Book description
Electrical Applications 2 covers the BTEC NII level objectives in Electrical Applications U86/330. To understand the applications, a knowledge of the underlying principles is needed and these are covered briefly in the text. Key topics discussed are: the transmission and distribution of electrical energy; safety and regulations; tariffs and power factor correction; materials and their applications in the electrical industry; transformers; DC machines; illumination; and fuse protection. Included in each chapter are worked examples which should be carefully worked through before progressing to the next section. At the ends of chapters, further problems are provided for consolidation and self-testing; where these have numerical answers, they may be found at the end of the book. In a subject such as this, many problems ask for explanations and descriptions and here the answers must be sought in the text. When dealing with a descriptive question, a good diagram almost always helps to give a clear answer and saves many words of explanation. The book aims to promote this approach by the use of over 170 figures throughout the eight chapters.
Table of contents
- Front Cover
- Electrical Applications
- Copyright Page
- Table of Contents
- PREFACE
-
CHAPTER 1. TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY
- Synchronous generators
- Economics of generation and transmission
- Overhead lines
- Comparison between overhead lines and underground cables
- Switchgear, definitions and uses
- Substation layout and equipment
- The three-phase system
- Industrial installations
- Distribution systems
- Distributor calculations
- Problems for Section 1
-
CHAPTER 2. REGULATIONS
- Safety and regulations
- The Electricity Supply Regulations
- Electricity (Factories Act) Special Regulations
- Substations and transformers
- The Institution of Electrical Engineers' Regulations for Electrical Installations
- The Health and Safety at Work Act
- Comparison between the scopes of the regulations
- Problems for Section 2
- CHAPTER 3. TARIFFS AND POWER FACTOR CORRECTION
-
CHAPTER 4. MATERIALS AND THEIR APPLICATIONS IN THE ELECTRICAL INDUSTRY
- Conductor materials for overhead lines and underground cables
- Performance of insulating materials
- Insulating materials for cables
- Cable construction
- Materials used in electronic circuits
- Conductor screening and coaxial cable
- Printed circuits
- Circuit damage due to overcurrents
- Heating of cables
- Permitted volt-drops in cables
- Effect of ambient temperature on rating
- Cables in ducts or in close proximity
- Heat sinks
- The insulation of overhead lines
- Eddy current and hysteresis losses
- Magnetic materials
- Minimisation of losses
- Permanent magnets
- Magnetic screening
- Problems for Section 4
-
CHAPTER 5. TRANSFORMERS
- Principle of action of the transformer
- EMF equation
- The single-phase transformer
- The three-phase transformer
- Transformer cooling
- The auto-transformer
- Advantages of the auto-transformer over the double-wound transformer
- Disadvantages of the auto-transformer
- Current transformers
- Voltage or potential transformers
- Measurement of power and power factor
- Problems for Section 5
-
CHAPTER 6. DC MACHINES
- Principle of action
- Power, force and torque
- Fleming's rules
- The action of the commutator
- The ring-wound armature
- The lap winding
- The wave winding
- The EMF and speed equations
- DC machine connections
- The DC motor
- DC motor starters
- The DC generator
- Armature reaction
- Losses in DC machines
- The power flow diagram
- Problems for Section 6
-
CHAPTER 7. ILLUMINATION
- Lighting standards
- Luminance and luminous intensity
- The lumen and the steradian
- The inverse square law
- The cosine law
- The polar diagram
- Reflection and refraction of light
- Use of the polar diagram
- Indirect illumination of a surface
- Types of lamp
- Types of luminaire
- Daylighting
- Problems for Section 7
- CHAPTER 8. FUSE PROTECTION
- Fault level
- Fuse protection
- Operation of fuses
- The semi-enclosed rewireable fuse
- The high rupturing capacity (HRC) fuse
- Fuse characteristics
- Problems for Section 8
- SOLUTIONS TO PROBLEMS
- INDEX
Product information
- Title: Electrical Applications 2
- Author(s):
- Release date: October 2013
- Publisher(s): Newnes
- ISBN: 9781483140582
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