amswer all subparts For the system shown below (bus protection by differential current relay)ii an external fault has occurred on feeder # 3, findthe operating coil current, IWould the relay operate or not?YesNoiii, If the feeder # no.3 supplies 7000 A current infeed to the bus and an internal fault occurs on thebus itself, find| the operating coil current, LWould the relay operate or not?4=Ab.YesNo1, R600010000AI, R6000100007000G:009G:009Op. CoilOp. Coil

(ii) For external fault, zero current will flow through the operating coil of the relay. From the…

For the system shown below (bus protection by differential current relay) ii an external fault has occurred on feeder # 3, find the operating coil current, L Would the relay operate or not? 4- Yes No iii. If the feeder # no.3 supplies 7000 A current infeed to the bus and an internal fault occurs on the bus itself, find the operating coil current, L Would the relay operate or not? Yes No .... ... . 1 1, 6000 10000 ... . I, R 6000 10000 7000 600:5 G:009 Op. Coil Op. Coil

For the system shown below (bus protection by differential current relay) ii an external fault has occurred on feeder # 3, find the operating coil current, L Would the relay operate or not? 4- Yes No iii. If the feeder # no.3 supplies 7000 A current infeed to the bus and an internal fault occurs on the bus itself, find the operating coil current, L Would the relay operate or not? Yes No .... ... . 1 1, 6000 10000 ... . I, R 6000 10000 7000 600:5 G:009 Op. Coil Op. Coil

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter4: Conductor Sizes And Types, Wiring Methods, Wire Connections, Voltage Drop, And Neutral Conductor Sizing For Services

Section: Chapter Questions

Problem 20R: Circle the correct answer to the following statements: a. Type SE service-entrance cable is for...

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