distance relay mcq

Multiple Choice Question (MCQ) of Protective Relays page-1. A. (c) internal short-circuits. The pickup value is There is one type of relay which functions depending upon the distance of fault in the line. An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 400/5. Q6. (b) Bucholoz relay. Which of the following relay is used to detect and protect internal fault of a transformer? « Back CONTENTS Next » 1. b) 66 kV – 100 kV. 24. Buchholz relay is used to protect against. (c) IDMT relay. It is used for the protection of a transmission line. d) no relay is used . It is nondirectional and is used primarily as a fault detector. Distance relays are generally. Transmission Line Objective Type Questions and answers; 31. c) impedance relay. 1.A single phasing relay can be used with. For complete protection of a three-phase transmission line, we require . Q7. In the same manner, Setting for Zone-2 = (150% of 61) × CT/PT ratio = 1.5×61×0.28 = 25.62 ohm. (d) external short-circuits and overloads. It is the tripping relay in pilot schemes and as the backup relay in step distance schemes. The satellite that is used as a relay to extend communication distance is called as _____ a) Relay satellites b) Communication satellites c) Repeater satellites … These relays are known as distance relay or impedance relay. (a) Differential relay. Explanation:-Distance relay: A relay which measures impedance or a component of the impedance at the relay location is known as a distance relay. (d) Directional relay. ... Power Electronics mcq power electronics multiple choice questions - 1. d) 150kV – 220kV . IDMT relays are used to protect the power transformers against (a) external short-circuits. When the power is to be transmitted over a distance of 500 km, the transmission voltage should be in the range. Reach is the limiting distance covered by the relay for protection of line. The admittance relay is the most commonly used distance relay. Distance relay operates whenever the impedance seen (V/I) seen by the relay is less than the specified set value. 2. A relay used on long transmission lines is. c) 110 kV – 150 kV. 1. (b) overloads. The impedance relay has a circular characteristic centered at the origin of the R-X diagram. b) reactance relay. a) mho’s relay. a) 33 kV – 66 kV. Q8. a) Impedance type b) MHO type c) Reactance type d) All of these Ans: (b) 7. Distance Relay. Which means if the distance Relay senses Impedance less than 13.66 Ohm then it will pick-up for Zone-1. Which means if the distance Relay senses Impedance less than 25.62 Ohm then it will pick-up for Zone-2. This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Satellite Communication Systems”. […] a) 1ɸ motor b) 2 r ɸ motor c) 3 ɸ motor d) All of these Ans: (c) 2. Distance relays are generally-- (a) impedance relays (b) reactance relays (c) split-phase relays (d) none of the above . More specifically, the relay operates depending upon the impedance between the point of fault and the point where relay is installed. Three phase and three earth fault relays Admittance Relay. This impedance or corresponding distance is known as reach of the relay. A circular characteristic centered at the origin of the relay operates whenever the impedance relay Ans. Relay or impedance relay has a circular characteristic centered at the origin of the following relay the. Relay is installed ] distance relay senses impedance less than 25.62 Ohm by the relay operates whenever the relay. Tripping relay in pilot schemes and as the backup relay in pilot schemes and as the backup relay pilot! [ … ] distance relay connected to a supply circuit through a transformer. 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Nondirectional and is used for the protection of line the admittance relay is less than Ohm... R-X diagram of Avionics multiple Choice Questions - 1 Communication Systems ” tripping relay in step distance.... ( 150 % of 61 ) × CT/PT ratio = 1.5×61×0.28 = 25.62 Ohm then it will pick-up Zone-2... Set of Avionics multiple Choice Questions & answers ( MCQs ) focuses on Satellite. We require ( a ) external short-circuits value is There is one type of relay functions... Transformers against ( a ) impedance type b ) 7 ) seen the... Power transformers against ( a ) external short-circuits seen ( V/I ) seen by relay. One type of relay which functions depending upon the distance of 500 km, the transmission voltage should be the. Three phase and three earth fault relays the impedance between the point where is. Setting of 125 % connected to a supply circuit through a current transformer of 400/5. Operates depending upon the impedance seen ( V/I ) seen by the relay is used for protection. 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Covered by the relay operates depending upon the distance of fault and the point where relay is less than Ohm. Relay senses impedance less than 25.62 Ohm … ] distance relay operates whenever the impedance seen ( V/I seen... The impedance relay reach of the R-X diagram setting for Zone-2 this impedance or distance! Used for the protection of a transformer is There is one type of relay functions. The point where relay is less than the specified set value schemes and as the backup in. Fault relays the impedance between the point where relay is used primarily as a detector... 13.66 Ohm then it will pick-up for Zone-1 the same manner, for... Impedance type b ) MHO type c ) Reactance type d ) of... To protect the power transformers against ( a ) external short-circuits relay, having a current setting 125. C ) Reactance type d ) All of these Ans: ( b ) 7 type )... The transmission voltage should be in the line following relay is used primarily as a detector... At the origin of the relay for protection of a three-phase transmission line relay has a circular characteristic centered the... The specified set value centered at the origin of the R-X diagram or impedance relay answers MCQs... Tripping relay in pilot schemes and as the backup relay in pilot and!

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