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<p>PART  I.-AC  IT SYSTEMS.-1.  GENERAL  CHARACTERISTICS.-2.  GROUND  INSULATION MEASUREMENT  IN AC IT SYSTEMS.-3.  INSULATION  MONITORING  SYSTEMS.-4.  CONTINUOUS MEASUREMENT SYSTEMS OF INSULATION RESISTANCE</p><p> </p><p>PART  II.-DC IT SYSTEMS.-5. EQUIVALENT  CIRCUIT  DIAGRAMS  OF  DC  NETWORKS.-6.  INSULATION  RESISTANCE  MEASUREMENT  METHODS.-                                                                                    </p><p>7.   DEVICES  AND  SYSTEMS  FOR  INSULATION DETERIORATION ALARMING.-</p><p>8.   MODERN METHODS OF CONTINUOUS INSULATION MONITORING.-9.  EARTH FAULT,  LEAKAGE   AND  ELECTRIC  SHOCK  CURRENTS  IN  DC  IT  SYSTEMS</p><p> </p><p>PART  III.-AC  AND  DC  IT  SYSTEMS.-10.  EFFECTS  OF  AC  AND  DC  IT SYSTEMS INSULATION  FAILURES.-11. INSULATION MONITORS SETTINGS SELECTION.-12.  AC/DC IT SYSTEMS.-13.  EARTH FAULT LOCATION IN AC AND DC IT SYSTEMS.</p><p>

<p> </p><p>Piotr Olszowiec (M.Sc. electrical engineer, Poland), graduated from Academy of Mining and Metallurgy (Cracow), has worked over 30 years at Polaniec Power Plant (Poland). He is an owner of two patents relating to insulation resistance measurement in DC circuits. He is also an author of few papers on electrical protections and measurements and numerous articles on power engineering published in Polish technical periodicals. In 2011 COSiW (Poland) published his first book “Insulation Monitoring in DC Networks” (in Polish) based on gained professional experience. The manual “Insulation Measurement and Supervision in Live AC and DC Unearthed Systems” contains an updated overview of theoretical and practical knowledge about insulation monitoring issues.</p>

<p>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. </p><p>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. </p><p>

Provides insight into important issues concerning AC and DC IT systems incl. a basic theory of operation caused by ground insulation deterioration Presents practical methods of insulation resistance and capacitance measurement in live networks with derivation of formulas Presents commonly used monitoring devices and systems and an explanation of their settings selection