3 May 7, 2020 May 7, 2020 mcqelectrical4u. This relay is mainly used in oil immersed transformer for providing protection against all types of … Buchholz relay in a transformer is an oil container housing the connecting pipe from the main tank to the conservator tank.It has mainly two elements. b) Conductors MCQ on Electrical Transformers. These MCQs are very important & helpful for campus placement test, semester exams, job interviews and competitive exams. 1.A single phasing relay can be used with, a) 1ɸ motor It is the gas actuated relay. Buchholz relay is a mechanically operated relay that is used to protect the transformer from internal faults that occur inside the transformer tank like an inter-turn fault.Buchholz relay is an oil and gas-operated device. c) Insulators d) Inner and bound electrons are always present in the semiconductor. protect the transformer from catastrophic failure. Buchholz Relay | Buchholz Relay Objective Type Questions and answers; 6. … Multiple Choice Question (MCQ) of Electronics page-15:211. Temperature . 10. The conduction in JEFT is always by the a) 0.0001 sec b) 0.001 sec c) 0.01 sec d) 0.1 sec Ans: (c) 9. It is not used in small transformer because of economic consideration. Ans: (b), a) Air gap Since that time it has been an important protection and monitoring device for insulating liquid filled transformers with conservator and choke coils. Buchholz relay is a gas-actuated relay installed in oil immersed transformers for protection against all kinds of faults. The Buchholz relay also takes over the function of an oil level indicator when there is not enough oil in the conservator or when there is an oil leak. Buchholz's relay gives warning and protection against a) electrical fault inside the transformer itself b) electrical fault outside the transformer in outgoing feeder c) … Answer/ Hint Answer : D Explanation : 17. The Buchholz relay is a gas operated relay used for the protection of oil immersed transformers against all the types of internal faults. 10 Ans: (b). 592. buchholz relay testing This operation shall not be adversely affected when the alarm contact has already.In the field of electric power distribution and transmission, a Buchholz relay is a safety device. c) The saturation voltage VCE for silicon transistor is same as that for germanium. Electrical Engineering. 8 Buchholz relay is used to protect against. B. Directional overcurrent relay. (b) overloads. Instrument transformers. Air cooled transformers. Buchholz Relay in Transformers | Buchholz Relay Operation and Principle Hi I am Er. The materials whose electrical conductivity is usually less than 1 × 106 mho/m are An overcurrent relay having a current setting of 150% is connected through a 400/5 CT. What are the uses of Buchholz’s relay? d) Motors The Buchholz relay is used as a protective device sensitive to the effects of dielectric failure inside the equipment. The Buchholz relay is placed between the main tank and the conservator. Mercury switches in turn actuated alarm and trip … A Buchholz relay is used to monitor large transformers for oil loss or insulation breakdown. Buchholz relay is a gas-actuated relay which is used for protection of oil filled transformers/reactors fitted with conservators against low oil level and internal faults. The square waveform of current has following relation between r.m.s value and average value A. r.m.s. C. Distribution transformers . The slow developing faults called incipient faults in the transformer tank below oil level operate Buchholz relay which gives an alarm. It is used for the protection of a transformer from the faults occurring inside the transformer, such as impulse breakdown of the insulating oil, insulation failure of turns etc. Basically, Buchholz relay is a gas actuated relay installed in oil immersed transformers for the protection against all kinds of faults. D. Oil immersed power transformers of rating above 500 kVA. Ans: (a), a) Transformer Located in the conservator tank B. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL … Buchholz relay is a safety device which is generally used in large oil immersed transformers (rated more than 500 kVA). c) Alternator Mechanical Engineering. Ans: (a), a) Load (d) Directional relay. MCQ's Search Engine. c) Both (a) and (b) 10.Buchholz’s relay gives warning and protection against (a) electrical fault inside the transformer itself (b) electrical fault outside the transformer in outgoing feeder c) Rotor faults d) The saturation voltage VCE for silicon transistor is lower than germanium transistor. Can't read the image? B. « Back CONTENTS Next » 1. Buchholz Relay Definition: The Buchholz relay protects the transformer from internal faults. (a) Differential relay. Question is ⇒ Buchholz relay is used for, Options are ⇒ (A) protection of a transformer against all internal faults., (B) protection of a transformer against external faults., (C) protection of a transformer against both internal and external faults., (D) protection of induction motors., (E) , Leave your comments or Download question paper. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. An earth-fault relay used for it is essentially an overcurrent relay of low setting and operates as soon as earth fault or leak develops. A. Economics of Operation page-2, Objective Type Question or MCQ of B. Generally, Buchholz relay is used for the protection of power transformer of reading exceeding 500 KVA. d) All of these d) All of these Civil Engineering . A. Provided when transformer rating is from 500KVA upto 750KVA. Ans: (c), a) Impedance type Types of internal faults. a) UJT Electronics Engineering. b) Back up stop a) Semiconductors d) Every internal faults 5 IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Economics of Operation page-4, Objective Type Question or MCQ of B. Economics of Operation page-5, Objective Type Question or MCQ of B. Buchholz Relay of Transformer and Working of Buchholz Relay. IDMT relays are used to protect the power transformers against (a) external short-circuits. Reply. Economics of Operation page-1, Objective Type Question or MCQ of Power System Protection page-8, Objective Type Question or MCQ of Power System Protection page-7, Objective Type Question or MCQ of Power System Protection page-6, Objective Type Question or MCQ of Power System Protection page-5, Objective Type Question or MCQ of Power System Protection page-4, Objective Type Question or MCQ of Power System Protection page-3, Objective Type Question or MCQ of Power System Protection page-2, Objective Type Question or MCQ of Power System Protection page-1, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-11, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-10, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-9, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-8, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-7, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-6, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-5, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-4, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-3, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-2, Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-1. 1 ELECTRICAL ENGINEERING MCQ_38. The pickup value of current is: 2.5 A; 5 A; 7.5 A; 10 A; Correct answer: 3. D. Buchholz relay. C. Connected in the pipe connecting main tank of transformer and conservator, D. Oil immersed power transformers of ratings above 500 kVA. c) Sense the fault and direct to trip the circuit breaker Bucholz relay is used to give an alarm in case of incipient( slow-developing) faults in the transformer and to connect the transformer from the supply in the event of severe internal faults. 591. B. d) None of the above, Multiple Choice Question (MCQ) of Electronics page-13:181. Instantaneous relay should operate within. (c) IDMT relay. One method of protection against earth faults in transformers is the core-balance leakage protection. A. (b) Bucholoz relay. a) Inter-turn fault b) External faults c) Rotor faults d) Every internal faults Ans: (d) 8. b) Bound electrons are always present in the semiconductor. HOW DOES A BUCHHOLZ RELAY WORK? Economics of Operation page-6, Objective Type Question or MCQ of B. b) MHO type Buchholz relay are used on. Mcq Added by: Muhammad Bilal Khattak. Buchholz relay is used to clear internal faults of transformer like inter-turn faults, winding faults, and core faults. d) Alloys, Multiple Choice Question (MCQ) of Electronics page-14:196. c) Less than voltage element torque d) All of these Medical Science Engg. : B. c) Number of ampere turns […] Which of the following statement is true? 2. b) Sense the fault C. Plain impedance relay. An inductance of one H carrying a current of two amperes will store the energy of A. 7 The upper element consists of a float. Answer: Buchhols relay is one of the most important equipment used in power system. The Buchholz relay protects a transformer from. b) Minority carriers Chemical Engineering. b) Internal faults Ans: (c), a) Directional type (c) internal short-circuits. d) All of these The Buchholz relay was developed in 1921 by Max Buchholz, Oberrat (senior councillor) at Preußische Elektrizitäts-A.G. (Prussian electricity company) in Kassel. c) Free electrons are always present in the semiconductor. The instantaneous relays used for earth fault detection in motors is usually set to _____: 50% of the RLA 50% of the FLA 20% of the RLA 20% of the FLA; Correct answer: 4. c) 3 ɸ motor In which of the following device the base resistors are not added in the package but added externally? Ans: (c), a) Break the fault current Biased differential relay. Economics of Operation page-3, Objective Type Question or MCQ of B. MHO relay is inherently a. a) Directional type b) Non-directional type c) Unidirectional type d) None of these Ans: (a) 10. c) Unidirectional type d) 0.1 sec b) 2r ɸ motor 2 joules C. 4 watts D. 4 joules Ans. Such type of relay is used in the transformer having the rating higher than 500KVA. Power System Protection is focused on the implementation of schemes and procedures for protecting electrical power systems against faults. An overview of the advantages of the MSafe The MSafe® Buchholz relay impresses with its robust construction in which more than 100 years of experience in measurement, regulation and safety technology have been invested. Buchholz relay can detect faults..........oil level in the transformer. secondary quantities and a possibility of current through the relay even when there is no fault. b) Greater than voltage element torque c) Reactance type What is Buchholz Relay? During normal transformer operation the relay allows oil flow between the conservator … Short circuit faults such as inter turn faults, incipient winding faults, an… e) Holes and electrons simultaneously, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-20, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-19, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-18, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-17, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-16, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-15, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-14, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-13, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-12, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-11, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-10, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-9, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-8, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-7, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-6, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-5, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-4, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-3, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-2, Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-1, Objective questions and answers or MCQ of Electrical Machines page-22, Objective questions and answers or MCQ of Electrical Machines page-21, Objective questions and answers or MCQ of Electrical Machines page-20, Objective questions and answers or MCQ of Electrical Machines page-19, Objective questions and answers or MCQ of Electrical Machines page-18, Objective questions and answers or MCQ of Electrical Machines page-17, Objective questions and answers or MCQ of Electrical Machines page-16, Objective questions and answers or MCQ of Electrical Machines page-15, Objective questions and answers or MCQ of Electrical Machines page-14, Objective questions and answers or MCQ of Electrical Machines page-13, Objective questions and answers or MCQ of Electrical Machines page-12, Objective questions and answers or MCQ of Electrical Machines page-11, Objective questions and answers or MCQ of Electrical Machines page-10, Objective questions and answers or MCQ of Electrical Machines page-9, Objective questions and answers or MCQ of Electrical Machines page-8, Objective questions and answers or MCQ of Electrical Machines page-7, Objective questions and answers or MCQ of Electrical Machines page-6, Multiple Choice Question (MCQ) of Protective Relays page-4, Multiple Choice Question (MCQ) of Protective Relays page-3, Multiple Choice Question (MCQ) of Protective Relays page-2, Multiple Choice Question (MCQ) of Protective Relays page-1, Multiple Choice Question (MCQ) of Circuit Breaker page-3, Multiple Choice Question (MCQ) of Circuit Breaker page-2, Multiple Choice Question (MCQ) of Circuit Breaker page-1, Objective Type Question or MCQ of B. C. Winding to winding fault. 9 During normal operation, the flow speed V through the pipe towards the.The Buchholz Relay is used to protect the transformer when a malfunction. Used in oil cooled transformer and installed between main tank and conservator. Thermal overload relays are used to protect the motor against over current due to_____? b) Overhead line equipment b) Non-directional type Buchholz relay is not provided in relays having rating below 500 kVA from the point of view of economic considerations. u sir. It is a type of oil and gas actuated protection relay. A. value of current is greater than the average value B. r.m.s. c) PUT 6 Switchgear and Protection Switch gear and Protection. (d) external short-circuits and overloads. Answer/ Hint Ans: (d), a) 0.0001 sec Automobile Engineering. b) 0.001 sec Ans: (b), a) Inter-turn fault d) None of these Located in the transformer tank itself C. Connected in the pipe connecting main tank of transformer and conservator D. Installed in the circuit breaker d) Electrons Which of the following relay is used to detect and protect internal fault of a transformer? Leave a Reply Cancel reply. 2 watts B. The Buchholz relay is provided with two hinged floats/buckets which on tilting operate mercury switches inside the oil tight enclosure. d) None of these Buchholz relay is . D. None of these. Computer Engineering. Named afteri ts inventor mr. Max Buchholz (1875–1956) in 1921, relay is used to produce an alarm in case of incipient (i.e.slow-developing) faults in the transformer and to disconnect the transformer from the supply in the event of … b) The saturation voltage VCE for germanium transistor is more than silicon transistor. 10. < 2 Explanation:-Distance relay: A relay which measures impedance or a component of the impedance at the relay location is known as a distance relay. Light intensity . Multiple Choice Question (MCQ) of Electronics page-16:226. C. Resistance, reactance or impedance . It provide protection against internal faults of transformer. Protective relays can be designed to respond to . This protective device is named after the inventor Buchholz. Next>, Enter the code above here : 4 Your email address will not be published. A. short-circuits B. heavy loads C. grounds D. all of the above. Solution: 5 * 1.5 = 7.5 A. b. It is simply a gas actuated relay. In electric power distribution and transmission, a Buchholz relay is a safety device mounted on some oil-filled power transformers and reactors, equipped with an external overhead oil reservoir called a "conservator". Which of the following statement is correct? The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the Buchholz relay Container. a) Inner electrons are always present in the semiconductor. 7.5 A. Protective Relay | Protective Relay Objective Type Questions and answers; 1. Introduction to Buchholz Relay. Electrical Engineering MCQ1 The most dangerous fault2 Heavy current fuses have wires that are in diameter than smaller ones3 The pickup current of a relay having 125% current setting connected to 100/5 transformer is4 Which device […] For the protection of stator winding of an alternator against internal fault involving ground, the relay used is a. Contact us: info@mechanicaltutorial.com, Connected in the pipe connecting main tank of transformer and conservator, Oil immersed power transformers of ratings above 500 kVA, Switchgear and Protection objective Q & A part-3, ☞Switchgear and Protection objective Q & A part-1, ☞Switchgear and Protection objective Q & A part-2, ☞Switchgear and Protection objective Q & A part-4. c) 0.01 sec A turn to turn fault. Allbro’s Buchholz Relay complies with the latest CENELEC EN 50216-2 and EN 50216-2 standards. Buchholz relay is used for the protection of transformers from the faults occurring inside the transformer. It is operated by gas pressure not by electromagnetic action. Multiple Choice Question (MCQ) of Electronics page-17:241. b) CUJT d) None of these Distance Relay. It is used for the protection of a transmission line. Buchholz relay is a type of oil and gas actuated protection relay universally used on all oil immersed transformers having rating more than 500 kVA. a) Majority carriers a) The saturation voltage VCF of silicon transistor is more than germanium transistor. Ans: (c), a) Equal to voltage element torque A. B. The Buchholz Relay is fitted in the pipework between the transformer itself and the conservator at a 2.5 to 5 degree angle. According to the history, this relay is named after Max Buchholz in 1921. c) Holes b) External faults View of economic considerations than germanium transistor: 3 4 joules Ans conservator, D. oil immersed power of... The pipework between the transformer than 500KVA in which of the above insulation breakdown the speed. External faults c ) 0.01 sec d ) Inner and Bound electrons are present... Connected in the transformer tank below oil level operate Buchholz relay is named after the inventor Buchholz 0.001... Very important & helpful for campus placement test, semester exams, job and... And average value A. r.m.s tilting operate mercury switches inside the oil tight enclosure same that... Not by electromagnetic action it has been an important protection and monitoring device for insulating liquid filled transformers conservator. Average value B. r.m.s core-balance leakage protection choke coils between the transformer always present in package! That above POSTED MCQ is WRONG THINK that above POSTED MCQ is WRONG greater than average. Placement test, semester exams, job interviews and competitive exams with the latest CENELEC EN 50216-2 standards speed. Of Buchholz relay can detect faults.......... oil level operate Buchholz relay protects the transformer for campus test. Is same as that for germanium is one of the above protective device sensitive the! Exceeding 500 kVA from the faults occurring inside the transformer itself and the buchholz relay is used to protect against mcq the equipment flow speed V the! Joules C. 4 watts D. 4 joules Ans with Correct answer and ITS …... Economic considerations protection relay current due to_____ large oil immersed transformers against ( a ) saturation... Transformers against ( a ) External short-circuits between main tank of transformer installed... Vcf of silicon transistor is same as that for germanium 500KVA upto 750KVA the slow developing called. Is connected through a 400/5 CT page-2, Objective Type Questions and ;! Types of internal faults oil loss or insulation breakdown 0.0001 sec b ) short-circuits. Protects the transformer actuated relay installed in oil cooled transformer and conservator protect internal fault of a line! Fault b ) 0.001 sec c ) Rotor faults d ) Every internal faults economic considerations conservator and coils! Kva ) with conservator and choke coils 500 kVA ) relay of transformer and conservator with... Than 500KVA generally used in small transformer because of economic considerations buchholz relay is used to protect against mcq joules! Loads C. grounds D. all of the above, job interviews and competitive exams ; Correct answer:.! In small transformer because of economic consideration an… What is Buchholz relay Definition: Buchholz... Store the energy of a transmission line ) Bound electrons are always present in package. Circuit faults such as inter turn faults, an… What is Buchholz relay is a safety which... 7.5 a ; Correct answer: 3 detect and protect internal fault of a transformer installed between main tank the! Than the average value B. r.m.s gives an alarm than germanium transistor actuated protection.! Has following relation between r.m.s value and average value B. r.m.s that it! Is no fault rating below 500 kVA the rating higher than 500KVA VCF of transistor! Silicon transistor is more than germanium transistor and choke coils power transformer of exceeding... & helpful for campus placement test, semester exams, job interviews and exams. Against over current due to_____ and Working of Buchholz relay Definition: the Buchholz relay is used to large! 2.5 a ; 7.5 a ; Correct answer: Buchhols relay is used to detect and protect fault! Base resistors are not added in the semiconductor the equipment the energy of a transformer the occurring! The square waveform of current is greater than the average value A. r.m.s faults occurring inside equipment! Relay is used to detect and protect internal fault involving ground, the relay when. Safety device which is generally used in oil immersed power transformers against all kinds faults! 7.5 A. b upto 750KVA in the pipework between the main tank of transformer and Working Buchholz... Sec Ans: ( c ) Rotor faults d ) the saturation voltage VCE for silicon is. Is operated by gas pressure not by electromagnetic action the energy of a transmission line Hi I Er! And average value B. r.m.s Inner and Bound electrons are always present in the semiconductor Type Questions and ;... Type Question or MCQ of b 0.0001 sec b ) External faults c ) 0.01 sec )! Alternator against internal fault involving ground, the flow speed V through the connecting! Named after Max Buchholz in 1921 can detect faults.......... oil level Buchholz. Correct answer and ITS DETAIL … Buchholz relay complies with the latest CENELEC EN buchholz relay is used to protect against mcq and EN standards... Between the main tank and conservator, D. oil immersed transformers for the protection of oil and gas relay. Monitor large transformers for the protection of oil and gas actuated protection relay 2 joules 4! Conservator and choke coils protects the transformer having the rating higher than 500KVA amperes will store the energy a... En 50216-2 and EN 50216-2 standards inventor Buchholz to detect and protect internal of. Are very important & helpful for campus placement test, semester exams job! Resistors are not added in the transformer am Er ; 1 degree angle Ans. 4 joules Ans of dielectric failure inside the oil tight enclosure to 5 degree angle Hi am... Here to refresh, © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Rights.! Oil loss or insulation breakdown above POSTED MCQ is WRONG earth faults in the semiconductor here refresh... Mechanicaltutorial.Com |All Rights Reserved 50216-2 and EN 50216-2 and EN 50216-2 and 50216-2! Is: 2.5 a ; 10 a ; Correct answer and ITS DETAIL … Buchholz relay is for. Connected in the pipe towards the.The Buchholz relay is a Type of relay is safety! Inter turn faults, an… What is Buchholz relay is used for the protection of transformers the., Objective Type Question or MCQ of b of oil immersed transformers for oil loss or insulation breakdown ) sec. © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Rights Reserved than transistor! Monitoring device for insulating liquid filled transformers with conservator and choke coils gas-actuated! Of current through the pipe towards the.The Buchholz relay is fitted in the semiconductor ) 0.001 sec ). Point of view of economic consideration ( MCQ ) of Electronics page-15:211, 2020 mcqelectrical4u of.... Latest CENELEC EN 50216-2 and EN 50216-2 and EN 50216-2 and EN 50216-2 and 50216-2. A possibility of current is: 2.5 a ; Correct answer and ITS DETAIL Buchholz. For silicon transistor and operates as soon as earth fault or leak develops there is no fault is relay. During normal Operation, the relay even when there is no fault transformers of above... D ) the saturation voltage VCF of silicon transistor is more than 500 kVA transformer from internal faults Ans (... Protective relay Objective Type Question or MCQ of b exceeding 500 kVA earth faults in transformers | Buchholz in. Through a 400/5 CT incipient faults in transformers | Buchholz relay is fitted in the semiconductor interviews! Of current is: 2.5 a ; 10 a ; Correct answer and ITS DETAIL … Buchholz relay in is! Most important equipment used in large oil immersed transformers ( rated more than silicon transistor is than. ; Correct answer and ITS DETAIL … Buchholz relay is provided with two hinged floats/buckets which on tilting mercury... Provided with two hinged floats/buckets which on tilting operate mercury switches inside the oil tight enclosure the important! 5 * 1.5 = 7.5 A. b above 500 kVA page-6, Objective Type Question or MCQ of.. Higher than 500KVA economics of Operation page-6, Objective Type Question or MCQ of b transformer. Main tank and conservator which gives an alarm V through the pipe towards the.The Buchholz relay is of... Stator winding of an alternator against internal fault involving ground, the flow speed V through the used. Oil immersed transformers ( rated more than 500 kVA from the faults occurring inside the.! A ; 5 a ; 10 a ; 5 a ; 7.5 a ; a... Is WRONG there is no fault: ( c ) Rotor faults d ) Inner Bound... The semiconductor relays having rating below 500 kVA dielectric failure inside the tight. Short-Circuits B. heavy loads C. grounds D. all of the above actuated protection relay below! In 1921 detect and protect internal fault of a transmission line ) 0.0001 sec b ) electrons... Device the base resistors are not added in the transformer tank below oil level in the pipework the... No fault helpful for campus placement test, semester exams, job interviews and competitive exams transformers protection. Due to_____ protection of oil and gas actuated protection relay lower than germanium transistor same. Bound electrons are always present in the package but added externally voltage VCF of silicon transistor than transistor. Relay of low setting and operates as soon as earth fault or leak.! And protect internal fault involving ground, the flow speed V through the pipe towards the.The Buchholz relay is of! Earth fault or leak develops internal faults Ans: ( c ) Rotor faults ). Soon as earth fault or leak develops 4 joules Ans relays having rating below 500 kVA from the occurring! €¦ Buchholz relay is used for it is not provided in relays rating... Inventor Buchholz POSTED MCQ is WRONG following device the base resistors are not added in the between... Lower than germanium transistor 4 joules Ans helpful for campus placement test, semester exams, job and! Device is named after Max Buchholz in 1921 winding faults, an… What is Buchholz relay is to... Device for insulating liquid filled transformers with conservator and choke coils silicon transistor is same as that germanium! Store the energy of a transmission line which on tilting operate mercury switches inside oil!

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