|Servo Magazine Issue 12 - December 2012 (True PDF)|
English | 84 pages | True PDF | 13.98 Mb
Electrical Power Transmission system
Electrical power is generated at different generating stations. These generating stations are not necessarily situated at the load center. During construction of generating station number of factors to be considered from economical point of view. These all factors may not be easily available at load center, hence generating station are not normally situated far away from load center.
|2012 | ISBN: 3642273335 | PDF | 1048 pages | 25 MB|
bThe volume includes a set of selected papers extended and revised from the 2011 International Conference on Mechanical Engineering and Technology, held on London, UK, November 24-25, 2011. Mechanical engineering technology is the application of physical principles and current technological developments to the creation of useful machinery and operation design. Technologies such as solid models may be used as the basis for finite element analysis (FEA) and / or computational fluid dynamics (CFD) of the design. Through the application of computer-aided manufacturing (CAM), the models may also be used directly by software to create "instructions for the manufacture of objects represented by the models, through computer numerically controlled (CNC) machining or other automated
|2011 | ISBN-10: 1439802890 | PDF | 4052 pages | 122 MB|
The Industrial Electronics Handbook
Industrial electronics systems govern so many different functions that vary in complexity��from the operation of relatively simple applications, such as electric motors, to that of more complicated machines and systems, including robots and entire fabrication processes.
True PDF | English | 225 Pages | 86.08 MB
English | True PDF | 12 issues | 310 Mb
MATLAB for Engineers - Applications in Control, Electrical Engineering, IT and Robotics by Karel Perutka
Details of Book: MATLAB for Engineers
Book: MATLAB for Engineers - Applications in Control, Electrical Engineering, IT and Robotics
Authors: Karel Perutka
ISBN: 9789533079141 InTech
Publication Date: Oct 2011
Description: The problems of system grounding, that is, connection to ground of neutral, of the corner of the delta, or of the midtap of one phase, are covered. The advantages and disadvantages of grounded vs. ungrounded systems are discussed. Information is given on how to ground the system, where the system should be grounded, and how to select equipment for the ground of the neutral circuits. Connecting the frames and enclosures of electric apparatus, such as motors, switchgear, transformers, buses, cables, conduits, building frames, and portable equipment, to a ground system is addressed.
How to convert watts to lumens
How to convert electric power in watts (W) to luminous flux in lumens (lm).
You can calculate lumens from watts and luminous efficacy.
Watt and lumen units represent different quantities, so you can't convert watts to lumens.
Watts to lumens calculation formula
The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):
ΦV(lm) = P(W) × η(lm/W)
lumens = watts × (lumens per watt)
|2011 | | 1153 pages | PDF | 63.69 Mb|
This book designed to teach by blending concepts relating to electrical theory and principles with practical 'how to' information that prepares you for situations commonly encountered on the job. Topics span all the major aspects of the electrical field including atomic structure and basic electricity, direct and alternating current, basic circuit theory, three-phase circuits, single phase, transformers, generators, and motors. Contents
Introduction: Electrical Occupations
Organization of the Industry
1 SECTION I: Safety, Basic Electricity, and Ohm's Law
|2012 | ISBN: 9535106982 9789535106982 | 404 pages | PDF | 21 MB|
Handbook of electrical safety
1.3 AUTHORITY HAVING JURISDICTION (AHJ)
2.0 GENERAL REQUIREMENTS
2.1 ELECTRICAL MAINTENANCE OR REPAIRS
2.1.1 WORK ON ENERGIZED/DEENERGIZED ELECTRICAL EQUIPMENT
2.1.2 CONSIDERATIONS FOR WORKING ON ENERGIZED SYSTEMS AND EQUIPMENT
2.1.3. SAFETY WATCH RESPONSIBILITIES AND QUALIFICATIONS
2.2 BASIC SAFEGUARDS
English | 2011 | ISBN: 1111425779 | 828 pages | PDF | 22,29 Mb
The objective of this book is to present methods of power system analysis and
design, particularly with the aid of a personal computer, in su‰cient depth
to give the student the basic theory at the undergraduate level. The approach
is designed to develop students’ thinking processes, enabling them to reach a
sound understanding of a broad range of topics related to power system
engineering, while motivating their interest in the electrical power industry.
Because we believe that fundamental physical concepts underlie creative
engineering and form the most valuable and permanent part of an engineering
education, we highlight physical concepts while giving due attention to mathematical
techniques. Both theory and modeling are developed from simple beginnings
so that they can be readily extended to new and complex situations.
|ADVNCES IN WIND POWER|
Today’s wind energy industry is at a crossroads. Global economic instability has threatened
or eliminated many financial incentives that have been important to the development of
specific markets. Such economic sponsorship of energy generation is not unique to
renewables; fossil based sources are also subsidized in many different countries. However,
for a technology like wind energy whose markets are still developing, incentives can be
critical for industry growth. Industry proponents have decreed that long-term energy policy
that survives financial swings and changes in government is what is needed to provide the
stability that market investors seek. While this may be the case, in the mean time, the
pressure is on wind industry designers, manufacturers, and operators to seek the most
effectual measures for wind power production.
List of all mathematical symbols and signs - meaning and examples.
- Basic math symbols
- Geometry symbols
- Algebra symbols
- Probability & statistics symbols
- Set theory symbols
- Logic symbols
- Calculus & analysis symbols
- Number symbols
- Greek symbols
- Roman numerals
In AC circuits, the power factor is the ratio of the real power that is used to do work and the apparent power that is supplied to the circuit. The power factor can get values in the range of 0 to 1.
- Power factor definition
- Power factor calculation
- Power factor correction
Energy harvesting (also known as power harvesting or energy scavenging) is the process by which energy is derived from external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy), captured, and stored for small, wireless autonomous devices, like those used in wearable electronics and wireless sensor networks.
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.Arduino can sense the environment by receiving input from a variety of sensors and can affect its surroundings by controlling lights, motors, and other actuators. The microcontroller on the board is programmed using the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino projects can be stand-alone or they can communicate with software running on a computer (e.g. Flash, Processing, MaxMSP).
The boards can be built by hand or purchased preassembled; the software can be downloaded for free. The hardware reference designs (CAD files) are available under an open-source license, you are free to adapt them to your needs.
How to convert 1 amp to watts
How to convert electric current of 1 amp (A) to electric power in watts (W).
You can calculate (but not convert) the watts from amps and volts:
1A to watts calculation with voltage of 12V DC
For DC power supply, watts are equal to amps times volts.
watts = amps × volts
watts = 1A × 12V = 12W
1A to watts calculation with voltage of 120V AC
For AC power supply, watts are equal to the power factor times amps times volts.
watts = PF × amps × volts
For resistive load without inductors or capacitors, the power factor is equal to 1:
watts = 1 × 1A × 120V = 120W
For inductive load (like induction motor), the power factor can be approximately equal to 0.8:
watts = 0.8 × 1A × 120V = 96W
This book aims to provide a wide variety of radio and electronic projects, from something that will take a few minutes to a more ambitious weekend’s worth. Various construction techniques are described, the simplest requiring no more than a small screwdriver, the most complex involving printed circuit boards. Originally published by the Radio Society of Great Britain, the
projects were all chosen to be useful and straightforward, with the emphasis on practicality. In most cases the workings of the circuit are described, and the projects are backed up by small tutorials on the components and concepts employed. In the 21st century it may seem strange that few of the published circuits use integrated circuits (chips).
There are three basic formats for resume preparation: chronological, functional, and targeted. A combination approach would include features of two or more formats. Although the technical resume uses one of these traditional formats, there are some differences in the content and presentation, since each individual is unique with special characteristics and life experiences.
Spring 2007 ( hack-a-day , Make Magazine, hackedgadgets , Hackzine , hack-n-mod ) Portable, color, tilt-controlled, video game (pic...
An automatic fire alarm system is designed to detect the unwanted presence of fire by monitoring environmental changes associated with combustion. In general, a fire alarm system is classified as either automatically actuated, manually actuated, or both. Automatic fire alarm systems are intended to notify the building occupants to evacuate in the event of a fire or other emergency, report the event to an off-premises location in order to summon emergency services, and to prepare the structure and associated systems to control the spread of fire and smoke.
A sensor is often defined as a device that receives and responds to a signal or stimulus. This definition is broad. In fact, it is so broad that it covers almost everything from a human eye to a trigger in a pistol. The operator adjusts the level of fluid in the tank by manipulating its valve. Variations in the inlet flow rate, temperature changes (these would alter the fluid’s
viscosity and, consequently, the flow rate through the valve), and similar disturbances must be compensated for by the operator.Without control, the tank is likely to flood, or run dry.
Unit protection schemes, formed by a number of relays located remotely from each other, and some distance protection schemes, require some form of communication between each location in order to achieve a unit protection function. This form of communication is known as protection signalling. Additionally communications facilities are also required when remote operation of a circuit breaker is required as a result of a local event. This form of communications is known as inter-tripping. The communication messages involved may be quite simple, involving instructions for the receiving device to take some defined action (trip, block, etc.), or it may be the passing of measured data in some form from one device to another (as in a unit protection scheme). Various types of communication links are available for protection signalling, for example:
THE BEST FOR THE BEST EXECUTION OF WORK
Minute Engineering: Model Traffic Signal with Arduino: So now we know how to set a digital pin to be an input, we can build a project for model traffic signals using red, yellow, and green L...
The supply of electrical energy at competitive prices, in suffi cient quantity and quality, and under the aspect of safe supply through reliable equipment, system structures and devices is of crucial importance for the economic development of countries and for the well - being of each individual. When planning power systems different boundary conditions must be considered, which are based on regional, structural, technical, environmental and fi nancial facts, having a considerable impact on the technical design in many cases. Each investment decision requires a particularly careful planning and investigation, to which power system engineeringand power system planning contribute substantially.
FURTHER CONTENTS ARE IN FOLLOWING FILE
The testing of protection equipment schemes presents a number of problems. This is because the main function of protection equipment is solely concerned with operation under system fault conditions, and cannot readily be tested under normal system operating conditions. This situation is aggravated by the increasing complexity of protection schemes
The last thirty years have seen enormous changes in relay technology. The electromechanical relay in all of its different forms has been replaced successively by static, digital and numerical relays, each change bringing with it reductions and size and improvements in functionality. At the same time, reliability levels have been maintained or even improved and availability significantly increased due to techniques not available with older relay types. This represents a tremendous achievement for all those involved in relay design and manufacture. This chapter charts the course of relay technology through the years. As the purpose of the book is to describe modern protection relay practice, it is natural therefore to concentrate on digital and numerical relay technology. The vast number of electromechanical and static relays are still giving dependable service, but descriptions on the technology used must necessarily be somewhat brief.
FURTHER CONTENTS ARE IN BELOW FILE.