The load current in a system is 100 A. the short-circuit current for the smallest fault is 100 A. An overcurrent capable of carrying a current of 5 A continuously is to be used. (a) Suggest a suitable C.T. ratio (b) What will be the current for the smallest fault? (c) Will the protective C.T be able to faithfully reproduce the fault current?
The load current in a system is 100 A. the short-circuit current for the smallest fault is 100 A. An overcurrent capable of carrying a current of 5 A continuously is to be used. (a) Suggest a suitable C.T. ratio (b) What will be the current for the smallest fault? (c) Will the protective C.T be able to faithfully reproduce the fault current?
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
Chapter7: Symmetrical Faults
Section: Chapter Questions
Problem 7.1P
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Question
The load current in a system is 100 A. the short-circuit current for the smallest fault is
100 A. An overcurrent capable of carrying a current of 5 A continuously is to be used.
(a) Suggest a suitable C.T. ratio
(b) What will be the current for the smallest fault?
(c) Will the protective C.T be able to faithfully reproduce the fault current?
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