Graphic symbols for electrical and electronics diagrams are presented in several standards, in groups. Have redundancy for practical work in instrumentation and automation.
Therefore, only the electrical and electronic elements most widely used in the instrumentation and automation are listed here, indicating the standard in which they are defined.
| GOST 2.721-74 General designations | |||
| Descripion | Designation | Descripion | Designation |
| Electric conductor, cable, wiring. | | Coaxial cable | |
| Ground, general symbol | | а) connected to the chassis | |
| Safety or protective ground | | б) grounded | |
| Chassis or frame connection | | Shielded line of electrical connection | |
| A group of electrical communication lines implemented by n twisted wires. For example, six twisted wires: | |||
| а) one-line | | б) multiline | |
| GOST 2.732-68 Lamps and Visual-Signaling Devices | |||
| Incandescent and signal lamp. General designation. | | The pulse light signaling lamp | |
| The illuminating and signal gas-discharge lamp. General designation | | Starter for discharge lamps | |
| GOST 2.755-87 Switches and Contact Connections | |||
| Switching contact: | |||
| 1) circuit closing | | 3) transfer | |
| 2) circuit opening | | 4) 3-position | |
| Thermal contact: | |||
| 1) normally open | | 2) normally closed | |
| Pushbutton: | |||
| 1) spring-return | | 2) double pressing return | |
| Switches: | |||
| Manual switch | | Temperature activated switch | |
| Single-pole multi-position switch | | An electromagnetic switch (relay) | |
| Plug-in contact: | |||
| - pin | | - female | |
| GOST 2.742-68 Electrochemical power sources | |||
| Galvanic element or accumulator | | The battery of electrochemical cells | |
| GOST 2.768-90 Electrochemical, electrothermal and thermal power sources | |||
| Galvanic cell (primary or secondary) | | Battery of galvanic cells | |
| Thermocouple | | Heat source, the basic symbol | |
| GOST 2.727-68 Arresters, fuses | |||
| Fuse | | Arrester | |
| GOST 2.756-76 Relay | |||
| Relay | | Activating device for thermally operated relay | |
| Type of electromechanical: | |||
| Relay, activated by current | | Relay, activated by voltage | |
| Coil, activated by max current | | Coil, activated by max voltage | |
| GOST 2.723-68 Inductors, chokes, transformers, autotransformers and magnetic amplifiers | |||
| The coil of the transformer, autotransformer, throttle and magnetic amplifier. | |||
| Type I | | Type II | |
| The magnetic circuit: | |||
| Ferromagnetic | | Magnetodielectric | |
| Inductor coil, adjustable with a magnetodielectric core | | Throttle with ferromagnetic core | |
| Transformers: | |||
| Transformer with a magnetic core | | Transformer, adjusted with a magnetic core | |
| Differential transformer (with tapping from the midpoint of the coil) | | Single-phase transformer with ferromagnetic core, triple-coil | |
| GOST 2.730-73 Semiconductors | |||
| Diodes, thyristors: | |||
| Semiconductor diode. General designation | | Voltage regulator diode | |
| Voltage regulator diode, bidirectional | | Varicap (capacitive diode) | |
| LED Light Emitting Diode | | Thyristor, bidirectional diode type | |
| Thyristor, diode type, conducting in the reverse direction | | Thyristor diode, locked in the reverse direction | |
| Thyristor diode symmetrical | | Thyristor triode. General designation | |
| Thyristor triode symmetrical (bi-directional) - triac | | Thyristor triode, conducting in the reverse direction | |
| Light Sensing Elements: | |||
| Photoresistor | | Photodiode | |
| Phototyristor | | PNP phototransistor | |
| NPN Phototransistor | | Photocell | |
| Optocouplers: | |||
| Optocoupler diode | | Optocoupler triac | |
| Optocoupler resistor | | Optocoupler transistor | |
| Single-phase bridge rectifier circuit: | |||
| а) detailed designation | | б) simplified designation | |
| Bipolar transistors: | |||
| PNP Transistor | | NPN Transistor | |
| PNIP transistor with ohmic connection to the intrinsic region | | NPN transistor with multiple emitters | |
| Field-effect transistors: | |||
| Field-effect transistor with N-channel | | Field-effect transistor with P-channel | |
| Field-effect transistors, insulated-gate: | |||
| P-channel insulated-gate | | N-channel insulated-gate | |
| P-channel insulated-gate | | N-channel insulated-gate | |
| GOST 2.728-74 resistors, capacitors | |||
| Resistors: | |||
| Resistor. General designation | | Adjustable resistor | |
| Variable resistor, rheostat | | Adjustable resistor | |
| Strain gage | | Varistor | |
| Thermistor, thermal resistor | | ||
| Capacitors: | |||
| Capacitor. General designation | | Polarized capacitor | |
| Electrolytic capacitors, non-polarized | | Adjustable or variable capacitor | |
| GOST 2.741-68 Acoustic Devices | |||
| Telephone | | Microphone | |
| Loudspeaker | | Electric siren | |
| Buzzer | | Electric siren | |
| Electric siren | | Electromagnetic ratchet | |