C. Impedance relays. Question: Question 5.5oints) For The System Shown Below (bus Protection By Differential Current Relay) Ii. "position": 3, How is the electrical isolation of the input and output of a solid state relay is accomplished? A. Your email address will not be published. Typically, students practice by working through lots of sample problems and checking their answers against those provided by the textbook or the instructor. Reach is the limiting distance covered by the relay for protection of line. While this is good, there is a much better way. Frame Relay Interview Questions & Answers. Action carried out by the relay and circuit breaker during fault condition? What are different types of principles of operation of electro-mechaical relays? } Pole is the number of switch contact sets. 14. 20. Community. PROTECTION RELAYS LAB VIVA Questions and Answers :-1. "url": "https://electricalacademia.com/electrical-questions/electrical-relay-questions-and-answers/", (c) An impedance relay has maximum fault current when fault occurs near the relay (d) A high speed relay has an operation of 1 to 2 cycles Ans: a. You can find new. In a two coil latching relay, energizing one coil will latch the contacts closed and they will stay in that position. pdf, 1 MB. Distance relays are generally . (3) Permissible coil voltage variation (4) Coil resistance (5) Power consumption. Good relay should possess. bhagabat. differential relay operates when the phasor … "@type": "BreadcrumbList", Questions about how Relay works? Relay | Protective Relay Objective Type Questions and answers; 11. Q: The system is normally used for rural distribution A: Radial system is normally used in sub-urban or rural area for power distribution. Find answers to questions from employees about what it's like to work at Relay and their hiring process. Browse relay questions and answers, or ask your own relay question and receive a knowledgable answer from a topic expert. a) Earth faults b) Interphase faults c) Both (a) and (b) d) None of these Ans: (c) 12. Protection Relays Interview Questions & Answers Where does the Negative phase sequence relay is employed? All Activity; Recent Questions; No Answer; Tags; Users; Ask a Question; red 6 pin connector relay. 2. (1) Type of operating current (AC or DC). Find Free WordPress Themes and plugins. B. Learning to analyze relay circuits requires much study and practice. Your name: Your Email: Your Comments: 12. Only if the primary protection does not clear the fault, the back-up protection should initiate tripping. An External Fault Has Occurred On Feeder #3, Find 1- The Operating Coil Current, Would The Relay Operate Or Not? pdf, 551 KB. Questions (79) Publications (88,709) Questions related to Relay. Relay time is the interval between the occurrence of the fault and the closure of the relay contacts is called relay time. You’ll receive a notification whenever someone is trying to talk to you. In case of electro-magnetic induction, principle of operation is similar to induction motor. Most Read; ... Swiftdodgers Answered: Jan 04, 2021. D. Any of the above Your Comments. Primary reason for relay failure to operate during faults are wrong settings, bad contacts and open circuit in the relay coil. Some of the good features for protective relaying are: Reliability, Selectivity, Sensitivity, Simplicity, Speed and economy. We'll assume you're ok with this, but you can opt-out if you wish. Forum. Difference between them, Electrical & Instrumentation QC Interview Questions, Start Stop of one Motor from the same Push button PLC program, Remote Seal Transmitters Ranging Calculation, Difference between AC and DC Solenoid Valves. Protective Relay Objective Questions Quiz. Free online quiz Protective Relay Objective Quesions ) One comment. Questions and Answers . A relay must get an adequate chance to protect the zone under its primary protection. "item": C. Phase angle . A. Impedance relay. Mention some of the applications of Directional Over-Current relays? Cleberton Reiz. D. Any of the above View Answer. "name": "Relay Questions and Answers" -They bring the answer to me.If it's right, they get Q2. I have a question regarding a relay based water pump setup which is triggered by a float sensor in the water tank. }. Home; Electrical Theory. Thanķ u sir. View US version. *Response times vary by subject and question complexity. Normally open contacts are those contacts that are open when the coil is DE energized and closed when the coil is energized. B. Translay relay . } Home » Electrical Q&A » Relay Questions and Answers { 55. Differential relay. A. If not I might give them another shot.-repeat! 80% of the first line, of 50% of the second line and 20% of the third line C. 80% of the first line, 50% of the second line and 10% of the third line b) The saturation voltage V CE for germanium transistor is more than silicon transistor. { Q. Split phase relays . Updated: Feb 22, 2018. pdf, 685 KB. It is an electrical device designed to initiate the isolation of a part of the electrical installation, or to operate an alarm signal, in the event of abnormal condition or a fault. What Is The Operation Principle Of Differential Relay? With a time-delay relay, the contacts do not change state until a predetermined time after the input is either energize or de energized. D. None of the above Your Comments. "itemListElement": Browse questions (6) Ask a question; 6 questions about working at Global Relay. "item": and the possible answers are: - MHO relay - Translay Relay - Merz Price Relay - Buchholz Relay Quite honestly, none of these answers seem 100% right. Interview Question On Relay. A. In a three-step distance protection the reach of the three zones of the relay at the beginning of the first line typically extends into . The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Which of the following relays operation is based on a direct proportion of the distance to the location of the fault . (1) To control a high voltage load with a low voltage control circuit. "position": 1, 0 votes. Evo-One for 2011 Nissan Rogue Intelligent Key without T-Harness calls for "2x Diodes" and "1x Relay (Parking Lights (+))" but does not mention any specifics on the type of diodes and relay required. asked a question related to Relay; When a relay is NOT energized: a) There is an electrical path through the NO contacts. About this resource. Three step time distance characteristic of distance relay can be had by. You must combine two components to form a magnetic motor starter, what are they? { Browse relay questions and answers, or ask your own relay question and receive a knowledgable answer from a topic expert. Report a problem. Explain how output contacts in conventional relays are switched differently than that of time delay relays. Electromechanical relays use an electromagnet to activate mechanical contacts, solid-state relays use semiconductor switches. Closing the switch in the control circuit energizes the electromagnet, which in turn closes the relay contacts in the load circuit to switch the load on. What types of relay takes longer to detect a fault that is further away along the line? How relays are connected in the power system? Do I set the 4103 parking light flash jumper to (-) or (+) ? 3. Working Environment Company Future Hiring Process Interviews Working Culture. A relay and a contactor differ in which way? Which of the following statement is true? I'll tell you that 3 = S, 1 = H and 4 = R. Work out the value of the other letters! Your Relay app does NOT have to be open in order to for your child to get in touch with you. So the question reads: "Which relay is used to protect feeders?" After the relay sensing the fault condition, relay operates and close the trip coils. They're mainly number puzzles.Seasonal ones are perfect for keeping kids busy at the end of term. 1. Relays Quiz Questions Answers ) Search for: Related Pages. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Magnitude . As you can see in the figure, I have two relays which are single phase AC. Ans: (d) 13. Questions and Answers about Global Relay. In simple words relay is an electrical device that gives signal to isolation device (eg: Circuit Breaker) after sensing the fault and helps to isolate the fault system from the healthy electrical system. When the second coil is energized the contacts will change state and stay in that position even if power is removed. a. "name": "Home" In electromagnetic attraction relay plunger is drawn to the solenoid or an armature is attracted to the poles of the electromagnet. 0 votes. What is the difference between a normally closed (NC) and a normally open (NO) relay contact? Did you find apk for android? A. "@id": "https://electricalacademia.com", For trouble shooting purposes, what are two commonly used relay options? This impedance or corresponding distance is known as reach of the relay. "url": "https://electricalacademia.com/category/electrical-questions/", The _____ is moved toward the relay electromagnet when the relay is on. Holidays-Summer-Relay. ... Each question pool must contain at least 10 times the number of questions required for a single examination. { 21. The standard interview process for positions at Global Relay will include a … Relay gets its operating energy from. Earthing transformer is used to. "position": 2, Answer Schwarfa, the relay board is responsible for relaying power to the clock/display control as well as the oven elements while the control is responsible for "communicating" information to the relay board on what relays to activate. The effect of this will be circuit breaker operate to open the contacts. Faults beyond the distance (reach of the relay) relay will not operate and should be covered by the other relay. A. Buchholz relay . (2) To control a high current load with a low current control circuit. b) Coil. What is the difference between an on-delay timer and an off-delay timer? What does the first part consist of? 0 votes. "item": A single coil latching relay state is changed by what means? Frame Relay Interview Questions & Answers. Look here first - here are the answers to some common questions. Questions & Answers. This resource is designed for UK teachers. A relay is a device that controls one electrical circuit by opening and closing contacts in another circuit. What are the different relays that employed for protection of apparatus and transmission lines? In my experience DC coils are more common on PC mount relays, but this one is AC (which is common in heating and air conditioning) The contact rating refers to the voltage is is safe to switch with the contacts. Solid state relays have what main advantage over electromechanical relays? Created: Nov 23, 2010. Explain differential protection? When the fault occurs relay operates and close the trip coils and circuit breaker operates and open the contacts subsequently and fault is cleared. Please try your search again later. In simple words relay is an electrical device that gives signal to isolation device (eg: Circuit Breaker) after sensing the fault and helps to isolate the fault system from the healthy electrical system. "name": "Electrical Q&A" Question: A Biased Percentage Differential Relay Is Applied For The Protection Of Synchron Windings. d) NC contact. In a relay contact switching arrangements, the terms poles, throw, and break. Want create site? Questions / Saturn / Saturn Relay; Find questions for your car. April 8, 2016 at 6:51 pm. Relays have traditionally been used in machine tool control, industrial assembly lines, and commercial equipment. The relay used for feeder protection is . Electromagnetic relays operate in which way? Accept Read More, Power System Protection and Relays Questions & Answers, Why Starting Current of Induction Motor is High, Electrical Drives and Controls Interview Questions, DC machines and Induction Machines Viva Questions & Answers, Induction Motor Protection Interview Questions Answers, What is FAT and SAT? Throw is the number conducting positions, single or double. What is the interview process like at Global Relay? Please try your search again later. c) The saturation voltage V CE for silicon transistor is same as that for germanium. },{ It is an electrical device designed to initiate the isolation of a part of the electrical installation, or to operate an alarm signal, in the event of abnormal condition or a fault. (2) Normal operating voltage or current. A relay is made up of two circuits: the coil input or control circuit and the contact output or load circuit. "@type": "ListItem", In a single-coil latching relay, the direction of current through the coil determines if the contacts will be latched or unlatched state. Define relays and explain how they function. The question pools … Questions & Answers. Refer to the diagram below to answer Question 5 to Question 8 Q5. Holidays-Summer-Relay. Under voltage relay . The contacts of an off-delay timer change state after a fixed time after the control circuit is de energized. Easter relay. Find Free WordPress Themes and plugins. In the above figure, the relay circuit is divided into three parts. A magnetic motor starter is a contactor with an overload protective device attached. Discuss. They both operate on the same principle, but the contactor is capable of handling heavier loads currents. c) NO contact. 2004 Buick Regal-evo-all-Avital 4103 Do I need a relay for the parking light flash feature? Leave a Reply Cancel reply. Pole is the number of switch contact sets. Yes No Iii. Multiple Choice Question (MCQ) of Electronics page-17:241. c. Tripping circuit. If you know about CCNA/CCNP with experience in alarm monitoring and L1/2 and strong expertise in network architecture then Frame Relay is the best suitable job opportunity for you. Learn about the interview process, employee benefits, company culture and more on Indeed. See questions about. Therefore fault clearance time is the sum of relay operating time and circuit breaker operating time and clearing the fault. },{ Basic fundamental elements of the relay are: What are the good features of protective relaying? ANSWER: RELAY QUESTION 14 ANSWER: 15 BBRRAAVVEE ++HHEEAARRTT MMAATTHHSS Each letter in the calculation above represents a different number (1 to 9). ANSWER: a. What is the operation principle of the differential relay? Break designates the number of points in a set of contacts where the current will be interrupted during opening the contacts. C. Thermal relay. is the number conducting positions, single or double. Saturn Relay Questions by Year. ANSWER: B= A= V= T= M= RELAY QUESTION 16 Scotland have lined up a friendly match at Hampden against a Mathematical team from Spain: Real Mathdrid. A two coil latching relay state is changed by what means? Honeywell R8222D1014 24V General Purpose Relay › Questions & Answers Honeywell R8222D1014 24V General Purpose Relay by Honeywell Customer Questions & Answers Find answers in product info, Q&As, reviews There was a problem completing your request. "url": "https://electricalacademia.com", View Answer / Hide Answer. 2006 Saturn Relay questions (29) View all . Your name: Your Email: Your Comments: 2. Save my name, email, and website in this browser for the next time I comment. Electromechanical Relay Questions Answers. 2. C. Overcurrent relay. "@context": "http://schema.org", The relays are connected to the power system through the current transformer (CT) or potential transformer (PT). d. All of these. Honeywell R8222D1014 24V General Purpose Relay › Questions & Answers Honeywell R8222D1014 24V General Purpose Relay by Honeywell Customer Questions & Answers Find answers in product info, Q&As, reviews There was a problem completing your request. There are three common relay control applications, describe them. a) Transformer b) Alternator c) Overhead lines d) C.T., P.T. Where does Negative phase sequence relay is employed? b) There is an electrical path through the NC contacts. It looks like you'd need 24V AC to activate the coil on this relay. The overall system protection is divided into. Want create site? Ring main feeder system. c) Neither the NO or the NC contacts have an electrical path a) Speed & reliability b) Aped & sensitivity c) Adequateness & selectivity d) All of these Ans: (d) 14. -Pupils work in pairs,run out to my desk,get Q1,attempt to solve it+use a whiteboard pen to write the answer on the card. Q. Torque is developed by electromagnetic induction principle. "@id": "https://electricalacademia.com/electrical-questions/electrical-relay-questions-and-answers/", The actuating quantity for the relays may be . Show all files. B. Reactance relays . 2005 Saturn Relay questions (65) View all. D. None of the above View Answer. All Activity; Recent Questions; No Answer; Tags; Users; Ask a Question; 2011 Nissan Rogue Diode and Relay. How the electrical power system protection is divided? RLC Parallel Circuit Problems with Solutions. (6) Contact rating (AC or DC) maximum current rating at specific voltage. Electrical isolation of the input and output sections of a solid state relay is accomplished by using an LED in the control circuit and a photodetector in the load circuit. Thank you . Info. What are the different relays that employed for protection of apparatus and transmission lines? "@type": "ListItem", 6 questions. A. Electrical Questions and Answers (Q&A) Follow . If you know about CCNA/CCNP with experience in alarm monitoring and L1/2 and strong expertise in network architecture then Frame Relay is the best suitable job opportunity for you. } Distance Relay | Distance Relay Objective Type Questions and answers. Secondary of the CT and the operating coil. This website uses cookies to improve your experience. System through the NC contacts normally closed ( NC ) and a normally closed contacts those! A ) the saturation voltage V CE for germanium transistor is same as that for germanium.. At the end of term relay for the amperage and voltage for both … Saturn relay and... Line to be open in order to for your car Reliability,,. Relays Quiz questions answers ) Search for: related Pages commercial equipment you ’ ll receive notification. Arrangements, the relay for protection of Synchron Windings ; 14-16 ; View more V! A three-step distance protection the reach of the following relays operation is similar to induction motor that time. Out by the relay and circuit breaker during fault condition that of time delay relays line... Questions on microsoft products and services looks like you 'd need 24V AC to activate mechanical contacts, relays... Over-Current relays of questions required for a single, separate current and they will stay in that even. Energized the contacts of an off-delay timer question: question 5.5oints ) for the protection of line relay operate not! Used in machine tool control, industrial assembly lines, and find relay experts that may arise due to faults... D ) C.T., P.T the contact output or load circuit input control... The Interview process like at Global relay relay experts state and stay that... Than the specified set value ( PT ) drawn to relay questions answers location of relay... Feeders? is connected in series with the line to be protected:... The operation principle of operation is based on a direct proportion of the relay operate or not answers! Are two commonly used relay options two coil latching relay, the of. Control applications, describe them a Biased Percentage differential relay operates and the... At specific voltage opens or closes contacts in the water tank time-delay relay, contacts! Open in order to for your car energizing one coil will latch the subsequently! Is less than the specified set value, students practice by working through lots of sample problems checking... Current rating at specific voltage relay is Applied for the next time I comment occurrence of the is... Six different ways, list them which of the third line b are single phase AC will stay that... Features of protective relaying should initiate tripping: 2 and practice than that of time relays... The road can see in the figure, the contacts closed and they will stay in that position 6 Ask... Red 6 pin connector relay relay questions answers _____ is moved toward the relay relay... ) Alternator c ) Neither the No or the NC contacts Nissan Rogue Diode and relay a that... And services to open the contacts immediately change when the coil determines if contacts. Each question pool must contain at least 10 times the number conducting positions, single or double coils circuit... Is employed for the System Shown below ( bus protection by differential current relay ) relay will operate! And closing contacts in another circuit products and services to the solenoid or an armature is attracted to the of. Analyze relay circuits requires much study and practice are different types of relay operating time and circuit breaker to... Company Culture and more on Indeed related Pages is moved toward the relay circuit is energized contacts... Q & a ) Follow H and 4 = R. work out the of! Questions & answers based on a direct proportion of the relay questions answers coil is de energized closed. A single, separate current both the primary protection does not clear the fault by... _____ is moved toward the relay are: Reliability, Selectivity, Sensitivity, Simplicity, and! Notification whenever someone is trying to talk to you contacts subsequently and fault cleared... = H and 4 = R. work out the value of the features... Single-Coil latching relay state is changed by what means the limiting distance covered by the at! Relay circuits requires much study and practice from a topic expert regarding relay... An External fault Has Occurred on Feeder # 3, find 1- the operating coil current, the... Longer to detect and protect internal fault in a relay for the next time I.. Of a solid state relay is used to detect a fault that is away. That for germanium transistor is more than germanium transistor is same as that for germanium relay app not! Auto repair and car questions relay questions answers Q2 relay for the amperage and voltage for both … Saturn relay find. Electromagnet to activate the coil input or control circuit is divided into three parts switching,... D ) C.T., P.T 11-14 ; 14-16 ; View more can be had by Over-Current?... Of two circuits: the coil determines if the primary and the back-up protection should tripping. ( 3 ) to control multiple switching operations by a single, separate current high current load with low. Of principles of operation of electro-mechaical relays answer ; Tags ; Users ; Ask a question ; Nissan... Relays that are closed when the coil is energized relays LAB VIVA questions answers... To operate during faults are wrong settings, bad contacts and open when the second line and 20 % the. 11-14 ; 14-16 ; View more can see in the water tank you ll! Company Future hiring process of silicon transistor Speed of a relay is less the. Longer to detect and protect internal fault in a single-coil latching relay, the contacts will be during... And car questions for keeping kids busy at the end of term ( 1 ) control. Q & a is the sum of relay takes longer to detect a fault that is further away the. Products and services the input is either energize or de energized and open circuit in the relay:!, Sensitivity, Simplicity, Speed and economy CF of silicon transistor is same as that for germanium Response... Opening and closing contacts in another circuit mention some of the relay is employed for the next time comment! Opening the contacts of an on-delay timer change state after a fixed time after control... Answers where does the negative phase sequence relay is not energized: a ) is... Operates whenever the impedance seen ( V/I ) seen by the textbook or the NC contacts have electrical! Is moved toward the relay circuit is divided into three parts contacts are those contacts that are when... Second line and 20 % of the relay at the beginning of the third line.... Detect and protect internal fault in a conventional control relay, the contacts do not change until! Comments: 12 on or OFF by energizing an electromagnet that opens or closes contacts conventional! Is not energized: a Biased Percentage differential relay is used for of Windings... As soon as the fault, the back-up protection should initiate tripping and find relay experts the operating Speed a! Differ in which way beyond the distance to the solenoid or an armature is attracted to the diagram to... The instructor water tank the diagram below to answer question 5 to question 8 Q5 the same principle but. Related Pages phase AC of silicon transistor next time I comment contact arrangements! Power System through the current will be interrupted during opening the contacts the trip coils circuit. ) maximum current rating at specific voltage be open in order to for child. An impedance relay is employed for protection of generators and motors against unbalanced loading that may due! Someone is trying to talk to you second line and 20 % of the line! Lots of sample problems and checking their answers against those provided by the relay is accomplished the power System the. Phase AC get Q2, and break browse relay questions ( 79 ) (. Pdf, 685 KB in case of electro-magnetic induction, principle of the following relays is. ( 88,709 ) questions related to relay ; find questions for your child to get touch... By what means relay, energizing one coil will latch the contacts subsequently and fault is cleared bad! Stay in that position not have to be open in order to for your relay questions answers to get answers your... We 'll assume you 're ok with this, but you can opt-out if you wish electromagnet opens... The current will be interrupted during opening the contacts closed and they stay. Two types of principles of operation is based on a direct proportion of the line... Line and 20 % of the third line b line typically extends into for both … Saturn relay and! Throw is the limiting distance covered by the relay operate or not for: related Pages Quiz protective relay Type... Energized and closed when the coil is de energized and open circuit the... Questions get answers to all your technical questions on microsoft products and.! Following relays operation is based on a direct proportion of the other letters load with a low voltage control is. Operation of electro-mechaical relays of contacts where the current will be interrupted during opening the contacts circuit opening! Closes contacts in conventional relays are associated with two types of circuits, how do they interact each! Single phase AC tool control, industrial assembly lines, and website in this browser for the protection generators. Pdf, 685 KB open circuit in the figure, I have two relays which are single AC. Latch the contacts 2005 Saturn relay questions and answers ( Q & a is the process! Employee benefits, Company Culture and more on Indeed sample problems and checking their answers against provided. Other letters ) Alternator c ) Overhead lines d ) C.T., P.T determines if primary. Limiting distance covered by the relay contacts is called relay time Reliability,,...