All about Electrical Engineering

All about electrical engineering, power system, protection relays, protection schemes

11 August 2024

Accuracy Limit Factor (ALF) of Current Transformer

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Accuracy Limit Factor (ALF) is the ratio of the rated accuracy limit primary current to the rated primary current. This factor is critical f...
29 December 2023

End Fault Protection in bus bar relays

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Bus bar protection is generally differential protection for which zone of protection is defined by location of CTs. However, location of iso...
27 July 2022

Over current and earth fault protection

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Over current protection and earth fault is simple protection. Being low cost protection it is widely used across all levels. For lower volta...
13 March 2022

Time synchronization

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Introduction:  After any disturbance in power system, analysis for cause of disturbance requires sequential events from relevant protection ...

Controlled switching

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Introduction: In AC system, magnitude of current and voltage signal are always varying in time domain. Whenever opening command is given to...
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