Amr Muhammad AbdElaleem Elhadidy <br/><br/>
Design and implementation of a programmable simulator for the estimation of over - current protective relays immunity against decaying DC offests /  
 تصميم وتنفيذ محاكى قابل للبرمجة لتحديد اداء اجهزة الوقاية تحت تأثير مركبة التيار المستمر المتلاشية 
Amr Muhammad AbdElaleem Elhadidy ; Supervised Ahmed Alaa Mahfouz 
 - Cairo :   Amr Muhammad AbdElaleem Elhadidy ,   2007 
 - 88P. :   charts ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Electrical Power and Machines 
<br/><br/> Due to the inductive nature of power systems a decaying DC component appears in the fault current waveform , while the settings of the relay is based on pure steady state calculations.This decaying DC component might affect the operation of the protective relays and make theprotection system loose its security due to mal - trips 
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<br/><br/><label>Subjects--Index Terms: </label>Decaying DC offests Mal - Operation area Relay testers Simulators