000			05839nam a2200361 a 4500
999			_c12660 _d12660
003			AR-sfUTN
008			170717s2005 ||||| |||| 00| 0 eng d
020			_a13: 978-0-7506-6397-7; 10: 0-7506-6397-9
040			_cAR-sfUTN
041			_aeng
080			_a621.316.92 H496 _22000
100	1		_aHewitson, L. G. _915641
245	1	0	_aPractical power systems protection / _cL. G. Hewitson, Mark Brown, Ramesh Balakrishnan.
260			_aBurlington, Iowa : _bElsevier, _c2005
300			_a278 p.
336			_2rdacontent _atexto _btxt
337			_2rdamedia _asin mediación _bn
338			_2rdacarrier _avolumen _bnc
490			_aPractical professional books from Elsevier
505	8	0	_aCONTENIDO 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 development of simple distribution systems 2.2 Fault types and their effects 3 Simple calculation of short-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 3.6 Copper conductors 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 Operating characteristics 5.5 British standard 88:1952 5.6 Energy 'let through' 5.7 Application of selection of fuses 5.8 General 'rules of thumb' 5.9 Special types 5.10 General 5.11 IS-limiter 6 Instrument transformers 6.1 Purpose 6.2 Basic theory of operation 6.3 Voltage transformers 6.4 Current transformers 6.5 Application of current transformers 6.6 Introducing relays 6.7 Inverse definite minimum time lag (IDMTL) relay 7 Circuit breakers 7.1 Introduction 7.2 Protective relay-circuit breaker combination 7.3 Purpose of circuit breakers (switchgear) 7.4 Behavior under fault conditions 7.5 Arc 7.6 Types of circuit breakers 7.7 Comparison of breaker types 8 Tripping batteries 8.1 Tripping batteries 8.2 Construction of battery chargers 8.3 Maintenance guide 8.4 Trip circuit supervision 8.5 Reasons why breakers and contactors fail to trip 8.6 Capacity storage trip units 9 Relays 9.1 Introduction 9.2 Principle of the construction and operation of the electromechanical IDMTL relay 9.3 Factors influencing choice of plug setting 9.4 The new era in protection - microprocessor vs electronic vs traditional 9.5 Universal microprocessor overcurrent relay 9.6 Technical features of a modern microprocessor relay 9.7 Type testing of static relays 9.8 The future of protection for distribution systems 9.9 The era of the IED 9.10 Substation automation 9.11 Communication capability 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 case 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 13.4 Methods of obtaining selectivity 13.5 Differential protection 13.6 Transformer differential protection 13.7 Switchgear differential protection 13.8 Feeder pilot-wire protection 13.9 Time taken to clear faults 13.10 Recommended unit protection systems 13.11 Advantages of unit protection 14 Feeder protection cable feeders and overhead lines 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 15.5 Neutral earthing 15.6 On-load tap changers 15.7 Mismatch of current transformers 15.8 Types of faults 15.9 Differential protection 15.10 Restricted earth fault 15.11 HV overcurrent 15.12 Buchholz protection 15.13 Overloading 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 17.5 Motor current during start and stall conditions 17.6 Stalling of motors 17.7 Unbalanced supply voltages 17.8 Determination of sequence currents 17.9 Derating due to unbalanced currents 17.10 Electrical faults in stator windings earth faults phase-phase faults 17.11 General 17.12 Typical protective settings for motors 18 Generator protection 18.1 Introduction 18.2 Stator earthing and earth faults 18.3 Overload protection 18.4 Overcurrent protection 18.5 Overvoltage protection 18.6 Unbalanced loading 18.7 Rotor faults 18.8 Reverse power 18.9 Loss of excitation 18.10 Loss of synchronization 18.11 Field suppression 18.12 Industrial generator protection 18.13 Numerical relays 18.14 Parallel operation with grid 19 Management of protection 19.1 Management of protection 19.2 Schedule A 19.3 Schedule B 19.4 Test sheets
650			_aSHORT-CIRCUIT
650			_aFUSES
650			_aINSTRUMENT TRANSFORMERS
650			_aCIRCUIT BREAKERS
650			_aTRIPPING BATTERIES
650			_aRELAYS
650			_aLOW-VOLTAGE NETWORKS
700	1		_aBrown, Mark
700	1		_aBalakrishnan, Ramesh
942			_cBK _2udc