Tourism business frontiers : consumers, products and industry /
edited by Dimitrios Buhalis and Carlos Costa.
- Amsterdam ; Boston : Elsevier Butterworth-Heinemann, 2006.
- xix, 273 p. : ill. ; 24 cm.
Contents Perface.......................ix 1 Need for protection 1.1 Need for protective apparatus 1.2 Basic requirements of protection 1.3 Basic components of protection 1.4 Summary
2 Faults, types and effects 2.1 The developments of simple distribution systems 2.2 Fault types and their effects
3 Simple calculation of shart- circuit currents 3.1 Introduction 3.2 Revision of basic formulae 3.3 Calculation of short-circuit MVA 3.4 Useful formulae 3.5 Cable information, etc.
4 System earthing 4.1 Introduction 4.2 Earthing devices 4.3 Evaluation of earthing methods 4.4 Effect of electric shock on human beings
5 Fuses 5.1 Historical 5.2 Rewireable type 5.3 Cartridge type 5.4 Operation characteristics, etc.
6 Instrument transformers 6.1 Purpose 6.2 Basic theory of operation 6.3 Voltage transformers 6.4 Current transformers, etc.
7 Circuit breakers 7.1 Introduction 7.2 Protective relay- circuit breaker combination 7.3 Purpose of circuit breakers, etc.
8 Tripping batteries 8.1 Tripping batteries 8.2 Construction of battery changers 8.3 Maintenance guide 8.4 Trip circuit supervision, etc.
9 Relays 9.1 Introduction 9.2 Principle of the construction and operation of the electromechanical 9.3 IDMTL relay 9.4 Factors influencing choice of plug setting, etc.
10 Coordination by time grading 10.1 Protection design parameters on medium and low-voltage networks 10.2 Sensitive earth fault protection