symbols for Mechanical Functions [Go to Page]
- 14.2 Mechanical Motion
- 14.3 Clutch, Brake
- 14.4 Manual Control
- 14.5 Detents, Latching, and Blocking
- 15. Graphic Symbols for Commonly Used in Connection with VHF, UHF, and SHF Circuits [Go to Page]
- 15.2 Coupling
- 15.4 Hybrid, Directionally Selective Transmission Devices
- 15.5 Mode Transducer
- 15.6 Mode Suppressor
- 15.7 Rotary Joint (radio-frequency rotary coupler )
- 15.8 Nonreciprocal Devices
- 15.9 Resonator, Tuned Cavity
- 15.10 Resonator (cavity-type) Tube
- 15.11 Magnetron
- 15.12 Velocity-Modulation (velocity-variation) Tube
- 15.13 Transmit-Receive (TR) Tube
- 15.14 Traveling-Wave-Tube
- 15.16 Filter
- 15.20 Multiport Devices
- 15.21 Lasers and Masers
- 16. Graphic Symbols for Composite Assemblies [Go to Page]
- 16.1 Circuit Assembly, Circuit Subassembly, Circuit Element
- 16.2 Amplifier
- 16.9 Gyro, Gyroscope, Gyrocompass
- 16.13 Changer, General Symbol—Converter General Symbol
- 16.14 Galvanic Seperator
- 16.15 Heat Source, General Symbol
- 16.16 Generator, General Symbol
- 16.17 Sensors and Detectors
- 16.18 Applications of Sensors
- 17. Graphic Symbols for Analog and Digital Logic Functions [Go to Page]
- 17.10 Analog Elements for Computations and Control
- 20. Communication Equipment [Go to Page]
- 20.3 Exchange Equipment (Relocation of 20.3.2 and 20.3.3)
- 21. Graphic Symbols Commonly Used on System Diagrams, Maps, and Charts [Go to Page]
- 21.1 Generating Station
- 21.2 Hydroelectric Generating Station
- 21.3 Thermoelectric Generating Station
- 21.4 Prime Mover (qualifying symbols)
- 21.5 Substation
- 21.6 Wind Generating Station
- 21.7 Plasma Generating Station
- 24. Telecommunications Switching and Peripheral Equipment [Go to Page]
- 24.1 Switching Systems
- 24.2 Block Symbols for Switching Equipment
- 24.3 Qualifying Symbols for Transducers, Recorders, and Reproducers
- 24.4 Recorders and Reproducers
- 25. Telecommunications Transmission [Go to Page]
- 25.1 Amplified Circuits
- 25.2 Qualifying Symbols for Pulse Modulation
- 25.3 Signal Generator, Waveform Generator
- 25.4 Changers, Converter, General Symbol
- 25.5 Filters
- 25.6 Networks
- 25.7 Electronic Chopping Device
- 25.8 Threshold Devices
- 25.9 Terminating Sets
- 25.10 Modulator, Demodulator, Discriminator
- 25.11 Concentrators, Multiplexers
- 25.12 Frequency Spectrum Diagram Symbol Elements
- 25.13 Examples of Frequency Spectrum Diagrams
- 25.14 Fiber Optic Devices [Go to Page]