An OC relay having the Preset/Pickup value at 7.9 A is connected to a Current Transformer with nominal ratio =200:10 of CT, the Secondary impedance of CT is 0.092 ohm and Burden on CT is 0.9 ohm. The CT has the cross-sectional area of core to be 2.9x110-6 Cm². The current of excitation being 0.5 A and frequency of power system is 50 Hz. (Also the above CT will get saturate on the max flux density of 1.2 Tesla) (a) Solve for the E.M.F induced in the secondary of above CT. (b) Evaluate, whether the OC relay will operate or not? , when a fault current of 250 A flows in the primary line? (c) Solve the above scheme for finding the C.T saturation status (whether the CT operation is under the knee-point or beyond the knee-point of Saturation)

An OC relay having the Preset/Pickup value at 7.9 A is connected to a Current Transformer with nominal ratio =200:10 of CT, the Secondary impedance of CT is 0.092 ohm and Burden on CT is 0.9 ohm. The CT has the cross-sectional area of core to be 2.9x110-6 Cm². The current of excitation being 0.5 A and frequency of power system is 50 Hz. (Also the above CT will get saturate on the max flux density of 1.2 Tesla) (a) Solve for the E.M.F induced in the secondary of above CT. (b) Evaluate, whether the OC relay will operate or not? , when a fault current of 250 A flows in the primary line? (c) Solve the above scheme for finding the C.T saturation status (whether the CT operation is under the knee-point or beyond the knee-point of Saturation)

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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