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hg607080.com Electrician quick start methods and steps

Electrician quick start methods and steps

Source: Time: 2020-03-11 03:10:17

Millennium Tongzhou vitality north stream

There are many books for electricians. Let me list you a few books about getting started with plumbers:
"Quick Start for Plumbers", "Quick Start for Plumbers Skills", "Practical Manual for Plumbers", "Quick Start for Electricians", "Budgets and Quotas for Hydropower Installation Projects", and "Electrician Tips" mainly introduce the electricians must The basic knowledge and basic skills mastered include the basic knowledge that electricians must master, the basic electronic knowledge that electricians should master, the use of common tools and precautions for electricians, and the use of common meters for electricians.
As a novice electrician, you may often feel confused and embarrassed. The knowledge of electricians is very wide, but you do not know where to start. So, I hope this article will help everyone in the "Electrician Learning Network" friends. Everything is difficult at the beginning. As long as you have a dream for life and persistent study, I believe that in the near future, you will be a qualified and excellent electrician.
Electricians are special operators, and safety always comes first. First of all, you must master the safety technical knowledge of electricians, the impact of current on the human body, and the related knowledge of electric shock first aid. Learn the safe operating procedures and safety technical regulations of electricians: 1 The zero line cannot enter the switch; 2 The power should be checked after power failure; 3 Wear protective equipment according to regulations; 4 Use insulated tools according to regulations; 5 Use multimeters and clamp ammeters correctly And megohmmeters.
Second, understand the basics of electrical engineering, such as current, voltage, resistance, power, load, switch, current conditions, Ohm's law, series circuit, parallel circuit, electric power and power, short circuit, open circuit, DC circuit, AC circuit, multimeter Wait. During the learning process, we can connect some simple lighting circuits, such as power supply, wires, switches, and loads, to the closed circuit. In this way, you can complete the lighting circuit, switching circuit, socket circuit, and household electricity can basically be solved.
Third, we must learn three-phase AC power. Three-phase AC power is more common in our factories. You need to master the basic working principles of buttons, contactors, circuit breakers, thermal relays, intermediate relays, and motors, and learn to correctly select the above components based on the motor current; master the method of judging a motor with a megohmmeter (shake meter); The multimeter measures the normally closed and normally open states of the above components (both normally open and normally closed refer to the non-energized state). Separate the main circuit and the control circuit (secondary circuit), learn a few more classic circuits, the start-stop circuit of the motor and the forward and reverse circuit of the motor, use actual components to connect the circuit, and learn to analyze the circuit to help you Quickly and accurately resolve the corresponding circuit fault.
Third, you must learn the use of time relays, counters, temperature controllers, proximity switches, various sensors, horseshoes, pneumatic components and other commonly used devices and relay control principles. For example, a time relay is used in the star-delta step-down startup. These components must not only understand the principle, but also learn to look at the diagram, and generally have a control wiring diagram. But remember the ever-changing history. After learning these, the general failures in the factory are solved.
Finally, it is the study of electronic circuits, inverters, and PLCs. With the rapid development of the electronics industry, the application of electronic products has become wider and wider. However, the learning of PLC has certain difficulties. You can learn PLC by yourself. Generally speaking, the basic instructions of PLC ladder diagram are easy to learn, and its logical relationship is similar to the relay control schematic diagram. But the function instructions are much more difficult. You can also come to "Electrician Learning Network / Electrician Forum". The electricalian forum has a full set of plc video tutorials (suggested to buy used PLC or cheap plc learning board for synchronous practice learning). You can join regular members for systematic learning and learn more systematically You can also pay more teachers and alumni for future development.
Electricians need to be supplemented by theoretical knowledge, based on actual operation, combining theory with practice, and solving practical problems as the root. For some friends who do not know how to read the drawings, there are several circuits in the main circuit of the general equipment. I suggest that you look at them all the way, such as the main motor circuit, first look at the main circuit, and then look at the secondary circuit corresponding to this main circuit. Compare the drawings. In order to understand its control principle, it is better to combine drawings and equipment working process, so it is easier to understand.

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