LEADER 05371nam 2200697Ia 450 001 9910457670503321 005 20200520144314.0 010 $a1-280-62919-3 010 $a9786610629190 010 $a0-08-045598-0 035 $a(CKB)1000000000350299 035 $a(EBL)232138 035 $a(OCoLC)475938669 035 $a(SSID)ssj0000225908 035 $a(PQKBManifestationID)11234612 035 $a(PQKBTitleCode)TC0000225908 035 $a(PQKBWorkID)10234681 035 $a(PQKB)10580744 035 $a(MiAaPQ)EBC232138 035 $a(PPN)170247856 035 $a(Au-PeEL)EBL232138 035 $a(CaPaEBR)ebr10138705 035 $a(CaONFJC)MIL62919 035 $a(OCoLC)936898211 035 $a(EXLCZ)991000000000350299 100 $a20050728d2004 uy 0 101 0 $aeng 135 $aurcn||||||||| 181 $ctxt 182 $cc 183 $acr 200 10$aPractical power system protection$b[electronic resource] /$fLes Hewitson, Mark Brown, Ben Ramesh 205 $a4th ed. 210 $aOxford ;$aBurlington, MA $cElsevier/Newnes$d2004 215 $a1 online resource (289 p.) 300 $aIncludes index. 311 $a0-7506-6397-9 327 $aCover; Front matter; Half Title Page; Other titles in the series; Title Page; Copyright; Contents; Preface; 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 327 $a4.1 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; 5.7 Application of selection of fuses; 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 327 $a7.1 Introduction 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 Capacitor 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 327 $a9.5 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 327 $a11.5 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 327 $a13.10 Recommended unit protection systems 330 $aPlant 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 606 $aElectric power systems 606 $aElectrical engineering 608 $aElectronic books. 615 0$aElectric power systems. 615 0$aElectrical engineering. 676 $a621.3121 676 $a621.317 700 $aHewitson$b Les$0979319 701 $aBrown$b Mark$0912866 701 $aRamesh$b Ben$0979320 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910457670503321 996 $aPractical power system protection$92232461 997 $aUNINA