Dongguan 2016 Dalingshan Electrical Circuit Breaker teaches you how to use it for training

Carbon film resistors are made by evaporating and depositing crystallized carbon, which is decomposed under vacuum and high temperature conditions, on a ceramic skeleton. Carbon film resistors have good voltage stability and low cost, and are widely used in ordinary electronic products. Wirewound resistors are made of resistance wires such as nickel-chromium alloy and manganese copper alloy wound on an insulating bracket. The inside is coated with a heat-resistant glaze insulation layer. Resistors can be divided into load resistors, sampling resistors, shunt resistors, drain resistors, protection resistors, etc. according to their functions. A row resistor (referred to as a row resistor) is a combination resistor that integrates discrete resistors arranged in a regular manner. It is also called an integrated resistor or a resistor network. One of the pins has a common ground, and the other pins have the same resistance.
Contact
Teacher Li
Consultation phone number
br/>School name
Dongguan Guangyou Vocational Training School
Place
Addressed on the third floor of Dongguan Bus Terminal East Station (Guangyou Education)
Guangyou Vocational School is open all year round
,
Learn electrician and provide electrician exam practice software
Guangyou Education
Training objectives
Start from zero basics, guide students in all aspects, how to connect indoor and outdoor wires, emergency first aid and treatment of electric shock, electrician field operation and theory, safe operation, on-the-job operation and employment experience practice< br/> Introduction to specific electrician training courses
Introduction to junior electrician training courses
Safe operation of electricians
Basic knowledge of electrical circuits
Calculation of circuits
Series and parallel connections of resistors and applications
AC, DC
Single-phase AC, three-phase AC
Transformers, mutual inductors
Single-phase meters, three-phase meters
Electric motors
Electrical instruments The use of
Multimeter
Megohmmeter
Current clamp meter
Ammeter
Voltmeter
Application of low voltage electrical appliances
Fuse
Knife switch
Circuit breaker
Contactor
Thermal relay
Intermediate relay
Time relay
Button
Lighting circuit practical operation
Industrial power circuit practical operation
Motor forward rotation control
Motor interlocking forward and reverse rotation control circuit
Double interlocking forward and reverse rotation control circuit
Workbench automatic reciprocating control circuit
br/>Motor sequential start control circuit
Motor reduced voltage start control circuit
Intermediate electrician training course training content electrical control technology, electrician and electronic basics, maintenance electrician technology, internal and external line electrician
Technology Learning,
Electrical equipment operation,
Transformer and motor operation and maintenance, programmable controller principles and applications,
Electrical
knowledge of electrical measurement, practical operations, etc., advanced training content digital circuit technology , Factory power transformation and distribution technology,
Factory electrical control technology,
Principle and application of programmable controller,
Principle and practical technology of single chip microcomputer,
Rectifier and inverter
Variable technology, frequency converter principle and application technology, practical operation, etc.
The temperature coefficient of the resistor indicates the change in the resistance value of the resistor as the temperature changes, that is, the physical quantity of thermal stability. The temperature coefficient is the relative change in resistance value caused by each °C change in temperature. The smaller the temperature coefficient, the better the stability of the resistor. The resistance that increases with temperature is a positive temperature coefficient, and vice versa is a negative temperature coefficient. It should be noted that the resistor noise is closely related to its error level. The lower the precision of the resistor, the greater the noise in the circuit. Therefore, in the application, the potentiometer is actually a variable resistor. The figure shows the structure diagram of a potentiometer. It has a lead-out terminal, including two fixed terminals (, terminals) and one movable terminal (terminal). Rotating the movable arm can change the position of the movable reed, thereby changing the resistance value between the ~ terminals or ~ terminals. Equivalent circuit diagram of potentiometer