The principle of operation of the Peltier element is based on the Peltier effect, which consists in the fact that when a direct electric current is passed through a junction of two dissimilar conductors, energy is transferred from one conductor of the junction to the other, while heat is released or absorbed at the junction.The amount released or absorbed during this process heat, will be proportional to the current, the time it flows, as well as the Peltier coefficient, characteristic of a given pair of soldered conductors. The Peltier coefficient is equal to the thermo-emf coefficient of the pair ...
Electromagnetic oscillations in a circuit consisting of an inductor and a capacitor occur due to the periodic conversion of electrical energy into magnetic energy and vice versa. At the same time, they change periodically electric charge on the capacitor plates and the magnitude of the current through the coil.Electromagnetic oscillations can be free or forced. Free oscillations, as a rule, are damped due to the non-zero resistance of the circuit, and forced oscillations are usually self-oscillations.To obtain free vibrations in an oscillatory circuit...
Permanent magnets are pieces of iron, steel and some iron ores that have the ability to attract other pieces of the same metals. Pieces of ores that have magnetic properties are called natural magnets. These properties are most pronounced in magnetic iron ore. To a lesser extent, iron pyrite, as well as some ores of nickel and cobalt, have the same properties.Recently, neodymium magnets have become very popular and widespread. Artificial magnets are made from special grades of steel...
As you know, complex numbers are used to solve some typical problems in electrical engineering. But what are they used for and why do they do it this way? We will try to figure this out throughout this article. The fact is that the complex method, or the method of complex amplitudes, is convenient for calculating complex circuits alternating current. TOa complex number includes an imaginary and a real part, which differ from each other and are designated differently in the text.The complex number itself can be written in algebraic, trigonometric or exponential form ...
The torque developed on the shaft of an asynchronous electric motor under conditions of zero rotor speed (when the rotor is still stationary) and the current established in the stator windings is called the starting torque of the asynchronous motor.The starting moment is sometimes also called the starting moment or the starting moment. This assumes that the voltage and frequency of the supply voltage are close to the nominal value, and that the windings are connected correctly. In nominal operating mode, this engine will operate exactly as the developers intended...
For some technical purposes, we will look at an example of a couple of them here, it is necessary to calculate the parameters of magnetic circuits. And the main instrument in these calculations is the law apparent current. It sounds like this: the linear integral of the magnetic field strength vector along a closed circuit is equal to the algebraic sum of the currents covered by this circuit.For example, consider the magnetic circuit shown in the figure. Here the ferromagnetic core has the same cross-sectional area along its entire length. Has a certain length of the average force line...
In household appliances, in welding machines, for testing and measuring purposes, single-phase transformers of relatively low power are usually used. Powerful single-phase transformers are used to power industrial power plants.A conventional transformer has a magnetic system in the form of a closed frame containing two rods, as well as an upper and lower yoke. The rods contain low voltage (LV) and high voltage (HV) windings. For the most rational use of the two-rod magnetic system, the higher and lower windings...
Functioning for its intended purpose, any sensor can be exposed to a variety of physical factors: temperature, pressure, humidity, light, vibration, radiation, etc. At the same time, the sensor must clearly perceive and measure only one specific value, which is called to the sensor, a natural measured quantity. Let's denote it with the letter "A". The output value of the sensor will be denoted by the letter “B”.Then the functional dependence of the output value of sensor B on the natural measured value A, under static conditions...
The use of organic semiconductors extends to many areas of electronics: they are used as light-sensitive materials for recording information, and are used in the manufacture of sensors. Devices made on the basis of organic semiconductors are resistant to radiation, so they can be used even in outer space and in nuclear technology.Organic semiconductors include solid organic compounds that initially have, or acquire under the influence of external factors, hole or electronic conductivity...
In chains direct current active resistance R plays an important role. As for sinusoidal alternating current circuits, active resistance alone cannot be used here. After all, if in DC circuits capacitances and inductances are noticeable only during transient processes, then in AC circuits these components manifest themselves much more significantly.Therefore, for an adequate calculation of alternating current circuits, the term “electrical impedance” is introduced - Z or the complex (total) resistance of a two-terminal network to a harmonic signal. Sometimes they just say "impedance"...
/ File with tickets that are given in the article. Attention! No answers provided. For the purpose of fruitful learning, print the file and transfer the answers from the article., pdf, 305.32 kB, downloaded: 7594 times./
/ Another version of tickets for the extraordinary exam, pdf, 401.18 kB, downloaded: 7684 times./
/ Rules for labor protection during operation of electrical installations. Because of which all decent electricians have to take an extraordinary additional exam)), pdf, 927.76 kB, downloaded: 5841 times./
/ Comparison of old and new OT rules. For those who like to dig deep)), pdf, 1.36 MB, downloaded: 2827 times./
Books for radio amateurs
/ Yu.A. Vinogradov. Security equipment. Engineer's Library. The book provides detailed descriptions of security equipment devices, which are suggested to be repeated with your own hands., djvu, 1.47 MB, downloaded: 2391 times./
/ Spy things and devices for protecting information objects. The book provides diagrams of devices for protecting information, describes principles of operation, and provides recommendations for manufacturing and configuration. The book is intended for trained radio amateurs who want to apply their knowledge in the field of information security., pdf, 931.38 kB, downloaded: 2475 times./
/ A book for schoolchildren starting to study radio electronics. The first book by the author of the site www.site. Thanks to my dad!, djvu, 9.09 MB, downloaded: 3316 times./
Books for electricians (household electrics)
/ 3rd edition, revised and expanded. 2003 Apartment wiring, repairs household appliances, connecting three-phase electric motors to a 220 V network, electronic locks, home workshop, danger alarms, etc., djvu, 3.79 MB, downloaded: 4847 times./
/ 3rd edition, revised and expanded. 2003 Electrical power sources, homemade welding machines, water for garden plot, useful devices for leisure., djvu, 3.73 MB, downloaded: 3924 times./
/ Installation and operation of electrical wiring. Switches, sockets, panels, lamps. Handbook to help the home handyman., pdf, 1.27 MB, downloaded: 5333 times./
/ Theoretical basis single-phase and three-phase power supply. Types of voltage stabilizers, connection and selection., pdf, 1.09 MB, downloaded: 3946 times./
/ Brochure from the Electrician's Library. Provides instructions and calculations necessary for selecting cross-sections of wires and cables up to 1000 V., zip, 1.57 MB, downloaded: 203 times./
Books for professional electricians
/ The book is a reference book that describes in detail the design, operating principle and characteristics of asynchronous electric motors. Reference data is provided for engines of previous years of production and modern ones. Electronic starting devices (inverters), electric drives are described., djvu, 3.73 MB, downloaded: 3077 times./
/ Selecting a thermal relay., pdf, 34.01 kB, downloaded: 2520 times./
/ The principles of operation are discussed in detail fluorescent lamps. Production process, switching circuits, parameters. Lots of theory, good textbook, djvu, 2.72 MB, downloaded: 9427 times./
/ Issues of operation, installation and development of tubular discharge lamps with a cold cathode., djvu, 2.86 MB, downloaded: 2854 times./
Electronic device repair
/ Manual for repairing energy-saving lamps. It tells how you can give a second life energy saving lamp. Or put one together from two or three., doc, 25.62 MB, downloaded: 18066 times./Documentation, design, development
/ Unified standards and prices for construction, installation and repair work. Collection E23. ELECTRIC INSTALLATION WORK. Issue 7. Distribution and control equipment., docx, 336.29 kB, downloaded: 1869 times./
/ Instructions for the design of power and lighting electrical equipment for industrial enterprises SN 357-77., doc, 479 kB, downloaded: 1896 times./
/ Design and installation of electrical installations of residential and public buildings. Set of rules SP 31-110-2003, doc, 1.05 MB, downloaded: 2226 times./
/ Symbols for electrical diagrams and rules for their application. Guide to drawing up diagrams. It is shown how to use electrical circuit diagrams when checking the correct installation and detecting problems in electrical installations., djvu, 5.34 MB, downloaded: 4238 times./
/ The book discusses the purpose, classification and symbols of electrical circuits and drawings of electrical installations, a description of these circuits and drawings is given., djvu, 1.12 MB, downloaded: 2906 times./
Automation
/ V.V. Denisenko. Computer control technological process, experiment, equipment. Modern theory and practice of industrial and laboratory automation., djvu, 11.12 MB, downloaded: 2254 times./
/ Semiconductor electronic time relays of different years of production are considered. The principles of operation and features of the circuit design of electronic relays with different element base are outlined - on discrete semiconductor elements, integrated circuits, microprocessors. The main technical data of the time relay are given., djvu, 1.77 MB, downloaded: 1854 times./
/ The structure of the hardware construction of digital protection and automation devices is presented. Given specifications individual digital relay nodes., djvu, 1.96 MB, downloaded: 1427 times./
Programs for electricians and radio amateurs
/ The program is not professional, but it is very convenient for quickly and easily drawing diagrams. The archive contains Russian help, component libraries, installation file, viewer, description file. Does not require an activation key, works immediately after installation., rar, 3.55 MB, downloaded: 8561 times./
/ Including elements with thick lines, modular equipment of 2D and 3D photo quality, GOST designations, etc., zip, 32.59 MB, downloaded: 376 times./
/ Reader for TIFF, PDF, DjVu, FB2, XPS, JBIG2 and others text documents. IN djvu format many books are posted on this page., rar, 2.1 MB, downloaded: 3674 times./
More
A lot of things can be downloaded from the blog pages. The fact is that at the end of each article I try to post the files (instructions, datasheets, manuals, programs) that I used in preparation for the article.
I also recommend the site Igrotechnics.ru - the largest project on the Russian Internet dedicated to the technical side of the gaming and vending business. This site contains an organized technical documentation, descriptions, manuals, operating instructions, manuals, diagrams... In a word, everything that will be useful to those who deal with gaming, entertainment and vending equipment from the technical side.
Currently, you can download more than 6 thousand files from this site!
Name: Electrician's General Book (2014) PDF
Release year: 2014
Publisher: AST
Format: PDF
File: GlavElektr.pdf
Size: 80MB
Description of the book "Electrician's Book (2014) PDF"
Vladimir ZhabtsevPublisher: AST
Genre: Construction, renovation
Format: PDF
Quality: Nice scan
Illustrations: Colored
Size 80 MB
Description:
People have been familiar with electrical phenomena since ancient times. However, their practical use began much later. Today, electricity has become so firmly established in our everyday life that we hardly think about its essence. We know that an electrical appliance plugged into an outlet will work, and a light bulb screwed into a socket will light up. But what should you do if you suddenly need to, say, fix some problems in your home electrical wiring or install it? Is it really necessary to turn to professionals for help and shell out a tidy sum for it? Not at all - you can figure everything out on your own. This publication will help you with this. What tools will be needed for certain jobs? What should you do if you have to install electrical wiring? Which wires to choose and how to calculate home network? How to protect it from overloads and short circuits? How to protect yourself from defeat electric shock? This book will answer these and many other questions. It presents all the most necessary information, which often takes a lot of time to find. The articles are accompanied by numerous illustrations, which will undoubtedly allow you to better understand the information.
“The Great Electrician's Encyclopedia” by Mikhail Chernichkin will be useful for those who cannot call themselves a professional in handling electrical equipment. In the modern world, not a single house or apartment can live without electricity. People often prefer to do repairs themselves, and sometimes a specialist simply cannot be found in right moment. This book will help even beginners understand what electricity is and how to work with it correctly.
First of all, the author gives basic concepts to make it easier to understand what the text is about. He talks about the variety of tools, both hand and power. He pays special attention to safety precautions and first aid in case of electric shock.
From this book, readers will be able to learn about various cables, cords, and wires. Here we tell you which products will help you install electrical equipment. The installation of wiring and electrical points with open and closed types of wiring is considered separately. The author writes about the types and installation of lighting in different rooms, talks about the features of installation in a private house. A separate chapter discusses the design of electricity in “ smart home" From the encyclopedia, readers will also learn how to repair broken parts and replace sockets and switches. The book contains a large number of bright and detailed illustrations with captions. This helps you to navigate well in what is written, understanding what and how to do in practice.
On our website you can download the book "The Great Electrician's Encyclopedia" Mikhail Yurievich Chernichkin for free and without registration in fb2, rtf, epub, pdf, txt format, read the book online or buy the book in the online store.
- a program created by the developer Alex1001000R for Android, which will help a person in a difficult situation related to electricity. It has a simple and intuitive interface, does not heat up the device and is great for weak smartphones. The application runs on Android versions 4.0.3. The update is released at the beginning of each season (delays of 1-2 months are allowed). Google users Play rated the application 4.3 out of 5. The total number of reviews exceeds 500, and downloads exceed 500,000.
The directory installation file weighs 4 megabytes, after installation it will take 6 MB.
When entering the program, we immediately find ourselves in the main menu, from where we can select the required function. The interface is made in dark colors, so it is pleasing to the eye. The name of the application with its logo is displayed at the top. “” Functions:
1. Section calculation;
2. Calculation of voltage loss;
3. Selecting a circuit breaker;
4. Calculation of the fuse link;
5. Electric drive;
6. Reference data (not a computational algorithm, but simply manuals and articles with diagrams, for example, determining the beginnings and ends of the stator winding);
7. Ohm's law;
8. Useful circuits (gallery in which there is a circuit: magnetic starter, reversing magnetic starter, wired switch, etc.
9. Grounding.
Each function is a kind of calculator that calculates the required parameter knowing the data, for example, the cross-section can be calculated based on the network voltage, wire material, cable laying method, current or power, loss, length and temperature.
The application is available for free download at Google Play. It contains advertising. It is displayed at the bottom of the screen constantly, and also appears on the display approximately every 5-7 clicks. You can disable ads by simply disconnecting the Internet connection for the duration of use or by purchasing a version without ads.
To get to the GP page from full version Click on the button in the upper right corner, select “About the program”, then the section will open. In it, select the “follow link...” item. You are automatically redirected to official page Google Play where you make your purchase. “ ” is a useful tool in the hands of every electrician, physics teacher or student, optimized for Android.
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