by: Leslie Hewitson Mark Brown Ramesh Balakrishnan
- Publisher: Newnes
- Number Of Pages: 288
- Publication Date: 2005-02-28
- Sales Rank: 654709
- ISBN / ASIN: 0750663979
- EAN: 9780750663977
- Binding: Paperback
- Manufacturer: Newnes
- Studio: Newnes
- Average Rating:
- Total Reviews:
Book Description:
Plant operators, electricians, field technicians and engineers will gain a practical understanding of the role and workings of power system protection systems from this work. An understanding of power systems and their optimized management will increase plant efficiency and performance as well as increasing safety levels. This book provides both the underpinning knowledge and basic calculations needed to understand, specify, use and maintain power protection systems, and the practical techniques required on a daily basis.
After studying this book you will have an excellent knowledge of the principles of protection. You will also have a better understanding of the possible problems likely to arise in day-to-day work with power protection systems.
Key areas of knowledge and expertise developed will include:
* Fundamentals of electrical power protection and applications
* Different fault types
* Perform simple fault and design calculations
* Practical knowledge of protection system components
* Apply relay settings
* Improve the safety of your site with the knowledge gained
* Increase plant efficiency, performance and safety levels by developing your understanding of power system protection
* Gain a practical knowledge of the engineering challenges of power system protection: fault types, component types, relay settings, etc.
* Coverage includes both the fundamentals and the basic fault and design calculations needed to specify, use and maintain power protection systems
Table of Contents
* Cover
* Frontmatter
o Half Title Page
o Other titles in the series
o Title Page
o Copyright
o Contents
o Preface
* Chapter 1. Need for protection
o 1.1 Need for protective apparatus
o 1.2 Basic requirements of protection
o 1.3 Basic components of protection
o 1.4 Summary
* Chapter 2. Faults, types and effects
o 2.1 The development of simple distribution systems
o 2.2 Fault types and their effects
* Chapter 3. Simple calculation of short-circuit currents
o 3.1 Introduction
o 3.2 Revision of basic formulae
o 3.3 Calculation of short-circuit MVA
o 3.4 Useful formulae
o 3.5 Cable information
o 3.6 Copper conductors
* Chapter 4. System earthing
o 4.1 Introduction
o 4.2 Earthing devices
o 4.3 Evaluation of earthing methods
o 4.4 Effect of electric shock on human beings
* Chapter 5. Fuses
o 5.1 Historical
o 5.2 Rewireable type
o 5.3 Cartridge type
o 5.4 Operating characteristics
o 5.5 British standard 88:1952
o 5.6 Energy let through
o 5.7 Application of selection of fuses
o 5.8 General rules of thumb
o 5.9 Special types
o 5.10 General
o 5.11 Is-limiter
* Chapter 6. Instrument transformers
o 6.1 Purpose
o 6.2 Basic theory of operation
o 6.3 Voltage transformers
o 6.4 Current transformers
o 6.5 Application of current transformers
o 6.6 Introducing relays
o 6.7 Inverse definite minimum time lag (IDMTL) relay
* Chapter 7. Circuit breakers
o 7.1 Introduction
o 7.2 Protective relay circuit breaker combination
o 7.3 Purpose of circuit breakers (switchgear)
o 7.4 Behavior under fault conditions
o 7.5 Arc
o 7.6 Types of circuit breakers
o 7.7 Comparison of breaker types
* Chapter 8. Tripping batteries
o 8.1 Tripping batteries
o 8.2 Construction of battery chargers
o 8.3 Maintenance guide
o 8.4 Trip circuit supervision
o 8.5 Reasons why breakers and contactors fail to trip
o 8.6 Capacitor storage trip units
* Chapter 9. Relays
o 9.1 Introduction
o 9.2 Principle of the construction and operation of the electromechanical IDMTL relay
o 9.3 Factors influencing choice of plug setting
o 9.4 The new era in protection microprocessor vs electronic vs traditional
o 9.5 Universal microprocessor overcurrent relay
o 9.6 Technical features of a modern microprocessor relay
o 9.7 Type testing of static relays
o 9.8 The future of protection for distribution systems
o 9.9 The era of the IED
o 9.10 Substation automation
o 9.11 Communication capability
* Chapter 10. Coordination by time grading
o 10.1 Protection design parameters on medium- and low-voltage networks
o 10.2 Sensitive earth fault protection
* Chapter 11. Low-voltage networks
o 11.1 Introduction
o 11.2 Air circuit breakers
o 11.3 Moulded case circuit breakers
o 11.4 Application and selective coordination
o 11.5 Earth leakage protection
* Chapter 12. Mine underground distribution protection
o 12.1 General
o 12.2 Earth-leakage protection
o 12.3 Pilot wire monitor
o 12.4 Earth fault lockout
o 12.5 Neutral earthing resistor monitor (NERM)
* Chapter 13. Principles of unit protection
o 13.1 Protective relay systems
o 13.2 Main or unit protection
o 13.3 Back-up protection
o 13.4 Methods of obtaining selectivity
o 13.5 Differential protection
o 13.6 Transformer differential protection
o 13.7 Switchgear differential protection
o 13.8 Feeder pilot-wire protection
o 13.9 Time taken to clear faults
o 13.10 Recommended unit protection systems
o 13.11 Advantages of unit protection
* Chapter 14. Feeder protection cable feeders and overhead lines
o 14.1 Introduction
o 14.2 Translay (see Figure 14.1)
o 14.3 Solkor protection
o 14.4 Distance protection
* Chapter 15. Transformer protection
o 15.1 Winding polarity
o 15.2 Transformer connections
o 15.3 Transformer magnetizing characteristics
o 15.4 In-rush current
o 15.5 Neutral earthing
o 15.6 On-load tap changers
o 15.7 Mismatch of current transformers
o 15.8 Types of faults
o 15.9 Differential protection
o 15.10 Restricted earth fault
o 15.11 HV overcurrent
o 15.12 Buchholz protection
o 15.13 Overloading
* Chapter 16. Switchgear (busbar) protection
o 16.1 Importance of busbars
o 16.2 Busbar protection
o 16.3 The requirements for good protection
o 16.4 Busbar protection types
* Chapter 17. Motor protection relays
o 17.1 Introduction
o 17.2 Early motor protection relays
o 17.3 Steady-state temperature rise
o 17.4 Thermal time constant
o 17.5 Motor current during start and stall conditions
o 17.6 Stalling of motors
o 17.7 Unbalanced supply voltages
o 17.8 Determination of sequence currents
o 17.9 Derating due to unbalanced currents
o 17.10 Electrical faults in stator windings earth faults phase phase faults
o 17.11 General
o 17.12 Typical protective settings for motors
* Chapter 18. Generator protection
o 18.1 Introduction
o 18.2 Stator earthing and earth faults
o 18.3 Overload protection
o 18.4 Overcurrent protection
o 18.5 Overvoltage protection
o 18.6 Unbalanced loading
o 18.7 Rotor faults
o 18.8 Reverse power
o 18.9 Loss of excitation
o 18.10 Loss of synchronization
o 18.11 Field suppression
o 18.12 Industrial generator protection
o 18.13 Numerical relays
o 18.14 Parallel operation with grid
* Chapter 19. Management of protection
o 19.1 Management of protection
o 19.2 Schedule A
o 19.3 Schedule B
o 19.4 Test sheets
* Index
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