What is an electrician?

Open Classification: Technology, Engineering, Electricity, Factory, Power Supply

1 Definition of Electrician

1) Personnel engaged in the industrial production system such as electric power production and electrical manufacturing (type of work)

2) Personnel engaged in the study of the objective laws of the electromagnetic field and their application, usually referred to as the electrical engineers

3) Special Variable Electricity Works, that is, the TBEA Corporation

2 electrical trades

1), thermal power plants

1, electrical watchman?

2, plant power watchman?

3, centralized control watchman?

4, elevator maintenance worker?

2), transmission, substation operation and maintenance

1, high-voltage line power maintenance workers?

2, transmission line maintenance and operation workers?

3, distribution line workers?

4, power cable workers?

5, inside the line installer?

6, substation watchman?

7, regulating camera watchman?

8, transformer maintenance worker?

9, substation maintenance worker?

10, the transformer with power overhaul workers?

11, DC equipment maintenance workers?

12, electrical test workers?

13, relay protection workers?

14, installing meter electrician?

15, electrical instrumentation workers?

16, electricity inspector?

17, meter reading and accounting charges?

18, meter repair and calibration workers?

19, power reload controller?

3), thermal power construction?

1, high-voltage electrical installers?

2, secondary line installer?

3, plant power installer?

4, cable installer?

4), transmission and substation engineering and construction?

1, transmission line erection workers?

2, substation primary installer?

3, substation secondary installer

5), hydroelectric power plant?

Hydro generator set watchman

6), other?

1, Dispatcher?

2, electrician?

3, Maintenance Electrician?

Note: 1, some of the trades are common to each other.

7), China's vocational qualification appraisal, divided into five levels: primary, intermediate, senior, junior technician (generally known as technician), senior technician. Therefore, technician, senior technician, is still a series of workers, not a title.

Which three electrician that senior electrician

8), title refers to the primary engineer (assistant engineer), intermediate engineer (engineer), senior engineer, professorial engineer (China's unique, equivalent to a university professor)

3 Introduction to electrical

Electromagnetism is the existence of matter in nature prevails in a basic physical properties. Therefore, the study of electromagnetic law and its application of electrical science and technology on material production and social life

all aspects, including energy, information materials and other pillars of modern society have a profound impact. Electrical energy as a secondary energy, easy to obtain from a variety of ways (such as hydro

power generation, thermal power generation, nuclear power generation, solar power and other new energy generation, etc.), but also easy to convert to other forms of energy to meet the social production and life

all kinds of needs (such as electric power, electric heat, electrochemical energy, electric light source, etc.). Compared with other energy sources, electric energy in the production, transmission, use of more easily regulated. This series of

advantages, so that electrical energy has become the most ideal secondary energy, especially by people's attention. The development of electrical energy and its wide range of applications to become after the invention of the steam engine, modern history, the second

The core content of the technological revolution. 20 century, the emergence of large power system constitutes the industrial society to transmit the energy of the arteries; to electromagnetic as the carrier of information and control systems are composed of

The modern society's neural network. The development and application of various emerging electrical materials have enriched the content of modern materials science. The realization of the unity of the material world, the birth of modern physics

and the development of system cybernetics, etc., are directly or indirectly affected by the development of electrical engineering. At the same time, the achievements of various neighboring disciplines also continue to promote the development of electrical engineering to a higher level

level. Therefore, the level of development of electrical engineering is an important symbol of the degree of modernization of society, is to promote the development of social production and science and technology, and promote the civilization of society's powerful

lever. Electrification and modern society Since the 1880s, the application of electrical energy, almost all the technical sectors of social production and people's lives, are gradually transferred to this

a new technological basis, greatly promoting the development of social productivity, changing the social lifestyle of mankind, so that the twentieth century to the "electric century" in history. "

The lighting is a new technology.

Electric lighting development earlier. It eliminates the darkness of the night on the human life and production of labor restrictions, greatly extending the human labor time used to create wealth, improve the labor conditions

Conditions, enriching people's lives. This laid the broadest social basis for the application of electric energy, become a powerful driving force to promote the production of electric energy. Electric drive is the widest range, form

most electric energy applications, electric motors as the most important power source, fundamentally changed the face of the 19th century based on steam power of primary industrialization. Electrothermal,

Electrochemistry, the development of electrophysics, opened up a new industrial sector and scientific research areas. In short, the application of electricity not only affects all aspects of material production, but also more and more

To the wider penetration of human life at all levels (the wide application of medical appliances and the popularization of household appliances are just two familiar examples). Electrification has become a synonym for modernization to some extent, and the degree of electrification has become an important symbol to measure the level of development of social material civilization. Large-scale, multi-level engineering systems Electricity spreads at the speed of light

, and has so far failed to achieve industrial-scale storage. Therefore, the production and consumption of electrical energy is almost completed in the same instant, with the hair with the use. Power generation, power transformation, power transmission, power distribution,

Electricity consumption of the various components of the inseparable whole is always in continuous operation. This set of power generation, power supply, electricity in one of the large power system is the history of human engineering science

one of the most important achievements. To the 1970s, the world has built several installed capacity of more than 100 million kilowatts of large-scale power system, which covers the largest area of more than

10 million square kilometers. Each system transmits and distributes more than a trillion kilowatt-hours of electricity annually. In such systems, active currents, reactive currents, high harmonics, negative sequence

currents, etc. propagate instantaneously at the speed of light system-wide. It can either deliver large amounts of power and create great wealth, or it can cause major catastrophic accidents in an instant. In order to ensure that such

giant system safe, stable, economic operation, the system's control methods and automation devices put forward a high standard requirements. Power system has become the social material production sector in

spatial span of the most extensive, time coordination requirements, strict requirements, the hierarchical division of labor is extremely complex entity engineering system. In a sense, it is the emergence and development of power systems, promote the formation of system

structural engineering and automatic control of this high-tech field, and led to a series of industrial, scientific research sector development. Electrotechnical manufacturing and new technologies in electrical engineering Electrotechnical manufacturing industry for

Electric energy production and consumption system to provide material equipment. With the growth of the demand for electric energy, in order to meet the needs of the construction of large power plants, by improving the cooling technology of generators, adopting

new insulation materials, ferromagnetic materials, and improve the structural design of the generator to make the stand-alone power increase, cost reduction . The power of the largest thermal generating units from 1926

160 MW increased to 1300 MW in 1973; hydroelectric units from 108 MW in 1942 to 700 MW in 1978; nuclear units from 5 MW in 1954 to

higher to 1300 ~ 1500 MW in the 1980s. With the expansion of the scale of the power system, transmission and substation equipment capacity also increased rapidly. Following the 1952 made the first set of 380

kV AC power transmission and transformation equipment, after the 70's and successively made 1000 ~ 1500 kV AC power transmission and transformation equipment. About 70% of the load in the electrical equipment for the electric

motor, such as the large steel rolling motor and blast furnace blast motor, its stand-alone power were up to 12,780 kilowatts and 36,000 kilowatts; small, there are hundreds of different uses of microelectronic

machine. The emergence of power electronics technology not only makes the DC transmission technology can be steadily developed, but also to make AC and DC transmission technology and a variety of power conversion technology have been revolutionized. It will

Microcomputer control and power to perform a close combination of unified completion of the logic, control, monitoring, protection, diagnosis and other integrated functions, a powerful impetus to the mechatronics technology trend.

Efforts to explore new ways of power generation is an important aspect of the development of electrical engineering. Since 1954, nuclear power generation soon became the third largest power generation after thermal power, hydropower. 50

The end of the era, the magnetic fluid power generation came into prominence, by 1985 has built 500,000 kilowatts of industrial magnetic fluid - steam combined heat and power station . The realization of controlled fusion reaction is one of the ways to finally solve

the energy problems of human society. All countries are focusing on research. By the 1990s, mankind is moving towards the door of solving this problem. The new breakthroughs in superconducting materials research

showed people the attractive prospect of the superconducting electrician era. Fuel cells and power storage batteries can be built in a decentralized manner, without the need for long-distance transmission, which will potentially open up a whole new realm for the power supply

demand system. Scientific research, technology development, production and application of the crystallization of the close coordination of the application of electrical energy as a symbol of the technological revolution is different from its predecessors

The fundamental point of the revolution is that it is not directly from the workshop or other areas of production and practice, but from the scientific laboratory. It was its emergence that first wrote science and technology as a productive force

clearly in the history of human understanding. Humans have long noticed the electromagnetic phenomenon in nature, but it was not until 1800 that A. Voltar invented the Voltar battery in his experiments, so that the human

Human beings for the first time to obtain a continuous and stable power supply, promoting the study of electricity turned to the electric current and began the study of electrochemistry, arc discharge and lighting, electromagnet and other applications of electrical energy.

In 1831, M. Faraday discovered the law of electromagnetic induction through experiments, promoting the development of electromagnetic science and technology. The discovery of this law not only makes electrostatic, kinetic electricity (electric

current), current and magnetic field mutual inductance and a series of electromagnetic phenomena to achieve a more comprehensive understanding of the unity, but also laid the foundation of the principle of mechanical and electrical energy conversion. 1873

In 1873, J.C. Maxwell derives the basic equations describing the theory of the electromagnetic field --- Maxwell's system of equations, which became the system of equations of the electromagnetic field, and the system of equations of the electromagnetic field. -Maxwell's system of equations became the theoretical basis for the entire field of electrical engineering. The invention of the generator realized

the conversion of mechanical energy into electrical energy, conquered the magical power of nature, and heralded the arrival of the era of electrification. At the same time with the invention of the generator process, electric lighting, electroplating, electric

decomposition, electrometallurgy, electric power and other industrial production technologies have matured. Bred power generation, power transformation, power transmission, power distribution, power linkage as one of the birth of the electric power system. 19th century

90s three-phase AC transmission technology invention, so that the electric power industry with the status of the basic industries into the ranks of modern industry, ushered in the 20th century, the electrification of the new era. Modern science and technology

The development of science and technology and industry is the process of basic theoretical research, applied research, technology development is closely integrated. The trend of scientific and technological synthesis is becoming more and more obvious. It is necessary to make

individual research to collective research. 1876, T.A. Edison took the lead on this necessary path, founded the world's first industrial applied research laboratory. In this was

People praise "invention factory", he organized a group of specialists to divide responsibility, *** with the same commitment to the same invention, breaking the past only by individual scientists engaged in research

The tradition of research. This with modern science and technology and productivity development level of technology research and development of the correct path, showing great vitality, not only to promote the rapid development of electric power production

production and electrical manufacturing industry, but also created a basic science, applied science, technology development of the three are closely integrated, synergistic development of the precedent