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lighting arrestor connected between the line and earth in a power system
- a)Protects the transmission line against direct lighting stroke
- b)Protects the terminal equipment against traveling surges
- c)Suppresses high frequency oscillations in the line
- d)Reflects back the traveling wave approaching it
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
lighting arrestor connected between the line and earth in a power syst...
Lightning arresters or surge diverters:
- A lightning arrester or a surge diverter is a protective device which conducts the high voltage surges on the power system to the ground
- It consists of a spark gap in series with a non-linear resistor
- The length of the gap is so set that normal line voltage is not enough to cause an arc across the gap, but a dangerously high voltage will break down the air insulation and form an arc
- The property of the non-linear resistance is that its resistance decreases as the voltage (or current) increases and vice-versa
- One end of the diverter is connected to the terminal of the equipment to be protected and the other end is effectively grounded
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lighting arrestor connected between the line and earth in a power syst...
Answer:
The correct answer is option 'B', which states that a lighting arrestor connected between the line and earth in a power system protects the terminal equipment against traveling surges.
Explanation:
A lighting arrestor is a device used to protect electrical power systems from the damaging effects of lightning. It is connected between the line and earth in a power system and provides a low-impedance path for the lightning current to flow safely into the ground.
Role of a Lighting Arrestor:
- Protects the transmission line against direct lightning stroke: While it is true that a lighting arrestor can protect the transmission line against direct lightning strokes by providing a path for the lightning current to discharge into the ground, this is not the primary purpose of a lighting arrestor.
- Protects the terminal equipment against traveling surges: The main purpose of a lighting arrestor is to protect the terminal equipment, such as transformers, switchgear, and other sensitive electronics, against traveling surges caused by lightning strikes on or near the power system. When a lightning strike occurs, it generates a high voltage surge that can travel through the power system and damage equipment. The lighting arrestor diverts this surge to the ground, protecting the terminal equipment from harm.
- Suppresses high frequency oscillations in the line: While a lighting arrestor can help suppress high frequency oscillations in the power system, its primary function is to protect against traveling surges caused by lightning strikes. High frequency oscillations can be caused by various factors, such as switching operations or faults, and can be mitigated by other devices like surge arrestors or filters.
- Reflects back the traveling wave approaching it: A lighting arrestor does not reflect back the traveling wave approaching it. Instead, it provides a low-impedance path for the surge current to flow into the ground, diverting it away from the equipment.
In summary, the primary function of a lighting arrestor connected between the line and earth in a power system is to protect the terminal equipment against traveling surges caused by lightning strikes. It provides a low-impedance path for the surge current to flow into the ground, ensuring the safety of the equipment.
The correct answer is option 'B', which states that a lighting arrestor connected between the line and earth in a power system protects the terminal equipment against traveling surges.
Explanation:
A lighting arrestor is a device used to protect electrical power systems from the damaging effects of lightning. It is connected between the line and earth in a power system and provides a low-impedance path for the lightning current to flow safely into the ground.
Role of a Lighting Arrestor:
- Protects the transmission line against direct lightning stroke: While it is true that a lighting arrestor can protect the transmission line against direct lightning strokes by providing a path for the lightning current to discharge into the ground, this is not the primary purpose of a lighting arrestor.
- Protects the terminal equipment against traveling surges: The main purpose of a lighting arrestor is to protect the terminal equipment, such as transformers, switchgear, and other sensitive electronics, against traveling surges caused by lightning strikes on or near the power system. When a lightning strike occurs, it generates a high voltage surge that can travel through the power system and damage equipment. The lighting arrestor diverts this surge to the ground, protecting the terminal equipment from harm.
- Suppresses high frequency oscillations in the line: While a lighting arrestor can help suppress high frequency oscillations in the power system, its primary function is to protect against traveling surges caused by lightning strikes. High frequency oscillations can be caused by various factors, such as switching operations or faults, and can be mitigated by other devices like surge arrestors or filters.
- Reflects back the traveling wave approaching it: A lighting arrestor does not reflect back the traveling wave approaching it. Instead, it provides a low-impedance path for the surge current to flow into the ground, diverting it away from the equipment.
In summary, the primary function of a lighting arrestor connected between the line and earth in a power system is to protect the terminal equipment against traveling surges caused by lightning strikes. It provides a low-impedance path for the surge current to flow into the ground, ensuring the safety of the equipment.
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lighting arrestor connected between the line and earth in a power systema)Protects the transmission line against direct lighting strokeb)Protects the terminal equipment against traveling surges c)Suppresses high frequency oscillations in the lined)Reflects back the traveling wave approaching itCorrect answer is option 'B'. Can you explain this answer?
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lighting arrestor connected between the line and earth in a power systema)Protects the transmission line against direct lighting strokeb)Protects the terminal equipment against traveling surges c)Suppresses high frequency oscillations in the lined)Reflects back the traveling wave approaching itCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about lighting arrestor connected between the line and earth in a power systema)Protects the transmission line against direct lighting strokeb)Protects the terminal equipment against traveling surges c)Suppresses high frequency oscillations in the lined)Reflects back the traveling wave approaching itCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for lighting arrestor connected between the line and earth in a power systema)Protects the transmission line against direct lighting strokeb)Protects the terminal equipment against traveling surges c)Suppresses high frequency oscillations in the lined)Reflects back the traveling wave approaching itCorrect answer is option 'B'. Can you explain this answer?.
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