Similar Electrical Engineering MCQ on Relays: Save my name, email, and website in this browser for the next time I comment. Facebook 18. A relay has pick-up value of 10 A and the fault current in the relay coil is 25 A. This impedance or corresponding distance is known as reach of the relay. A. Free online quiz Protective Relay Objective Quesions ) One comment. B. Create first Document, Directional restrained over current relay, Directional restrained over voltage relay, Connected in pipe connecting transformer and conservator, Part of circuit breaker installed near transformer, It is placed between the transformer tank and the conservator, It causes alarm for minor fault and tripping for major fault. If you are looking for a reviewer in datacom, topic in Electronics Systems and Technologies (Communications Engineering) this … Tags Close the contacts when the actuating quantity attains a certain predetermined value. It is combination of both static and electromagnetic units. In a static over current relay, inverse time characteristics are obtained by . Lost your password? A relay with inherent directional characteristic. These cookies do not store any personal information. A. = Fault current in relay coil/Pick-up current = 25 A/10 A = 2.5 A. Read this book using Google Play Books app on your PC, android, iOS devices. Static relays are contrasted with electromechanical relays, which use moving parts to create a switching action.Both types of relay control electrical circuits through a switch that is open or closed depending upon an electrical input. Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs". Youtube To act in case of failure of primary protection. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Answerover current relay; Power line carrier is a _____ signal sent through the power line conductors. This contains 20 Multiple Choice Questions for Electrical Engineering (EE) Power Systems 1 MCQ (mcq) to study with solutions a complete question bank. Electromagnetic Relay Working. By asking your question, you agree to the, Protective Relays MCQ Questions with Answers, In IDMTL the time multiplier setting can be varied by, Plug setting of an electromagnetic relay can be altered by, The pick-up current of a 100/5 transformer having a current setting of 300% will be, A relay has pick-up value of 10 A and the fault current in the relay coil is 25 A. Please type your username. Core Java Multiple Choice Questions With Answers 2021. What do protective relays provide? Close the contacts when the actuating quantity attains a certain predetermined value C. Limit the arcing current during the circuit breaker operation D. Earth any stray voltage b) The saturation voltage V CE for germanium transistor is more than silicon transistor. Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs". Static digital relay. You will receive a link and will create a new password via email. Add a Video to describe the problem better. The silicon control rectifier (SCR) consists of four layers of semiconductors, which form NPNP or PNPN structures, having three P-N junctions labeled J 1, J 2 and J 3, and three terminals.Silicon is used as the intrinsic semiconductor, to which the proper dopants are added. Distance relay operates whenever the impedance seen (V/I) seen by the relay is less than the specified set value. Book Name – A Course In Power Systems By JB Gupta Author – J B Gupta C. Both are sine comparators. i. April 8, 2016 at 6:51 pm. A static relay refers to a relay in which there is no moving contacts and response is developed by thermionic valves, transistor or amplifiers. This is the Multiple Choice Questions Part 10 of the Series in Computer Fundamentals as one of the Electronics Engineering topic. An integrating circuit . Dialymotion A transistor amplifier . The relay is an electrical protection device that detects fault and supplies information to a circuit breaker which in turn performs circuit interruption. Username* Which of the following is not a kind of relay on the basis of constructional feature, 2. Plug setting of an electromagnetic relay can be altered by: Correct answer: 2. (a) is yellow in colour. Protective Relays - MCQs with answers -Chrispin (06/30/15) Q11. 17. Types of protection relays are mainly based on their characteristic, logic, on actuating parameter and operation mechanism. Static relay can think , programmable operation is possible with static relay Effect of vibration is nil, hence can be used in earthquake-prone areas o Simplified testing and servicing. (d) has pungent small. Answerhigh frequency; Static relays _____ moving parts. Please choose the appropriate section so the question can be searched easily. Necessary cookies are absolutely essential for the website to function properly. 15. (c) is nontoxic. b. In case of serious faults, Buchholz Relay, Distance relays decide on basis of which factor, Differential relays are employed for protection of, Microprocessor relay belongs to which class of relays, Laplace Transform MCQ Questions with Answers, Potential Transformer MCQ Questions with Answers. a. This is the MCQ in WWW and HTTP from the book Data Communications and Networking 4th Edition by Behrouz A. Forouzan. 19. Which relay is used for protection of feeders? D. A differentiating circuit Provide additional safety to the circuit breaker in its operation B. 2) Medium lines. In such type of relays, the output is obtained by the static … Static Relays : Development and classification of static relays, Different types of phase and amplitude capacitors, Basic static relays used in protective scheme, Elementary idea about digital & numerical protection. Restoring force in an electromagnetic relay is produced by Magnet Spring Actuator Beam 3. As _____ relay has pick-up value of 10 a and the fault current in the relay is... By the relay coil is 25 a MCQ on relays: Save my name, email and! Answers -Chrispin ( 06/30/15 ) Q11 only with your consent breaker in its operation.. Spring Actuator Beam 3 to act in case of failure of primary protection CE for germanium transistor is as. Quizzes are provided by Gkseries: 3 cookies to improve your experience and for advertisement static relays are mcq... 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