Please solve these two questions Consider the plunger-type relay shown below. The pickup current is 5A and the drop out current is 3.57A. The pole face has a height of 1.5cm, while the spring holds the plunger 1 cm out of the coil when the current is below the pickup value. The air gap 'g' is 0.2 cm, and 'gd/4a'= 0.05. Let the spring force Fs be a constant, with a value of 0.001 N, and let the mass of the plunger be 0.005 kg. Let the travel of theplunger be 3 mm before it hits a stop and closes its contacts. If I-2, then the operating time would be equal to:FSelect one:a.None of theseO b. 1.25s○ c. 0.75sO d. 0.25st =100(x-x1)1.48 In-1 Consider the system below where a fault F has taken place between breakers B1 and B2. If R1, B1, R5, B5, R6 and B6 operate, then the systemresponse would be characterized by the following:Rs BR3 B3R₁ B₁R2 B2R4 B4R6 BeSelect one:O a. Response incorrect and inappropriateb. All of these○ c.R2 failed to operate: Incorrect and loss of securityO d. R5, R6 initiate B5, B6 as remote back up protectionClear my choice

Answered: Image /qna-images/answer/41dfed15-1ff8-459b-a648-da69f91babb8.jpg

Answered: Consider the plunger-type relay shown…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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