Electrics & Electronics

18.07.2017
BASIC MAINTENANCE AND PROGRAMMING USING S7—400 PLC

Nice and quite rare publication, very useful for people dealing with the PLC programming. Students who manage to satisfactorily complete the course material will be able to duly understand the system of numbering that is applicable to the programmable logic controllers, identify the most important parts of such controllers and explain how they function, identify all typical discrete inputs/outputs, configure the applicable hardware using the S7 Simatic Manager program, assemble the controller hardware as per the hardware configuration completed in the above mentioned software, understand how to properly wire the distributed input/output of this controller, read the basic ladder logic diagrams, know how to convert the electrical ladder to programmable logic controller ladder logic diagram and how to prepare the controller program using the ladder logic and same S7 Simatic Manager, know how to download the controller program to the S7 400 CPU and how to test and simulate the controller program with the above stated software.

The guide starts with the brief overview describing the very basics of the operation of the programmable logic controllers, the sensors and actuators, and all other equipment; this knowledge is considered pre-requisite for proper understanding of the rest of material...

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16.07.2017
ELECTRICAL POWER SYSTEMS

For the past half-century or even more than that, the electrical energy has significantly diversified and got much broader. There are several new topic areas that range from light-wave technology to the microelectro-mechanics. The book has been prepared and released with the specific intention to keep pace with the industry progress mentioned above.

The technical info contained in this publication can hardly be found in any other publication, presented in a single volume. The opening chapter of the publication provides readers with quite a brief intro to the basic concepts that are relating to the electrical power system structure, just an overview, while the following two parts have been solely dedicated to the parameters of the multi-circuit transmission lines. Then, the steady state and transient presentations are discussed together with the modeling of the synchronous machines.

After that, the chapters come dealing with the power system component modeling and covering the modeling, performance and compensation of the transmission lines, presenting the coverage of the load flow solutions, covering balanced and unbalanced flow analysis, discussing upon the key concepts of power system stability types, AGC of interconnected and isolated electric power systems etc.

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16.07.2017
ELECTRICAL POWER CABLE ENGINEERING

Here is the 2nd, revised and updated release of the popular publication, which continues to serve as one of the best available reference sources on all medium-voltage/low-voltage electrical power cables; it is cataloging all relevant technical characteristics of the cables and is therefore assuring the eventual success for the manufacture, correct choice, installation and operation plus, of course, subsequent technical maintenance of the electrical cables.

Some of the segments related to the insulation of the electrical cables and to the field assessment were revamped in order to make them reflect the latest transformations in the electrical industry; moreover, some completely new chapters were added, for example ones touching the location of the underground faults, thermal resistivity etc. The author of the book, William A. Thue, did pay so much of the attention to the historical perspective of electrical cables, and addressed the basic dielectric theory of electrical cables, major technical characteristics of electro-conductors and cables.

The electrical properties of various insulating materials and shielding of power cables, jackets, sheaths and armors have also been dealt with in this publication. Finally, the last part of this publication has been dedicated to the various relevant industry specifications and standards.​

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16.07.2017
ELECTRICAL NETWORK THEORY

Initially, from the very time of its preparation, this publication has been conceived as a revision of another one, also very practical and proven useful to the readers, namely Linear Network Analysis, which was published in 1965. Sometimes, when conducting the study of the electrical systems, is may become appropriate to specifically address to internal structure and the composition of the electrical system in question.

Then, the topology shall definitely be considered the critical analytical tool to use. However, it shall be noted that in most of the other cases the external characteristics analysis would be the one that presents interest. In this book the authors are mostly dealing with the internal composition and port, or system, characteristics. The most important mathematical tools are matrix analysis, complex variable functions, linear graphs etc. The good attempt was made in this book to a very careful development of the network theory fundamentals.

The authors also considered the frequency and time response, synthesis and analysis. Though most part of the book is limited to the linear and time-invariant electrical networks, one of the chapters have been specifically concerned with time-varying and non-linear networks.​

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16.07.2017
ELECTRICAL MEASUREMENT, SIGNAL PROCESSING, AND DISPLAYS

Below you may see the list of topics that have been covered by the authors of this publication - as you can see, the main emphasis was made by the authors on the various techniques and ways of measurement of following characteristics. The readers will get necessary technical information describing the electromagnetic variables measurement as well as the voltage and electric power measurement, understand the power factor and electric phase measurements and energy measurement.

The book sheds the light on the measurement of the electrical conductivity/resistivity and charge and also on the measurements of the electric capacitance and permittivity. The issues relating to the measurements of the electric and magnetic field strength, permeability and hysteresis, inductance and immittance, Q-factor, distortion, noise and microwave measurement have also been addressed together with the signal processing, filters and modulation matters, spectrum analysis/correlation, analog-to-digital converters, computer technology and telemetry, sensor networks/communication.

Among another important topics there are electromagnetic compatibility, various types of displays including LCD, plasma, cathode ray tube, light-emitting diode etc, reading and recording devices... Well-illustrated and useful source of technical information for electrical engineers.​

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16.07.2017
ELECTRICAL INSTALLATIONS IN HAZARDOUS AREAS

This publication appears to be the only one available, that would be able to provide a truly comprehensive coverage of this vital area. It was prepared by a world leading and Internationally recognized UK authorities in the subject field. The books will be very useful for all readers since it brings together all relevant technical information from the number of various European and British technical standards and presents all gathered info in a single volume.

We are pretty sure that the present title would be not only very useful to the marine engineers from the United Kingdom and/or European countries who are involved with electrical installations that have been located in hazardous areas, but especially to United States professionals who are not as conversant with the technical approach taken in the Europe and UK. We would therefore highly recommend this book to all such engineers. It is the must have book for everyone who need to decide how to rate an area properly.

The publication is intended to address all issues related to the location of the various equipment in the hazardous areas on offshore installations and other facilities, and explains readers the increasing complexity of the relevant technical codes and standards...

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16.07.2017
ELECTRICAL ENGINEERS PORTABLE HANDBOOK

While the very first edition of this handbook proved the most successful of the whole Portable Handbook series, being aimed at electrical technicians and engineers who are working in building electrical power systems, the present new release of this book has been necessitated by the very latest version of the NEC, i.e. National Electrical Code, rendering much of the existing material obsolete.

This, in turn, necessitated about half of the book's content be re-written. The publication will definitely be very useful for any worker of the electrical industry since it contains so much valuable technical info plus recommendations provided from the equipment manufacturers, covering grounding issues and maintenance, fire protection systems and lighting, electrical motors etc. The text is supplemented with numerous charts and graphs for illustration.

We would consider this publication a truly indispensable and handy reference source for all electrical engineers. Most part of the reference material in the handbook bases on the recognized engineering practices and classic methods. Some basic design calculations have also been included in this book. This is a quick-look-up working tool for the electricians which is intended to take the guesswork out of nearly any electrical design calculation and related task.

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16.07.2017
ELECTRONIC SYSTEMS MAINTENANCE HANDBOOK

The approach to probability and statistics used in this chapter is the pragmatic one that probability and statistics are methods of operating in the presence of incomplete knowledge. The most common example is tossing a coin. It will land heads or tails, but the relative frequency is unknown. The two events are often assumed equally likely, but a skilled coin tosser may be able to get heads almost all of the time.

The statistical problem in this case is to determine the relative frequency. Given the relative frequency, probability techniques answer such questions as how long can we expect to wait until three heads appear in a row. Another example is light bulbs. The outcome is known: any bulb will eventually fail. If we had complete knowledge of the local universe, it is conceivable that we might compute the lifetime of any bulb. In reality, the manufacturing variations and future operating conditions for a lightbulb are unknown to us. It may be possible, however, to describe the failure history for the general population. In the absence of any data, we can propose a failure process that is due to the accumulated effect of small events (corrosion, metal evaporation, and cracks) where each of these small events is a random process.

It is shown in the statistics section that a failure process that is the sum of many events is closely approximated by a distribution known as the normal distribution. A manufacturer can try to improve a product by using better materials and requiring closer tolerances in the assembly. If the light bulbs last longer and there are fewer differences between the bulbs, then the failure curve should move to the right and have less dispersion...

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