Lightning arrester mcq Dear Readers, Welcome to High Voltage Engineering multiple choice questions and answers with explanation. Substation Design MCQs (Part-3) What does a lightning arrester do in a substation? A Reduces voltage Dec 26, 2021 · The earthing screen and ground wires can well protect the electrical system against direct lightning strokes but they fail to provide protection against traveling waves that may reach the terminal apparatus. e, in parallel with the equipment under protection at Lightning arresters or surge diverters: A lightning arrester or a surge diverter is a protective device that conducts the high voltage surges on the power system to the ground by providing a low impedance path. What is meant by Lightning arrester or surge diverter? A Surge Diverter is a device that is connected between line and earth, i. Raw water system. Dec 27, 2024 · Surge arresters are protective devices that limit the voltage on the equipment by discharging (or) bypassing surge current induced by lightning or a power surge. Protects the terminal equipment against direct lightning stroke . We install the lightning arrester between the line and the earth. which operate under abnormal voltage condition. Whenever lightning strikes, the arrester will instead divert the extra surge current generated to the ground. Probability of sparking between the gaps. Read Also: Lightning Arrester Sep 25, 2023 · Lightning arrester: A lightning arrester or a surge diverter is a protective device which conducts the high voltage surges on the power system to the ground. Answer is: Lightning arrester. 16) What is the name of device used for protection against lightning in over head line? Lightning arrester. Related Substation and equipment MCQ with Answers. Suppresses high-frequency oscillations in the line . These objective type High Voltage Engineering questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma. A lightning arrester connected between the line and earth in a power system . The questions are all in a multiple choice format with 4 Feb 9, 2023 · This article lists 100 Switch Gear and Protection MCQs for engineering students. Mar 24, 2025 · One common application of coaxial cables in power systems is for connecting surge arresters to the ground. The ‘correct’ name (accepted internationally) is ‘surge protection devices’ or ‘SPDs’ – and this nomenclature is used through-out this publication. The document is a 15 question multiple choice assessment exam about electrical substations. 15 mm (for GI plates) or 6. Questions cover topics like the purpose of distribution substations, optimal substation locations, land requirements, gas insulated substation components, transformer arrangements, cost contributions, essential MCQs: For operating power frequency voltages, a surge arrester has to be a - (A) Conductor - (B) Non-conductor A high potential occurs via the down conductor of a lightning arrester due to a lightning strike. total power loss in the network. (c) offers a low resistance path to the surge appearing in a line. reactive and real power flows in each of lines. 5 m, while for a plate electrode, the size of the plate should be at least 60 cm x 60 cm (2 ft x 2 ft) and the thickness should be 3. Answer. Location of Lightning Arrester: The arrangement of this arrester can be done near to the device that is needed to be protected. Else, electricity finds a high tower or tree or wall and travels through them to ground. A thyrite type lightning arrester (a) blocks the surge voltage appearing in a line. 30. , 3. B. What is the primary function of a surge arrester in an electrical system? Mar 28, 2023 · Lightning arrester: Definition: Protection device that protects the circuit from the strokes of lightning is known as a lightning arrester. Offers a low resistance path to the surge appearing in a line . Many factors like system voltages, basic impulse insulation level, arrestor rating, station layout, number and arrangement of lines, the position of isolators, the distance between equipment, etc. Their primary function is to divert or limit the voltage surge to prevent damage to sensitive equipment. The non linear resistance characteristics of ZnO block can be expressed as, Where, I r and V r are the reference current and voltage respectively of the lightning arrester or surge arrester block. Feb 16, 2025 · Electrical Engineering MCQs (Part-52) What is the primary function of a power transformer in a substation? A To regulate current flow D Lightning arrester Explanation Some of the disadvantages of silicon carbide arresters compared to gapless arresters are given below: Silicon Carbide (SIC) arresters have inferior V-I Characteristics compared to Zno arresters (Metal oxide arresters). Prevents development of hazardous potential difference in communication plant by direct bonding, when permissible or by use of surge arresters, discharge gaps, diodes, etc. A thyrite type lightning arrester . (d) returns the surge back to the source. (b) lightning arresters. a high resistance path between line and ground, during operation Show Answer Share your understanding of this question with the correct explanation. but they operate on the same principle which is to provide a low resistance path for surges to the ground. Lightning arrester limits the duration and amplitude of the follow current while a surge absorber reduces the steepness of the wave front for a particular surge. Lightning Arrester|ESE Lightning Arrester & Conventional Iightning Arrester; Lightning Arrester Types|5 Types of Lightning Arresters; Surge Absorber|3 Types of Surge Absorber; Lightning Arrester Objective Questions|Surge Absorber MCQ Questions; Latest Posts Latest Posts in EEE Made Easy Related MCQs. ) are available. Surge arresters protect against all types of transient voltage surges, while lightning arresters focus on lightning strikes. . Feb 19, 2025 · Lightning arrester Lightning arrester also known as surge arrester is used in electrical substations to protect the equipments f allaboutelectrical 4 May, 2024 Explain about WTI (winding temprature indicator) and OTI oil (temprature indicator) in power transformer This document contains 43 multiple choice questions related to high voltage engineering. Explanation: Lightning arrester arrests lightning and allows a safe path of electricity to ground. Feb 4, 2024 · There are different types of lightning arresters like Rod Gap Arrester, Horn Gap Arrester, Valve type, and expulsion type and they differ from each other only in construction details. As the name says, a lightning arrester captures a lightning shockwave and provides it an alternative shorter path through itself thus protecting the costly and sensitive power system infrastructure. Mar 25, 2025 · Surge diverters: Surge diverters, also known as surge arresters or surge protectors, are devices designed to protect electrical systems and equipment from transient overvoltages, such as those caused by lightning strikes or switching surges. vvddo2nd channel- https://youtube. Thus, its location is in parallel with the equipment. lightning: An electric discharge between cloud and earth, between clouds or between the charge centres of the same cloud is known as lightning. com/store/apps/details?id=co. Jan 14, 2025 · Standard Lightning Arrester (LA) Ratings. This table documents how well the arrester clamps lightning and switching surges, which is the fundamental purpose of arresters. ANSWER= (B) To relieve water hammer pressure in penstock Explaination:- The functin of surge tank in hydro power plant is To relieve water hammer pressure in penstock Check Answer . May 4, 2024 · Lightning arrester also known as surge arrester is used in electrical substations to protect the equipments from voltage spikes caused by sky lightning or other disturbances it diverts the high voltage spikes to the ground by providing low impidance path to the ground. Isolator. Protects the terminal equipment against direct lightning stroke For protection of rotating machines against lightning surge . Fuel oil system. Oct 29, 2020 · Electrical Engineering MCQ on The location of the Lightning arrester is near with answer, solution for Electrical Engineering exams, job tests, university and college exams, interviews. is used . Summary. In which type of bus the magnitude and the phase angle of the voltage are known ?, 2. Lightning arrester . Rod gap arrester . Transformer oil plant. A lightning arrester connected between the line and earth in a power system . Valve type lightning arrester Rod Gap Arrester:- A Rod Gap Arrester is a simple type of diverter used in electrical systems to protect against high voltage surges, particularly those caused by lightning strikes. So, it will break down the insulation of the lightning arrestor for a moment, so voltage surge can be discharged toward the ground. The lightning strokes are nothing but surges with high transient voltage, arcs of isolation, spark, and surge currents because of Jul 1, 2024 · 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 Related Post: Difference Between MCB, MCCB, ELCB & RCD Difference between Surge Arrester and Surge suppressor. names (including ‘lightning barriers’, ‘surge arrestors ‘, ‘lightning protection units’, etc. Lightning Arresters (LAs) are rated based on their Rated Voltage (Ur), which is defined by #IEC 60099-4. The basic cells of thyrite are used inside this type of lightning Arrester. 11 & IEC standard 60099-4 specify the requirements for surge arresters. A lightning arrester is located near to a :, 7. Expulsion type lightning arrester 5. providing low resistance path for the surges to the ground. It is typically placed very close to the electrical equipment that it is protecting, and its main function is to divert the high-voltage wave of Jan 27, 2025 · What is the primary function of a lightning arrester in a substation? What function does a lightning arrester serve in maintaining the reliability of a substation? A thyrite type lightning arrester . Its function is not to stop the flow of electric current, but rather to safely conduct the lightning-induced overvoltages (which exceed the system’s normal operational voltage) to the ground. nick. com/@SelectionSafarVK?si=fbi2u4U-SCwnRzfRMaster cou Nov 29, 2024 · Transient overvoltages occur on all power systems. These ratings are designed to match standard power system voltages and provide effective overvoltage protection. 17) 9 For operating power frequency voltages, a surge arrester has to be a A Conductor. A lightning arrester, often referred to as a surge arrester, plays a critical role in diverting the high-voltage surges safely to the ground, preventing damage and ensuring safety. While arresters can be used to effectively control the most frequent type of such overvoltages, namely those caused by switching operations, transients due to lightning are more difficult to mitigate. Combination of lightning arrester and a capacitor . Jul 29, 2021 · A lightning arrester or a surge diverter is a protective device that 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 Feb 6, 2021 · · It should be noted that designing a lightening arrester that when the surge is over the arc in gap should cease. Multigap May 3, 2024 · Explanation: A lightning arrester is designed to protect electrical equipment and systems from the potentially devastating effects of lightning strikes. IEEE standard C62. Answer: C Sep 27, 2023 · Lightning Arrester Objective Questions|Surge Absorber MCQ Questions September 27, 2023 by EEE Made Easy In this Post, Lightning Arrester Objective Questions and answers are give. This document contains 25 multiple choice questions related to electrical distribution systems and power system concepts such as load factor, diversity factor, coincidence factor, demand factor, and load curves. Dec 2, 2021 · The crucial reason for exhibiting failure modes in surge arresters is a dielectric breakdown which corresponds that the device is not able to tolerate applied voltage levels. Power System A lightning arrester is a type of protective equipment that is placed in the vicinity of a power system component. 49). This will prevent the surge current from entering the transformer and damaging it. Arrester Ratings: MCOV and Rated Voltage Types of lightning arresters : 1. Common Standard LA Ratings:- Feb 13, 2025 · Download app now- https://play. Related MCQs. Returns the surge back to the source Feb 24, 2012 · The current carrying capacity of the surge arrester block is proportional to the total cross-section of the block. It must be noted that it will work only if the arrester is connected in parallel to any equipment. There is no significant difference in their functionality. To mitigate this risk, lightning arresters are essential components in protecting buildings and electrical installations. Lightning arresters are specifically designed for outdoor use. Capacitor . (b) absorbs the surge voltage appearing in a line. The protection against direct lightning strokes and high voltage steep waves is provided by (a) ground wires. Lightning arresters are used in power systems to protect electrical equipments against The principal information obtained from load flow studies in a power system are 1. a high impedance path between line and ground, during operation C. Once the surge has passed away, the thyrite regains its original resistance value at normal voltages without any permanent chemical changes. Definition of Lightning Arrester: The protective device used for protection of the electrical equipment against any power surges caused by lightning impulse voltage and surges is a lightning arrester or surge arrester. D. Jul 12, 2024 · The purpose of a surge arrester in a power system is to protect against: A) Overcurrent conditions More MCQs on Electrical Engineering (Power) MCQs. The main difference between surge suppressor and surge arrester is that surge suppressor has low voltage rating slightly greater than the normal voltage rating with low energy dissipation capability while surge arrester has fair high voltage rating than the rated voltage with far 14. 3. 9. These may be, for example, cables for power supply and signal transmission or devices inside the building. Dec 29, 2024 · Concept:-When a pipe electrode is used for earthing, the length of the pipe should be at least 2. What is the minimum phase to phase clearance required for 400kV conductors in substation: a) 3500 mm b) 4200 mm c) 5000 mm d) 4500 mm Dec 30, 2022 · A lightning arrester, also known as a surge arrester, is a device that is used to protect electrical equipment and circuits from damage due to high voltage surges, such as those caused by lightning. Types of lightening arrester: 1 . 2. The moisture ingress implies Related Substation and equipment MCQ with Answers. The lightning strokes are nothing but surges with high transient voltage, arcs of isolation, spark, and surge currents because of lightning, etc Sep 19, 2021 · This type of lightning arrester is more effective than the electrolytic type lightning arrester. The simplest form of motor controller is :, 4. A lightning arrestor connected between the line and earth in a power system The order of the lightning discharge current is : Earth wire on EHV overhead transmission line is provided to protect the line against Jun 27, 2021 · Hence, during a lightning surge, it allows the current through it to the earth. Protects the terminal equipment against travelling surges B. C. a low resistance path between line and ground, during operation D. 8. They differ only in constructional details, but operate on the same principle viz. In large substations, arrestors should be installed at take-off points of the lines and of the terminal apparatus. Multigap arrester 4. This example is for a station class arrester but can be used to understand all discharge voltage tables of all arresters. The functin of surge tank is ? A) To supply water at constant pressure B) To relieve water hammer pressure in penstock C) both of the above D) none of the above . Hi friends, in this article, I am going to discuss the lightning arrester types and lightning arrester working principle. Surge arrestors are designed to limit the current and voltage that flows through a circuit, and they are typically installed inside the panel board to protect the insulation, equipment, and machines from transient voltage produced by switching, sparks, load . Lightning Arrester must provide maximum resistance to normal voltage and negligible impedance to surge voltages. You will find this article very interesting and informative, I hope so. D None of these. Generally, these are connected among ground and phase within an AC system, pole & ground within the DC Keywords: Power system overvoltage, surge arrester, insulation co-ordination, protection level, dielectric strength, insulation level, standard waveshape, representative voltage, co-ordination withstand voltage, required withstand voltage, standard rated MCQ -01 - Free download as PDF File (. A thermal protection switch provides protection against what? Distance protection scheme is preferred over graded lime-lag over-current protection in HV and EHV lines because Which of the following devices will receive voltage surge first travelling on the transmission line ? Which among these systems is an auxiliary plant in a power system? A. The coaxial cable provides a low-impedance path to the ground for the surge arrester, which helps to dissipate Related Substation and equipment MCQ with Answers. Nov 1, 2021 · A lightning arrester provides A. None. a low impedance path between line and ground, during operation B. The lightning arresters or surge diverters provide protection against such surges caused by indirect lightning stroke. (c) lightning arresters and ground wires. An electrical field is created between the down conductor and other parts with a low potential. C Semiconductor. Sep 23, 2024 · What is Lightning Arrester? A lightning arrestor, also known as a surge arrestor or a lightning diverter, is a protective device that safeguards electrical equipment from transient overvoltages caused by lightning or switching impulses. 17) Which is the function of a the arrester in question. 4. Hint. Thus it is a safe place inside a house that has a lightning arrester on the top of it. What is the primary function of a lightning arrester in a power system? A Power generation B Surge protection Feb 13, 2018 · 1. pdf), Text File (. When a voltage surge induced by a nearby lightning stroke, or caused by switching, reaches an arrester, it finds a lower resistance path to ground than that presented by the equipment or line. B Non-conductor. All of these Oct 29, 2017 · The lighting arrestor is conducted b etween line and earth. Horn gap arrester . Otherwise if the arc does not go out , the current would continue to flow through the resister and both resister and gap may be destroyed. Surge arresters are used to protect power equipment from voltage surges caused by lightning strikes or other transient events. The other surge arrester failure modes are: Contact with moisture – This is the other common reason that makes a surge arrester failure. Blocks the search voltage appearing in a line . Absorbs the surgery voltage appearing in a line . you can find MCQs on surge absorbers also. Reflects back the travelling waves approaching it Feb 5, 2024 · A. Therefore these are not safe places to take shelter during lightning. To reduce the steepness of wave front, _____is used . Sharpen your electrical skills and confidently tackle questions in your upcoming interview. Answer & Explanation Feb 27, 2022 · Types of Lightning Arrester: Horn Gap Arresters; Multi-Gap Arresters; Valve-Type Arresters; Pellet-Type Arresters Location of Lightning Arrester: The arrangement of this arrester can be done near to the device that is needed to be protected. Surge arresters handle higher voltages than lightning arresters. Concept: Lightning arrester: Definition: Protection device that protects the circuit from the strokes of lightning is known as a lightning arrester. Principle : Lead peroxide is a good conductor of electricity at room temperature but at about 150° C, it becomes the insulator because it is converted into the lead when it is heated 43. txt) or view presentation slides online. Horn gap arrester 3. Returns the surge back to the source Jan 30, 2024 · Surge Arresters 100 MCQs For Thorough Preparation. The questions cover topics such as applications of high voltage, components of power systems, specifications of transmission lines in India, causes of overvoltage, lightning and its characteristics, insulation coordination, and surge arrester basics. Download these Free Secondary Distribution MCQ Quiz Pdf and prepare for your upcoming exams Like Banking, SSC, Railway, UPSC, State PSC. Generally, these are connected among ground and phase within an AC system, pole & ground within the DC Sep 26, 2023 · Types of Lightning Arresters: There are several lightning arrester types in general use. The value of x is 30 to 40 in case Requirements of an efficient Lightning Arrester. 16) Lightning arrester. What is the main function of a lightning arrester in a substation? A Prevent overheating B Regulate voltage Oct 13, 2022 · The arrester is always at ground potential. It is known as surge diverter. The lighting arrester is conducted -, 5. What is the standard form of GMAW? Feb 16, 2025 · What is the primary function of a lightning arrester in a power system? A To step up voltage levels B To protect the system from overvoltage caused by lightning May 13, 2018 · Lightning arresters or surge diverters: Lightning arrester is a device for protecting an electrical apparatus from damage by lightning. have to be taken into account in fixing the location of the arrestors. Sep 27, 2023 · Lightning Arrester Objective Questions|Surge Absorber MCQ Questions September 27, 2023 In this Post, Lightning Arrester Objective Questions and answers are give. Lightning or surge arresters serve the same purpose on an electric circuit or line as a safety valve on a boiler. A lightning arrestor is usually located nearer to -, 6. Jan 26, 2025 · Electrical MCQ; January 26, 2025 How Engineering Works. 𝐈𝐧 𝐭𝐡𝐢𝐬 𝐯𝐢𝐝𝐞𝐨, 𝐈 𝐰𝐢𝐥𝐥 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐦𝐨𝐬𝐭 𝐢𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 𝐌𝐂𝐐𝐬 𝐨𝐟 Jan 2, 2025 · Get Secondary Distribution Multiple Choice Questions (MCQ Quiz) with answers and detailed solutions. Lightning conductor and arrester Nov 29, 2020 · Types of Lightning Arrester: Horn Gap Arresters; Multi-Gap Arresters; Valve-Type Arresters; Pellet-Type Arresters . (d) earthing of neutral. Lightning Arrester must have a low impulse spark over-voltage and residual voltage in order to decrease the Basic Insulation level of the protected equipment. It tests knowledge of substation components, configurations, ratings and safety practices. 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 Sep 26, 2023 · Read More on Lightning Arrester. 17) Which is the function of a Dec 20, 2022 · The lightning arrestor working principle is that once the voltage surge travels throughout the conductor, it reaches the arrestor's location where it is installed. google. magnitude and phase angle of the voltage at each bus. A. Decrease in energy absorption (surge wave) capability compared to Zno arresters. 35 mm (for copper plates). Jan 27, 2025 · Electrical MCQ; January 27, 2025 How Engineering Works. Lets check each of the Lightning Arrester Types in detail. How the insulation on any power system is protected is basically an economic issue. It consists of a spark gap in series with a non-linear resistor Dec 30, 2022 · Surge arrestors, also known as surge protectors, are devices that are used to protect electrical equipment from voltage spikes and surges. Protects the terminal equipment against travelling surges . Sep 16, 2012 · 3. Rod gap arrester 2. dsjdkq uwuvy ruuxyq fdtfe wqisduq nnjeo wusemkj zyf bvvhmn vuwd apyuhpcn rvbhq bvllxy lndr pdckdk