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As a profession, it is important to start with the basics of basic components and unit circuits, and it is important to build a solid foundation for the development of professional skills in the future.
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I think the difference between a maintenance electrician and an installation electrician, the maintenance electrician should master the following aspects, first, should be proficient in the use of multimeters, megohmmeters, electric pens and other electrical measurement tools, which is the basis of maintenance electricians, for beginners these should be mastered.
Second, we should know all kinds of basic electrical components, such as contactors, time relays, inverters (DC governors), PLC, as well as various switch buttons, emergency stop buttons, knobs, start-stop buttons and other electrical components.
Third, you should be able to understand the control circuit diagram of various relays, and it is best to practice assembling it yourself. For example, the motor forward and reverse circuit diagram, the motor forward and reverse circuit diagram, and the star delta starting circuit diagram.
Fourth, if you have mastered the above aspects, then congratulations, you can learn PLC, inverter, touch screen and other automation control theories, learning inverter and touch screen these work is best to have a master, but if not, it doesn't matter, inverter we only need to judge the meaning of the basic alarm of the inverter in the maintenance process, for example, OL generally indicates overload, OC generally indicates overcurrent, I said that these are general alarm indications of inverters, More specific to see the inverter manual, alarm processing plan, touch screen learning, it is recommended to read more touch screen application manual, the general touch screen manufacturers have such a manual, we can see more in the learning process.
Focus on the introduction of PLC, now there are many types of PLC, about the preliminary estimate can have dozens of brands, but the subdivision is European (Siemens, Schneider and other brands.
All rights reserved), American (AB and other brands), Japanese (Mitsubishi, Omron and other brands), so many brands, we don't know what to learn! My advice to everyone is to learn from Siemens, Mitsubishi, Omron, these three brands of PLC have a high market share in China, Mitsubishi is easy to get started, Siemens is difficult to get started. These are my opinions, to recommend to you I think it is a good book, electric drag, multimeter use from beginner to proficient (electrician learning network forum has an electronic version), electrician diagram and other basic electrician books, I think it is good.
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"Fundamentals of Electrical Technology" comprehensively and systematically introduces the basic knowledge and basic technology of electrical technology, closely combines basic theory with application, and pays attention to the practicality and frontier of knowledge.
The book is divided into 8 chapters, divided into 4 parts: basic theory and basic analysis methods of circuits, motors and electrical appliances, safe electricity use and electrical measurement, the main contents are the basic concepts and basic laws of circuits, circuit analysis methods, sinusoidal AC circuits, three-phase sinusoidal AC circuits, transient analysis of circuits, transformers, three-phase asynchronous motors, common control appliances, programmable controllers, power supply and safe electricity consumption of industrial enterprises and electrical measurements. Each chapter has exercises and answers to the exercises.
Fundamentals of Electrical Technology can be used as a professional textbook for electromechanical, automation, computer, automobile, electrical, electronic information and other professional textbooks in application-oriented undergraduate colleges and higher vocational colleges, and can also be used as a reference for engineering and technical personnel and self-learners.
The electrician's network access operation license is divided into three categories: low-voltage, high-voltage and special.
1. Those who have obtained the low-voltage electrician's network access operation license can be engaged in low-voltage operations such as electrical installation, maintenance and operation of voltage levels below 1,000 volts.
2. Those who have obtained the high-voltage electrician network access operation license can be engaged in electrical installation, maintenance, operation and other operations of all voltage levels.
3. Those who have obtained the special type of electrician network access operation license can engage in special operations such as electrical testing, secondary installation and commissioning, and cable operation on the power receiving device or power transmission device.
The electrician's network access operation permit shall be registered with the licensing authority. Registration is divided into initial registration and renewal registration, the registration is valid for 3 years, and the certificate can be collected at the examination unit 6 months after passing the theoretical and practical examinations.
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I majored in electrical engineering as an undergraduate, and I know some hope it will be helpful to you:
The main course "Circuit Theory", it seems that the automation major is also to be studied? However, the difficulty and depth were much greater, and we learned the English version at the time.
In terms of professional courses, I highly recommend "Fundamentals of Electrical Engineering", published by Huazhong University of Science and Technology Press, edited by Xiong Xinyin and Zhang Buhan (I have read many books, and I have not found a more complete and comprehensive detail so far).
Power System Analysis, Huazhong University of Science and Technology Press. This book may not be easy to find, but the Tsinghua version can be.
That's all for it, I don't know what you do, professional books are actually not very deep, Tsinghua version or higher education version can be.
High Voltage Technology", "Power Switch Technology", "Relay Protection", "Power Traction and Electric Transmission", "Detection Technology", "Single-chip Microcomputer Principle and Application", ......are all more important and can be prepared.
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According to work experience, engaged in electrical work, the most basic professional knowledge learning is the book "Fundamentals of Electrical Technology", I have been exposed to a number of versions, the content is basically similar, "Fundamentals of Electrical Technology" introduces the basic electrical theory, the general circuit is involved, motors, relay contact systems, electrical safety and other aspects are introduced.
If you just want to learn about electricity in daily life, you can consider buying books such as home improvement electricians, and books such as home appliance repair. Maintenance electricians junior and intermediate circuits in daily life are also introduced, and the books for junior workers are generally ** and lush, for beginners, it is easier to get started.
If you want to have an in-depth understanding of electricity, then you need to learn more things, such as the foundation of electronic technology, power electronics digital analog circuits, electrical control and PLC, microcontroller, C language, automatic control principles, HMI, microcomputer principles, and so on, and you need to have a foundation in advanced mathematics.
Electrician: refers to the study of the objective laws in the field of electromagnetism and the science and technology of its application, as well as the two major industrial production systems of power production and electrical manufacturing.
Electrician common sense: before decoration must have (strong current, weak electricity) construction drawings, and provide electrical engineering completion drawings when completed.
Electrical installation and construction personnel should be certified to work.
The wiring should be colored, the color of the phase line (L) should be unified, the neutral line (N) should be black, and the protection line (PE) must be yellow and green.
The appearance of plastic wire protection pipes and junction boxes should not be damaged or deformed.
The piping is generally 4 pipes (DN pipes (DN20), and the wall thickness of light pipes is 20, no more than 4 strings.
Ordinary electrical appliances are equipped with copper wires. High-power electrical appliances such as air conditioners need to be equipped with 4mm2 or 6mm2 copper wires.
Strong circuits and weak circuits are forbidden to be worn in the same sleeve.
The power supply, **, TV and other sockets in the same room should be at the same horizontal elevation, and the height difference should be less than 5mm.
When installing the lamp, all the design and installation fixing points of the lamp must be fixed.
The setting of the junction box in the ceiling: where there is a need for leads, wiring parts, the junction box needs to be set. And it should not be fixed on the wooden keel, but on the top.
When the installation of downlights requires openings, the position of the main attached keel should be verified to avoid cutting and damaging the keel.
Lighting fixtures should be installed separately switches, each lighting circuit should not exceed 2KW (excluding lanterns), combined lamps can be controlled in groups.
When ordinary chandeliers use soft wires to make their own hanging bodies. Only suitable for lamps with a mass of less than 1kg. Lamps and lanterns above 1kg must use a lifting chain, and the soft wire is not forced.
According to the position of the electrical equipment, the direction of the pipeline, the elevation and the position of the switch and the socket should be slotted after marking and positioning.
On the premise of not destroying the stressed steel bar, the depth of the wall (ground) groove ensures that the concealed pipeline oilman will not be exposed after repair.
When the length of the pipeline exceeds 15 m or there are two right-angle bends, a wire box should be added.
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1. "Fundamentals of Electrician".
Maintenance Electrician Primary", "Electrician Knowledge", "Power Plant Substation Electrical Equipment", "Electrical Equipment Maintenance Skills Training". The above books are published by China Electric Power Press, mechanical professional books and some mechatronics books, and I feel that it is necessary to obtain an electrician certificate.
Easy to learn electrical technology from scratch (2nd Edition)" is an introductory book of electrical technology, divided into 9 chapters, the main content of which is the installation and safe use of electrical foundations, electrical instruments, low-voltage electrical appliances, electronic components, transformers, motors, motor control circuits, indoor distribution lines.
Read some books about practical electrical circuit examples! It is better to have a comprehensive one, whether it is to learn to install electricians or maintenance electricians to learn in their own practical practice, but someone with the best, to have the spirit of not understanding to ask, there should be no problem, play a good role.
This industry is relatively special, and the state is to be verified and very formal. The best people are those who work in the factory, and it is okay to teach themselves, because they can be led by a master and can actually operate.
High-end ——- circuits, electronic technology fundamentals (digital and modular), engineering electromagnetic fields, electrical engineering, power engineering fundamentals, automatic control theory, power system (transient, steady-state) analysis, power system relay protection, power plant electrical main system, high voltage technology, PLC, computer control technology (single-chip microcomputer).
2. Find it in Xinhua Bookstore (easy to learn electrical technology from scratch), at least understand the lighting circuit. For example, two place control, three place control, day off light circuit, current calculation method, 220V and 380V calculation method are different, wire diameter selection. The selection of the size of the fuse switch socket, the electrical safety technology, and the lighting are understood, and the power control is commonly used in the factory, which is commonly used in the factory, and it is recommended that you read (electrical control and PLC).
It is not difficult to start from the basics, such as the protection of the motor, the forward and reverse rotation control of the motor, the star-delta step-down start, and the two motors are started and controlled successively. Automatic round-trip control, etc., the secondary circuit must be, many people on the construction site to do home improvement will not be the above secondary circuit, but also self-righteous, just get started to learn these first, learn these at the grassroots level is almost enough, but if you want to be a skilled worker who can afford others, you have to learn more, and then go one step deeper such as PLC, inverter, touch screen configuration monitoring, soft starter, servo controller, stepper motor control, sensor encoder, pneumatic transmission, Hydraulic transmission: These are the contents of factory automation control.
The above is low-voltage, if you want to do a good job in this line, high-voltage substation also has to be, most of the factory's substation is 10kv, there are also 35kv, 110kv, high-voltage electrician on duty should be able to switch operation, relay protection, analysis of on-site operation status, etc., it is recommended that you go to the power supply bureau to train electricians into the network operation permit.
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Electrician, plumber, basic knowledge, 8 years of experience summary of front-line masters, divided into 30 sections, let's take a look, what to learn:
1: Explanation of the details of home decoration and drainage (84 minutes).
2: Explanation of various practices of home improvement water supply (61 minutes).
3: Plumber and electrician look at the drawings to explain, floor plan and system diagram.
4: Explanation of the details of lofting in the early stage of home decoration and tooling.
5: Home decoration, tooling, water and electricity slotting details.
6: Home decoration, tooling plumber buried box details.
7: PVC line pipe various practices, in the face of different customers to choose different practices.
8: The relationship between 380 volts and 220 volts, the details of wire size selection 9: the details of the specific practices of home decoration and tooling lights.
10: Explain the details of the specific connection method of the lamp wire in the wire box.
11: Home decoration, tooling dual control, three control cable, wiring details 12: home decoration bathroom suite bath bomb line details explanation.
13: Home decoration, tooling early electrical box and line details explanation.
14: Explanation of the early functions and circuit details of the weak current box.
15: Explanation of the details of the slot after the completion of home decoration and tooling.
16: Explanation of the overall details of home decoration and tooling after the completion of the early stage.
17: Home decoration, tooling later switch, socket installation details.
18: Explanation of the details of the installation of the electrical box in the later stage of home decoration and tooling.
19: Detailed explanation of the installation of lamps and lanterns in the later stage of home decoration and tooling.
20: Detailed explanation of hardware and sanitary ware installation in the later stage of home decoration and tooling.
21: Detailed explanation of the details of home decoration and tooling after the completion of the later stage.
22: Detailed explanation of the practice of water and electricity in rental housing.
23: Comparison and explanation of the details of common 380 volt and 220 volt electric boxes 24: Explanation of details outside the drawings of tooling hot pot restaurants.
25: Explanation of the details of KBG pipe practice.
26: Calcium silicate board opening and size details of the ceiling.
27: A comprehensive explanation of hydropower materials.
28: Focus on the maintenance of large electrical boxes.
29: Common sense that plumbers must learn.
30: Explanation of the prospects of electricians and plumbers.
If you are not an rmb player, it is recommended that you change the sect Emei Xiaoyao Wudang Monk Tianshan is a popular sect now I am a level 107 Tianlong I feel that it burns money more than other sects Because the only way out of Tianlong is to reduce resistance And Tianlong and Xingshu are two major unpopular dungeons It is difficult to form a team That is to say, when you play Tianlong to an advanced level, you must have the consciousness of playing with yourself.
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