Page 9 - Industrial Power Engineering and Applications Handbook

VI Contents
10 Installation and Maintenance of Electric 16 Captive (Emergency) Power Generation
Motors Introduction . DG set . Operating parameters . Theory
Installation of bearings and pulleys . Important checks of operation . Guidelines on the selection of a DG set
at the time of commissioning Maintenance of electric . Types of loads . Starting of a DG set . Protection of
motors and their checks . Maintenance of bearings . a DG set . Parallel operation . Procedure of parallel
General problems in electric motors and their remedy . operation . Recommended protection for a
Winding temperature measurement at site . Analysis of synchronizing scheme . Load sharing by two or more
insulation failures of an HT motor at a thermal power generators . Total automation through PLCs
station
11 Philosophy of Quality Systems and Testing Part 111 Voltage Surges,
of Electrical Machines
Philosophy of quality systems . Testing of electrical Overvoltages and Grounding
machines . Procedure for testing . Load test . No-load Practices
test . Tolerances in test results Certification of motors
used in hazardous locations 17 Voltage Surges - Causes, Effects and
Remedies
12 Protection of Electric Motors Introduction . Temporary overvoltages . Voltage surge
Purpose . Unfavourable operating conditions . Fault or a transient . Transient stability of overhead lines .
conditions . Protection . Single-device motor Causes of voltage surges . Definitions . Causes of
protection relays . Summary of total motor protection . steep rising surges . Effect of steep-fronted TRVS on
Motor protection by thermistors . Monitoring of a the terminal equipment (motor as the basis)
motor’s actual operating conditions . Switchgears for . Determining the severity of a transient . Protection of
motor protection . Selection of main components . rotating machines from switching surges . Theory of
Fuse-free system surge protection (insulation coordination)

18 Surge Arresters: Application and
Part II Switchgear Assemblies and Selection
Captive Power Generation Surge arresters . Electrical characteristics of a ZnO
surge arrester . Basic insulation level (BIL) .
Protective margins . Protective level of a surge arrester
13 Switchgear and Controlgear Assemblies . Selection of gapless surge arrester . Classification of
Application . Types of assemblies . Conventional arresters . Surge protection of motors . Pressure relief
designs of switchgear assemblies (also referred to as facility . Assessing the condition of an arrester
switchboards) . Design parameters and service
conditions for a switchgear assembly . Deciding the 19 Circuit Interrupters
ratings of current-carrying equipment, devices and Circuit interrupters . Theory of circuit interruption
components . Designing a bus system . Designing a with different switching mediums (theory of
switchgear assembly . HT switchgear assemblies . deionization) . Theory of arc plasma . Circuit breaking
General guidelines during installation and maintenance under unfavourable operating conditions . Circuit
of a switchgear or a controlgear assembly . Power interruption in different mediums . Current chopping .
circuits and control scheme diagrams . Painting . Virtual current chopping . Containing the severity of
Procedure of switchgear and control gear assemblies switching surges . Comparison of interrupting devices
and treatment of effluent
20 Temporary Overvoltages and System
14 Testing of a Metal-enclosed Switchgear Grounding
Assemblies Theory of overvoltages . Analysis of ungrounded and
Philosophy of quality systems . Recommended tests . grounded systems . The necessity of grounding an
Procedure for type tests . Procedure for routine electrical system . Analysis of a grounded system .
tests . Procedure for field tests An introduction to Arc suppression coil or ground fault neutralizer .
earthquake engineering and testing methods Ground fault factor (GFF) . Magnitude of temporary
overvoltages . Insulation coordination . Application of
15 Instrument and Control Transformers: different types of grounding methods (for HT, HV and
Application and Selection EHV systems) . Important parameters for selecting a
Introduction . Types of Transformers . Common ground fault protection scheme
features of a voltage and a current transformer .
General specifications and design considerations for 21 Grounding Theory and Ground Fault
voltage transformers Precautions to be observed Protection Schemes
while installing a voltage transformer . Current Protection of a domestic or an industrial single phase
transformers . Short-time rating and effect of system . Ground fault on an LT system . Ground fault
momentary peak or dynamic currents . Summary of protection in hazardous areas. . Ground leakage in an
Specifications of a CT Precautions to be observed HT system . Core-balanced current transformers
when connecting a CT . Test Requirements (CBCTs). Ground fault (GF) protection schemes