Marine Electrical Equipment and Practice (eBook)

H D MCGEORGE (Autor)

eBook Download: PDF

2014 | 2. Auflage
168 Seiten
Elsevier Science (Verlag)
978-0-08-093812-7 (ISBN)

Infos

Caters for marine engineer candidates for Department of Transport Certification as Marine Engineer Class One and Class Two. It covers the various items of ships' electrical equipment and explains operating principles.
David McGeorge is a former lecturer in Marine Engineering at the College of Maritime Studies, Warsash, Southampton. He is the author of General Engineering Knowledge.

Inhalt

Front Cover 1
Marine Electrical Equipment and Practice 4
Copyright Page 5
Table of Contents 6
Preface 7
CHAPTER ONE. Batteries and Emergency Systems 8
Lead-acid storage batteries 8
Nickel-cadmium storage batteries 10
Battery charging 14
Standby emergency batteries 15
Battery installations and safety measures 17
Emergency generator 17
Emergency electrical power 19
CHAPTER TWO. Electronic Equipment 21
The structure of an atom 21
Semi-conductor materials 22
Thermistors 23
P- and N-type semi-conductors 24
Solid state devices 25
Semi-conductor junction rectifier (two-layer device) 26
Majority and minority carriers 28
Barrier potential 28
Rectification 29
Zener diodes (two-layer devices) 32
Voltage doubler 34
Transistors 35
Thyristors 37
Silicon controlled rectifiers (SCRs) 38
CHAPTER THREE. A.C. Generators 42
Simple alternator 43
Three-phase systems 44
Stator construction 46
Rotor details 47
Excitation systems 50
Carbon pile regulator 51
Vibrating contact regulator 52
Static automatic voltage regulator 53
The brushless alternator 54
Static excitation system 55
Transient volt dip and alternator response 57
Reference 59
CHAPTER FOUR. A.C. Switchboards and Distribution Systems 60
Power factor 60
Alternator circuit breakers 60
Alternator and system protection 62
Synchroscope 65
Emergency synchronising lamps 67
A.C. earth fault lamps 68
Transformers 68
References 72
CHAPTER FIVE. A.C. Motors 73
Squirrel-cage induction motors 73
Double cage rotor 82
Speed variation 83
Synchronous motor 84
Single-phasing 85
Motor protection 86
Single-phase induction motors 88
CHAPTER SIX. D.C. Generators 90
Practical direct current generator 91
Shunt generator 93
Series generator 95
Compound generator 96
Armature windings and the commutator 98
Lap-wound armature 98
Brushes 99
Armature reaction 102
Interpoles and compensating windings 102
Operation 104
CHAPTER SEVEN. D.C. Switchboards and Distribution Systems 106
Main circuit breaker 106
Generator protection 107
Parallel operation of d.c. generators (with equaliser) 111
Prime movers 113
Earth lamps 113
CHAPTER EIGHT. D.C. Motors 115
Motor construction and operation 115
Resistance starting of d.c. motors 115
Shunt motor starter 116
Types of d.c. motor 117
Speed control of d.c. motors 122
Ward-Leonard system 124
Maintenance of d.c. motors 125
CHAPTER NINE. Safe Electrical Equipment for Hazardous Areas 127
Electrical equipment and flammable atmospheres 127
Safe electrical equipment 128
Flameproof (Ex d) equipment 130
Increased safety (Ex e) equipment 131
Pressurised (Ex p) equipment 131
Non-incendive (Ex n or N) equipment 132
Other methods of protection 132
Intrinsic safety (Ex i) 132
Protection related to types of rotating machinery 133
Tanker installations 135
Installations ashore 136
Reference 136
CHAPTER TEN. Shaft-driven Generators 137
General arrangements 137
Speed variation 139
Static frequency converter for a shaft generator 140
High voltage system for a dredger 142
References 142
CHAPTER ELEVEN. Electric Propulsion 144
D.c. propulsion motors 145
D.c. constant current system 146
D.c. motor supplied from a.c. generators 147
A.c. propulsion motors 148
Turbo-electric propulsion 149
A.c. one-speed drive with C.P. propeller 150
A.c. induction motor drive with C.P. propellers 151
Fixed-speed a.c. generators with variable-speed synchronous motors 151
Cycloconverter 151
References 153
CHAPTER TWELVE. Miscellaneous Items 155
Fuses 155
Incandescent lamps 156
Fluorescent lamps 157
Switch start circuit 157
Shore electrical supply 158
Moving-coil meters 159
Moving-iron meters 160
Electric shock 160
Burns 161
Conditions which increase danger to personnel 161
Shock risk with portable a.c. appliances 162
Index 164

Produkt-Details

• Erscheint lt. Verlag: 28.6.2014
• Sprache: englisch
• Themenwelt: Sozialwissenschaften ► Politik / Verwaltung
• Themenwelt: Technik ► Elektrotechnik / Energietechnik
• ISBN-10: 0-08-093812-4 / 0080938124
• ISBN-13: 978-0-08-093812-7 / 9780080938127