1, look at the picture in combination with the basic knowledge of electrical and electronic technology;

2. Combining the structure and working principle of electrical components;

3. Combined with typical circuits, typical circuits are common basic circuits;

4. Look at the pictures in combination with relevant drawings;

5. Look at the drawings in combination with the drawing requirements of the electrical diagram.

After reading the drawings, we must read the sketches, so as to understand the general situation of the whole system or subsystem, that is, their basic composition, mutual relationship and main characteristics, and lay the foundation for further understanding of the work of the whole system or subsystem.

In order to further understand the working principle of the whole system or subsystem, it is necessary to look at the circuit diagram carefully. Circuit diagram is the core of electrical diagram, which is difficult to read. For complex circuit diagrams, we should first look at the related logic diagrams and functional diagrams.

Extended data:

It is drawn on the basis of the circuit diagram, so we should look at the wiring diagram against the circuit diagram. When you look at the wiring diagram, you should also look at the main circuit first, and then at the control circuit. Look at the wiring diagram according to the terminal signs and loop labels, and check from the power supply side, so as to find out the direction of the circuit and the connection mode of the circuit, that is, to find out how each component forms a closed loop through wiring.

Looking at the main circuit is different from looking at the circuit diagram, starting from the power input end, passing through the control elements and circuits in turn to the electrical equipment. When looking at the control circuit, we should analyze each loop from one end of the power supply to the other end of the power supply in the order of components.

The wire number in the wiring diagram is the mark of the connection between wires of electrical components, and wires with the same wire number can be connected together in principle. Because the wiring diagram is mostly represented by a single line, it is necessary to distinguish the direction of the wires and make clear the connection between the internal and external circuits of the terminal board.

Baidu encyclopedia-electrician map