Where to learn to be a self taught electrician?

For beginners, you must start with the basic knowledge of electrician, and it is recommended to buy a basic professional book on electrician. You can also read some of the university's electrical engineering teachings online**. The basic theory is very important, and the various control theories of electrical power must be understood.

It's okay to master system theory in about a year.

If you are new to the electrician industry, you need to take the electrician certificate.

The electrician certificate is now the entry certificate of the electrician industry, and if you want to engage in the electrician industry, you need to have an electrician certificate. At present, I go to the training class to study, and the training and certification time varies from place to place, generally about three months.

The course is different, the training content is different, and the final training time is also different, please choose the training course that suits you according to the specific arrangement of the training course.

Electricians are not only skilled workers, but also special operations personnel, skilled workers with entry thresholds, and they are not just casual workers.

Electricians must be certified to work:

That is to say, it is necessary to take the electrician professional qualification certificate and the electrician operation certificate. The professional qualifications of electricians are divided into junior workers, intermediate workers, senior workers, technicians, and senior technicians. The higher the level, the better the skills and the stronger the problem-solving skills.

Electricians must have theoretical knowledge and operational skills

As an electrician, you need to know the knowledge of safe electricity use, motors and transformers, low-voltage electrical appliances, electrical and electronic technology, electrical control knowledge, and some PLC knowledge. In this way, you will be able to pass the theory exam.

At the same time, you must have the corresponding operation skills, basic wiring skills, installation and commissioning of basic circuits, installation and maintenance of basic electrical appliances, installation and maintenance of some electrical equipment, etc. In order to pass the practical exam.

Therefore, electricians are not easy to be done, and electricians are skilled talents with high technical content.

Automotive circuits are composed of power supplies, switches, electrical appliances, and various wires. The automotive circuit is a low-voltage power supply, and there are two general voltages: 12V and 24V.

The automobile circuit is a DC power supply mainly from the battery and the generator to take electricity, the line on the car is a single-wire system, all the electrical equipment on the car is in parallel, the car engine, chassis and other metal bodies, as a variety of electrical appliances of the common circuit, from the electrical appliances to the power supply only one wire; The automobile circuit adopts the negative pole tie iron method.

All kinds of electrical equipment on the car are connected to the power supply in parallel, and each electrical equipment has its own special switch control in series in its branch, which does not interfere with each other.

In order to prevent electrical circuits or components from burning out wiring harnesses and electrical equipment due to iron lapping or short circuits, safety devices are installed on various types of automobiles. Some of these fuses are connected in series in the component (or component) circuit, and some are connected in series in the branch circuit.

Note: In the car, often a wiring harness is wrapped with a dozen or even dozens of wires, dense and difficult to distinguish their direction, plus electricity is invisible and intangible, so the car circuit is a very complex thing for many people. But everything has its regularity, and automotive circuits are no exception.

Generally, household electricity is used for alternating current, and the parallel circuit of the two-wire system is implemented, and the electrical appliances have at least two external power cords. From the point of view of the automobile circuit, the negative electrode wire (return line) drawn from the load (electrical appliance) should be directly connected to the negative terminal post of the battery, if such wiring method is adopted, then the wire connected to the negative terminal post of the battery will be as many as hundreds.

In order to avoid this, the designers used the metal frame of the car body as the negative pole of the circuit, such as the girder. Therefore, the automobile circuit is significantly different from the general household electricity: the automobile circuit is all direct current, the parallel circuit of the single-wire system is implemented, and the electrical appliances only need to have an external power cord.

Both the negative and load terminals of the battery are connected to a metal frame, which is called "grounding". In this way, the negative wire drawn from the load can be connected nearby, and the current flows back to the negative wire of the battery through the metal frame.

With the increasing application of non-metallic materials such as plastic parts in automobiles, many cars now use public grounding network harnesses to ensure the reliability of grounding, that is, the negative wire of the load is connected to the grounding network harness, and the grounding network harness is connected to the negative electrode of the battery.

The automobile circuit implements a single-wire parallel circuit, which is generally viewed, and there are still series, parallel and mixed circuits in the local circuit. In fact, the whole car circuit is composed of various circuits, and each circuit can be listed independently, turning complexity into simplicity.

According to the basic use, the whole vehicle circuit can be divided into lighting, signal, instrument, starting, ignition, charging, auxiliary and other circuits. Each circuit has its own load wire to connect to the control switch or fuse box.

"Learning electricians from scratch" refers to people who do not have a little foundation in electricians, learn the theory and practical knowledge of electricians from scratch, step by step, persevere, from not knowing much, from not knowing much to knowing a lot, and eventually will succeed and become a skilled electrician.

In fact, it is not difficult to learn electrical technology If you start learning from scratch, you will learn it quickly, and the easiest is to understand the basic electrical knowledge and operation.

There is more than one solution to this problem, and I think the solution I am thinking about will not solve your problem accurately, and the detailed answer needs to be thought of by yourself.

Without basic education, electricians take three months to six months.

Generally, the primary and intermediate training takes three months to half a year, which is quick to learn and easy to get a certificate. It's just that when you first work, it's very difficult, but if someone brings it, it's much faster to get started. This just means that you are a dust collector.

Learn electrician notes:

Understand the basic knowledge of electricians, such as current, voltage, resistance, power supply, load, switch, current conditions, Ohm's law, series circuits, parallel circuits, electrical work and electric power, short circuits, open circuits, DC circuits, AC circuits, multimeters, etc. In the process of learning, we can connect some simple lighting circuits, such as power supplies, wires, switches and loads, to form a closed circuit.

In this way, you can complete the lighting circuit, switch circuit, socket circuit, household electricity can basically be solved. Three-phase alternating current is used in our factory. It is necessary 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 according to the current of the motor.

Master the method of judging the motor with a megohmmeter (shake meter), and learn to use a multimeter to measure the normally closed and normally open states of the above components (both normally open and normally closed refer to the state of non-energized). Distinguish the main circuit and the control circuit (secondary circuit), learn several classic circuits, the motor start-stop circuit and the motor forward and reverse circuit, use the actual components for the circuit wiring, and learn to analyze the circuit to help you quickly and accurately solve the corresponding circuit beam failure. <>

Zero-based electricians should pay attention to: theory and practice, the direction of learning, familiarity with commonly used circuit components, and more analysis of simple introductory circuits. The details are as follows:

1. Electrician is first and foremost a technology, which needs to be affirmed, and electrician is a technology that combines theoretical knowledge and practical experience, and theory and practical experience are equally important.

Don't be overly inclined to practical operation, operation just makes the work at hand proficient and expands your horizons, but if you want to go further and higher, theoretical knowledge is essential.

2. Electrician beginners are recommended to learn the direction: PLC programming, inverter control, tension control, CAD design, DCS configuration, touch screen, etc., which are also relatively high-end electrical technology.

Be familiar with the basic theoretical knowledge of electrician, such as: single-phase electricity, three-phase electricity, household electricity, power supply, voltage, current, power, electrical work, etc., and have a certain understanding of basic theory.

3. Familiar with commonly used circuit components, such as: motors, air switches, leakage protectors, thermal relays, button switches, intermediate relays, speed relays, voltage relays, current relays, etc., which are the basic skills necessary to understand circuit diagrams.

Understand the common electrical components and circuit symbols, such as: AC contactor km, intermediate relay KA, thermal relay FR, button switch, circuit diagram are all this kind of circuit symbols, if you don't understand, you can't understand the circuit diagram.

4. Look at and analyze more simple entry circuits, such as: jog control circuits, self-locking control circuits, forward and reverse control circuits, star-delta step-down start-up circuits, etc., the most basic is often the most important, any complex circuit is composed of simple circuits, for example: most of the control circuits include self-locking circuits, proficient in basic circuits, complex can also be analyzed.

1. Left zero and right fire.

2. The colors of the three-phase five-wire system are yellow, green, red and light blue respectively to represent the double color (PE) of the protective grounding wire.

3. During the operation of the transformer, the current of each phase of the transformer should not exceed the rated current; The maximum unbalanced current shall not exceed 25% of the rated current. After the transformer is put into operation, it should be overhauled regularly.

4. The rated voltage of the secondary coil of the voltage transformer is generally 100V.

5. The secondary side of the voltage transformer shall not be short-circuited when working. Because a large short-circuit current will be generated in the event of a short circuit, the transformer may be burned out, so fuses are installed on the primary and secondary sides of the voltage transformer for protection.

6. One end of the secondary side of the voltage transformer must be grounded. This is to prevent the primary and secondary coil insulation breakdown, the primary high voltage into the secondary side, endangering the safety of personnel and equipment.

7. The secondary side of the current transformer is close to the short-circuit condition when it is working. The rated current of the secondary coil is generally 5A.

8. The secondary side of the current transformer is never allowed to open the circuit when working.

9. One end of the secondary side of the current transformer must be grounded to prevent it.

When the insulation of the primary and secondary coils breaks down, the high voltage on the primary side enters the secondary side.

10. During installation, it must be noted that the wiring is correct and reliable, and the secondary side is not allowed to connect the fuse or switch. Even if for some reason the instrument or other device on the secondary side is to be removed, the secondary side must be shorted before it is removed.

11. Low-voltage switch refers to isolating switches, circuit breakers, fuses and so on below 1kV.

12. The load controlled by the low-voltage distribution device must be clearly divided, and it is strictly forbidden to control and confuse one gate.

13. The interlocking device of low-voltage power distribution device and self-provided generator equipment should operate reliably. It is strictly forbidden to run self-provided power generation equipment in parallel with the power grid without permission.

14. When connecting the equipment: connect the equipment first, then connect the power supply. When disassembling the device: disassemble the power supply first, and then disassemble the device. When connecting the line: connect the zero line first, then connect the live wire. When dismantling the line: dismantle the fire line first, and then dismantle the zero line.

Extended Material: Here's an introduction to how a novice electrician can start with the basics:

1. Basic knowledge of electrician, which is the basis for analyzing circuits.

2. Low-voltage electrical equipment, the key to understanding electrical equipment.

3. Electrical components and circuits, familiar with the components and circuit composition, and the cognition of electrical drawings.

4. Practical experience.

Learn electrician skills well, employment is wide, electrician is a very good skill, various enterprises need electricians, power companies, power equipment, etc. need a large number of electricians.

Home lighting circuits, air open, relay protectors.

Decoration electrician, hydropower renovation, hydropower line design and layout, understand hydropower drawings.

Security monitoring: network wiring, electrician wiring, monitoring routes, cameras.

Factory electrician, factory machinery and equipment lines, motor principle, motor lines, various machinery and equipment lines, multiphase lines, 220 volts, 380 volts various electrical equipment.

High-voltage equipment: mainly high-voltage power lines, transformers, high-voltage equipment and other operations.

PLC Basics: Electrical Automation, How to Become an Electrician, Basic Knowledge of Electrician.

Electrician training, short-term training, learning for about 1-2 months, daily practical exercises, supplemented by theory, practical operation, teaching real technology.

Studying electrician, learning a real technology, and having a lifetime of skills to make your life.

To have a technology, the heart is not panicked, the technology is better and better, the more you do it, the more popular it is.