Insulation Measurement and Supervision in Live AC and DC Unearthed Systems [electronic resource] /
Olszowiec, Piotr.author.
Low voltage unearthed (IT) AC and DC systems are commonly applied for supply of power and control circuits in industry, transportation, medical objects etc. The main reasons for their use are high reliability and numerous advantages offered by isolating them against ground. Insulation level is a decisive factor for networks operational reliability and safety. Insufficient insulation-to-ground resistance can cause various disturbances. Though ground faults in IT systems do not make networks operation impossible, they may cause severe problems with their safe functioning. In this book the most important issues concerning normal operation and ground fault phenomena are described in concise form. Numerous methods of insulation resistance and capacitance measurement in live circuits are presented. Important other procedures of  these parameters determination based on measurement and calculation are explained and reviews of selected insulation resistance measurement devices as well as earth fault locating systems are included. For the text understanding merely basic knowledge of electrical circuits theory is required. This book is addressed to electrical engineers, technicians and students of this specialty and may also serve as an academic handbook.
Title; Foreword; Contents; Part I AC IT Systems; General Characteristics; AC IT Systems Circuit Diagrams; Phase-to-Ground Voltages Determination in AC IT Systems; Single-Phase Systems; Three-Phase Systems; Ground Fault and Leakage Currents Calculation; Single-Phase Networks; Three-Phase Networks; Ground Insulation Measurement in AC IT Systems; General Information; Spatial Distribution of Insulation Resistance - Network Insulation Equivalent Circuit; Insulation Parameters Determination in Single-Phase Networks; De-energized Networks; Live Networks
Insulation Parameters Determination in Live Three-Phase NetworksInsulation Equivalent Resistance and Capacitance Values Determination; Insulation Resistance and Capacitance Determination for Single Phases; Unconventional Measurement Methods; Periodical Measurement of Insulation Parameters; Devices and Systems for Ground Fault, Earth Leakage and Shock Currents Measurement; Influence of Insulation Parameters on Possible Ground Fault, Electric Shock and Ground Leakage Currents Levels; Assessment of Ground Fault and Ground Leakage Currents; Assessment of Power Losses in Insulation
Electric Shock Hazard AssessmentGround Fault Current Compensation; References; Insulation Monitoring Systems; Visual Signalization Systems; Other Systems of Continuous Insulation Monitoring; Phase Voltages Monitoring; Zero-Sequence Voltage Component Monitoring; Residual Current Monitoring; Underimpedance System; Systems of Insulation Resistance Continuous Measurement; Measurement Circuits with Test Direct Current; Measuring Circuit with Diode Bridge Rectifier; Other Rectifier Based Measuring Circuits; Measurement Method with an Auxiliary Rectangular Voltage Source
Measurement with Use of Auxiliary AC VoltageReferences; Part II DC IT Systems; Equivalent Circuit Diagrams of DC Networks; DC Network Simplified Circuit Diagram; Equivalent Circuit Diagrams of Batteries; Reference; Insulation Resistance Measurement Methods; Traditional Methods of Insulation Resistance Measurement in Live Networks; Other Analytical Methods; Unconventional Methods of Insulation Resistance Measurement; Evaluation of Errors of Analytical Methods; Devices and Systems for Insulation Deterioration Alarming; Visual Signaling of Insulation Resistance Level
Simple Systems of Continuous Insulation MonitoringReference; Modern Methods of Continuous Insulation Measurement; Measurements with Superimposed AC Test Voltage; Commutation Method; Determination of Insulation Equivalent Resistance of DC Network and Its Single Lines; "Pulse" Test Voltage Method; Unconventional Methods of Insulation Resistance Monitoring; Insulation Supervision with Insulation Leakage Resistance Control; Method of Auxiliary Voltage "Triangle" Pulses; System of Automatic Insulation-to-Ground Capacitance Compensation; References
Ground Fault, Leakage and Electric Shock Currents in DC IT Systems
"Ground Fault, Leakage and Electric Shock Currents in DC IT Systems".
Includes bibliographical references.
Low voltage unearthed (IT) AC and DC systems are commonly applied for supply of power and control circuits in industry, transportation, medical objects etc. The main reasons for their use are high reliability and numerous advantages offered by isolating them against ground. Insulation level is a decisive factor for networks operational reliability and safety. Insufficient insulation-to-ground resistance can cause various disturbances. Though ground faults in IT systems do not make networks operation impossible, they may cause severe problems with their safe functioning. In this book the most important issues concerning normal operation and ground fault phenomena are described in concise form. Numerous methods of insulation resistance and capacitance measurement in live circuits are presented. Important other procedures of  these parameters determination based on measurement and calculation are explained and reviews of selected insulation resistance measurement devices as well as earth fault locating systems are included. For the text understanding merely basic knowledge of electrical circuits theory is required. This book is addressed to electrical engineers, technicians and students of this specialty and may also serve as an academic handbook.
Electronics.
Microelectronics.
Electrical engineering.
Electronics and Microelectronics, Instrumentation.
Electrical Engineering.
Lecture Notes in Electrical Engineering