Mainly study the basic knowledge of circuit, such as ohm's law Kirchhoff's law, superposition principle, Thevenin's theorem and so on. Electrician's various wiring technologies and installation and debugging, such as lighting and power distribution, workshop and indoor, power distribution, double control and single control incandescent lamp debugging, etc.
The circuit principles, installation, debugging and maintenance of wire control circuit, self-locking control circuit, electric continuous operation control circuit, contactor continuous forward and backward rotation control circuit, double interlocking forward and backward rotation control circuit and sequential start control circuit.
Principle and maintenance of three-phase motor rotation and series resistance step-down starting control circuit. Principle and maintenance of Y-△ step-down starting control circuit. Working principle, mechanical structure and basic excitation constant voltage device of DC generator, alternator and motor; Winding, structure and maintenance of ac motor. Working principle, wiring method and daily maintenance of electrical components and transformers in power distribution cabinets.
It is absolutely impossible to learn electrician by relying on the theoretical knowledge of books. Theoretical knowledge is the basis of learning electrician and the soil for beginners to learn nutrition. But in the field of electrical engineering, practical experience is equally important, and the two complement each other and are indispensable. This is the truest portrayal that practice is the only criterion for testing truth.
Theory without practice is empty talk, and practice without theory is a lie, which is the so-called fake electrician. Therefore, theory must be combined with practice.
The process of learning electrician is the process of learning safe operation. Electricity is a very abstract thing, invisible and intangible. Therefore, safe operation is the premise to ensure its own safety. Its contents mainly include switching operation, power failure inspection, hanging grounding wire and warning signs, wearing insulation protective equipment, etc. Only by knowing how to protect yourself can we better engage in related work in the field of electrical engineering.