a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Please try your search again later. If you access the control and test pin 14 and 15 at the connection coming from the relay board, you should have 24VAC coming from the relay board. An External Fault Has Occurred On Feeder #3, Find 1- The Operating Coil Current, Would The Relay Operate Or Not? 2006 Saturn Relay questions (29) View all . Refer to the diagram below to answer Question 5 to Question 8 Q5. Electro-magnetic attraction and electro-magnetic induction. I have a question regarding a relay based water pump setup which is triggered by a float sensor in the water tank. 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. A. Impedance relay. Differential relay. Define relays and explain how they function. Where does Negative phase sequence relay is employed? A magnetic motor starter is a contactor with an overload protective device attached. In a single-coil latching relay, the direction of current through the coil determines if the contacts will be latched or unlatched state. Frequency . Ask a mechanic for help and get back on the road. Browse questions (6) Ask a question; 6 questions about working at Global Relay. "position": 1, D. None of the above Your Comments. -They bring the answer to me.If it's right, they get Q2. After the relay sensing the fault condition, relay operates and close the trip coils. 0 votes. b) The saturation voltage V CE for germanium transistor is more than silicon transistor. 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. As you can see in the figure, I have two relays which are single phase AC. All Activity; Recent Questions; No Answer; Tags; Users; Ask a Question; Parking light flash relay. (3) Permissible coil voltage variation (4) Coil resistance (5) Power consumption. "@id": "https://electricalacademia.com/category/electrical-questions/", Break designates the number of points in a set of contacts where the current will be interrupted during opening the contacts. Relay | Protective Relay Objective Type Questions and answers; 1. C. Impedance relays. Pole is the number of switch contact sets. You must combine two components to form a magnetic motor starter, what are they? Which of the following relays operation is based on a direct proportion of the distance to the location of the fault . Therefore fault clearance time is the sum of relay operating time and circuit breaker operating time and clearing the fault. 0 votes. What are the fundamental elements of relay? A relay is a device that controls one electrical circuit by opening and closing contacts in another circuit. Some of the good features for protective relaying are: Reliability, Selectivity, Sensitivity, Simplicity, Speed and economy. Define relays and explain how they function. Q. "name": "Relay Questions and Answers" Basic fundamental elements of the relay are: What are the good features of protective relaying? C. Differential relay. Holidays-Summer-Relay. Ans: (d) 13. Magnitude . When the second coil is energized the contacts will change state and stay in that position even if power is removed. b) There is an electrical path through the NC contacts. "itemListElement": An impedance relay is used for. Relays are associated with two types of circuits, how do they interact with each other? This resource is designed for UK teachers. What are the different relays that employed for protection of apparatus and transmission lines? { Thanķ u sir. A. "url": "https://electricalacademia.com", Please try your search again later. Pole is the number of switch contact sets. What Is The Operation Principle Of Differential Relay? The question pools … What types of relay takes longer to detect a fault that is further away along the line? "item": [ Primary reason for relay failure to operate during faults are wrong settings, bad contacts and open circuit in the relay coil. Categories & Ages. ARRL. 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. Relays Quiz Questions Answers ) Search for: Related Pages. "@id": "https://electricalacademia.com", This impedance or corresponding distance is known as reach of the relay. Interview Question On Relay. Faults beyond the distance (reach of the relay) relay will not operate and should be covered by the other relay. In a conventional control relay, the contacts immediately change when the control circuit is energized. 21. 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. Questions & Answers; Parking light flash relay. In case of electro-magnetic induction, principle of operation is similar to induction motor. Split phase relays . Find 61 questions and answers about working at CSD RELAY. Relay time is the interval between the occurrence of the fault and the closure of the relay contacts is called relay time. a) Armature. b) Coil. Q: The system is normally used for rural distribution A: Radial system is normally used in sub-urban or rural area for power distribution. Leave a Reply Cancel reply. Normally closed contacts are those contacts that are closed when the coil is de energized and open when the coil is energized. With a time-delay relay, the contacts do not change state until a predetermined time after the input is either energize or de energized. You’ll receive a notification whenever someone is trying to talk to you. Which of the following statement is true? When a relay is NOT energized: a) There is an electrical path through the NO contacts. 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. Primary winding of a current CT which is connected in series with the line to be protected. B. Translay relay . Protection Relays Interview Questions & Answers Where does the Negative phase sequence relay is employed? 2005 Saturn Relay questions (65) View all. If not I might give them another shot.-repeat! and the possible answers are: - MHO relay - Translay Relay - Merz Price Relay - Buchholz Relay Quite honestly, none of these answers seem 100% right. "@type": "ListItem", Free online quiz Protective Relay Objective Quesions ) One comment. A. Home; Electrical Theory. pdf, 551 KB. Valentine-Relay. B. Definite time relay. A. 100% of the first line, 50% of the second line and 20% of the third line B. Earthing transformer is used to. D. None of the above View Answer. Most Read; ... Swiftdodgers Answered: Jan 04, 2021. Frame Relay Interview Questions & Answers. (6) Contact rating (AC or DC) maximum current rating at specific voltage. We'll assume you're ok with this, but you can opt-out if you wish. c. Tripping circuit. c) NO contact. Questions about how Relay works? The actuating quantity for the relays may be . 14. Looking for a particular question? c) The saturation voltage V CE for silicon transistor is same as that for germanium. Saturn Relay Questions Get answers to your auto repair and car questions. In electromagnetic attraction relay plunger is drawn to the solenoid or an armature is attracted to the poles of the electromagnet. 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. Solid state relays have what main advantage over electromechanical relays? "@type": "ListItem", A. Discuss. What is the difference between a normally closed (NC) and a normally open (NO) relay contact? d. All of these. C. Phase angle . },{ A. Buchholz relay . 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 55. } a. Home » Electrical Q&A » Relay Questions and Answers { ANSWER: RELAY QUESTION 14 ANSWER: 15 BBRRAAVVEE ++HHEEAARRTT MMAATTHHSS Each letter in the calculation above represents a different number (1 to 9). Electrical Questions and Answers (Q&A) Follow . All Activity; Recent Questions; No Answer; Tags; Users; Ask a Question; red 6 pin connector relay. Question: Question 5.5oints) For The System Shown Below (bus Protection By Differential Current Relay) Ii. Electromechanical Relay Questions Answers. Community. "position": 3, Explain how output contacts in conventional relays are switched differently than that of time delay relays. Working Environment Company Future Hiring Process Interviews Working Culture. B. Reactance relays . a) Transformer b) Alternator c) Overhead lines d) C.T., P.T. In a two coil latching relay, energizing one coil will latch the contacts closed and they will stay in that position. "name": "Home" Relay | Protective Relay Objective Type Questions and answers; 11. View US version. -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. C. Overcurrent relay. The _____ is moved toward the relay electromagnet when the relay is on. Browse relay questions and answers, or ask your own relay question and receive a knowledgable answer from a topic expert. A. 0 votes. Multiple Choice Question (MCQ) of Electronics page-17:241. The contacts of an off-delay timer change state after a fixed time after the control circuit is de energized. Browse relay questions and answers, or ask your own relay question and receive a knowledgable answer from a topic expert. Want create site? 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. So the question reads: "Which relay is used to protect feeders?" For germanium transistor is same as that for germanium transistor sample problems checking... To ( - ) or ( + ) depends upon the Explore the latest questions and in. Operate during faults are wrong settings, bad contacts and open the contacts Saturn relay questions answers!: 12 ; find questions for your car two coil latching relay state is changed what. Conducting positions, single or double is 34 minutes and may be longer for new subjects will! Help and get back on the road, describe them your name: your Email your... Switching operations by a float sensor in the circuit the limiting distance covered the!: 2 are switched differently than that of time delay relays clear the occurs. A contactor with an overload protective device attached voltage V CE for silicon transistor transformer... Use semiconductor switches does not clear the fault occurs relay operates and the... Has Occurred on Feeder # 3, find 1- the operating Speed of a relay is used to protect?... Apparatus and transmission lines include Would the relay contacts is called relay.! Need a relay and a contactor differ in which way principle of operation of electro-mechaical relays online protective! Diagram below to answer question 5 to question 8 Q5 much study and practice usually employed for of. Current ( AC or DC ) maximum current rating at specific voltage | protective relay Objective Type and! Principle, but you can opt-out if you wish, principle of operation of electro-mechaical relays learning to relay! Saturn / Saturn relay ; Frame relay Interview questions & answers ( 65 ) all. Delay relays I comment set value saturation voltage V CE for silicon transistor their hiring process Interviews Culture. -They bring the answer to me.If it 's right, they get Q2 normally open contacts are those that. _____ is moved toward the relay S, 1 = H and 4 = R. work out the of... High current load with a time-delay relay, the direction of current through the NC contacts answers where the... Activate mechanical contacts, solid-state relays use an electromagnet to activate the coil is energized arise due phase... Or closes contacts in conventional relays are associated with two types of circuits, do. Breaker operating time and circuit breaker operating time and clearing the fault place... 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