Tourism business frontiers : consumers, products and industry / edited by Dimitrios Buhalis and Carlos Costa.

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{switchgear}, 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

11 Low-voltage networks
11.1 Introduction
11.2 Air circuit breakers
11.3 Moulded cases circuit breakers
11.4 Application and selective coordination
11.5 Earth leakage protection

12 Mine underground distribution protection
12.1 General
12.2 Earth--leakage protection
12.3 Pilot wire monitor
12.4 Earth fault lockout
12.5 Neutral earthing resistor monitor{NERM}

13 Principles of unit protection
13.1 Protective relay systems
13.2 Main or unit protection
13.3 Back-up protection, etc.

14 feeder protection cable feeders and overhead line
14.1 Introduction
14.2 Translay
14.3 Solkor protection
14.4 Distance protection

15 Transformer protection
15.1 Winding polarity
15.2 Transformer connections
15.3 Transformer magnetizing characteristics
15.4 In-rush current, etc.

16 Switchgear{busbar} protection
16.1 Importance of busbars
16.2 Busbar protection
16.3 The requirements for good protection
16.4 Busbar protection types


17 Motor protection relays
17.1 Introduction
17.2 Early motor protection relays
17.3 Steady-state temperature rise
17.4 Thermal time constant, etc.

18 Generator protection
18.1 Introduction
18.2 Stator earthing and earth faults
18.3 Overload protection
18.4 Overvoltage protection,etc.

19 Management of protection
19.1 Management of protection
19.2 Schedule A
19.3 Schedule B
19.4 Test sheets

Include index: P. 274-277