Podcast
Questions and Answers
What is the main function of the horn gap arrester?
Which arrester operates based on the principles of an electrolytic cell?
What material is the base of the metal oxide lightning arrester?
What must be done to minimize the soil resistivity when installing lightning arresters?
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What distinguishes the surge arrester from the lightning arrester?
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What is defined as an increase in voltage for a very short time in a power system?
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Which of the following is NOT a cause of external over voltage?
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What potential difference is necessary for a lightning flash to occur between clouds and the ground?
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Transient over voltages can be generated at which of the following frequencies?
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Which type of lightning stroke is characterized by a direct hit?
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Which of these is a common internal cause of over voltage?
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What type of over voltages arise from atmospheric disturbances primarily due to lightning?
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Electrostatic induced over voltages can occur due to which of the following phenomena?
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What is the primary cause of switching over voltages in a power system?
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Which voltage surge is caused when a no load transmission line is suddenly switched on?
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What effect does a Ferranti effect have on a long unloaded power line?
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What is a likely consequence of frequent over voltages occurring in a power system?
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What is identified as a transient voltage or voltage surge in a power system?
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Which overvoltage protection method is commonly used over electrical substations?
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During which operation is over voltage due to current chopping most likely to occur?
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What type of overvoltage is most likely to cause substantial damage in a power system?
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What characterizes the transient nature of voltage surges?
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Why is it important to have protection against abnormal over voltages in a power system?
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What is the primary function of an overhead earth wire in electrical transmission networks?
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How does a lightning arrester function during an overvoltage event?
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What is a key goal of insulation coordination in electrical power systems?
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What type of lightning arrester is currently most commonly used for overvoltage protection?
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Which of the following best describes the term 'Nominal System Voltage'?
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What is the primary function of an overhead ground wire?
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Which material is commonly used for overhead ground wires due to its lightweight and corrosion resistance?
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Why are ground wires placed as the topmost conductor in high voltage transmission lines?
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What is the purpose of grounding the overhead ground wire at substations?
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What action does a lightning arrester take under normal voltage conditions?
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What is a critical angle for the effective shielding of line conductors by ground wires?
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What key property must an overhead ground wire possess to minimize voltage stress on phase conductors during a lightning event?
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Which of the following describes the behavior of a lightning arrester when voltage levels rise?
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What is the role of the corona ring installed on an overhead ground wire?
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What is a characteristic of overhead ground wires in relation to lightning strikes?
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Which of the following types of lightning arresters involves a gap between the ends of two rods?
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What does the spacing between the overhead ground wire and phase conductors ensure?
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In a lightning arrester, what mechanism is used to discharge high voltage through the ionization of air?
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What does the proper installation of overhead ground wires contribute to in power transmission systems?
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What aspect is NOT considered when determining the size of an overhead ground wire?
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