If you want to know about electrical symbols, who has the information?

Electricity covers a wide range, so its electrical symbols are also divided into multiple aspects. The breadth of the GB T 4728 series of standards for Graphic Symbols for Electrical Schematics is illustrated below. It should also be enough to choose the major you are involved in.

GB T Pictorial Symbols for Electrical Diagrams Part 1 General Requirements.

GB-T Pictorial Symbols for Electrical Schematics Part 2 Symbolic Elements, Qualifiers, and Other Commonly Used Symbols.

GB T Pictorial Symbols for Electrical Diagrams Part 3: Conductors and Connectors.

GB-T Pictorial Symbols for Electrical Diagrams Part 4: Basic Passive Components.

GB T Graphic Symbols for Electrical Schematic Diagram Part 5: Semiconductor Tubes and Tubes.

GB T Pictorial Symbols for Electrical Diagrams Part 6 Generation and Conversion of Electrical Energy.

Gb t Pictorial Symbols for Electrical Schematics Part 7 Switching, Control, and Protection Devices.

Graphic Symbols for Electrical Schematic Diagrams with GB T Part 8 Measuring Instruments, Lamps and Signal Devices.

GBT Pictorial Symbols for Electrical Schematics Part 9 Telecommunications: Switching and Peripherals.

Graphic Symbols for Electrical Schematic Diagrams of GB T Part 10 Telecommunications Transmission.

GB T Pictorial Symbols for Electrical Schematic Drawings Part 11 Floor Plan for Building Installation.

GBT Pictorial Symbols for Electrical Diagrams Part 12 Binary Logic Elements.

GB-T Pictorial Symbols for Electrical Schematics Part 13 Analog Components.

Suggestion, you can also look for this book. The content on electrical symbols is quite comprehensive.

Electrical Graphic Symbols, Text Symbols, Convenient Manual, Published by Chemical Industry Press, edited by Guo Ting.

Encyclopedia of Electrical Symbols. Available online.

<> this is the symbol of the voltage interchain dust sensor in the high-voltage power system.

The similar resistance part above (wire drawing) is the fuse of the high-voltage coil, commonly known as "high-voltage fuse stove".

The low-voltage coil contains two, one is Y-junction, which is used for voltage measurement, control, protection, metering, etc. of the high-voltage circuit, and its neutral point and the neutral point on the high-voltage side are connected together and grounded by nonlinear resistance.

The other secondary coil is connected to the "open triangle", as shown in the figure below

It is used to monitor the balance of the voltage of the three-shed Zen phase. When the three phases are perfectly symmetrical, the opening voltage output is zero; When the three phases are unbalanced, there is an output voltage in the opening.

From top to bottom, the horizontal line is the bus DU, and each vertical line that leads down from the bus is called a DAO outgoing line interval. Edition.

Take an outgoing interval as an example, from the top to the bottom, with two sharp corners to the book title number is the isolation switch (or isolation switch);

The diagonal "x" in the middle of the title number is the circuit breaker;

The four circles with vertical lines are transformers, and the diagram should be current transformer CT (one for each phase of A, B, and C, and one is a zero-sequence transformer);

The diagonal line on the left and the ground mass below the four circles are the grounding knife switch (or ground knife);

The group on the right, like the capacitor strip "ox", is lightning protection;

Just put the picture and see the comparison:

Basic Text Symbols].

Auxiliary Text Symbols

<> Classification of Graphic Symbols:

1. Qualified symbols and other commonly used symbols include: types of current and voltage, variability, direction of force or motion, direction of flow, action correlation of characteristic quantities, effect or correlation, radiation, radiation signal waveform, mechanical control, operation method, non-electric control, grounding and casing, etc.

2. The graphic symbols of wires and connecting devices include: the connection of wires, terminals and wires, connecting devices, cable accessories, etc.

3. Graphic symbols of passive components include: resistors, inductors, capacitors, etc.

4. Graphic symbols of semiconductors and electron tubes include: diodes, thyristors, optoelectronics, photosensitive devices, etc.

5. The graphic symbols of the generation and conversion of electric energy include: the limited symbol of the winding connection, the winding connected internally, the motor parts and types of transformers, reactors, arc suppression coils, braking resistors, series and supplementary capacitors, converters, galvanic batteries, etc.

6. Graphic symbols of switches, control and protection devices include: contact switches, switchgear and starters, with or without relays, measuring relays, fuses, gap arresters, etc.

7. The graphic symbols of measuring instrument lamps and signal devices include: indicating and recording instruments, telemetry devices, electric clocks, lamps, horns and electric bells, etc.

8. Telecom graphic symbols include: switching equipment, ** machine, transmission signal generator, converter, amplifier, optical fiber, optical cable, optical device, etc.

9. The graphic symbols of electric lighting and telecommunications layout include: power plants and substations, telecommunications bureaus and computer room facilities, lines, wiring, electricity, distribution boxes, control equipment, electrical equipment, sockets, switches and lighting lights, etc.

10. The graphic symbols of binary logic units include: limited symbols related to input and output and other connections, internal connection combination units and timing units, etc.

11. The symbols of the analog unit diagram include: the limited symbols for analog and digital signal identification, amplifiers, functional devices, signal converters, electronic switches, etc.

Next, Shanxi distribution cabinet manufacturer Jin Taiheng shares some common electrical symbols in the drawings of switchgear and distribution cabinets, remember to collect it!