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What is the difference between High Impedance and low Impedance Bus Bar Protection?

Protection Engineering Electrical
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Question added by ahmed saad eldin elkasass , استشارى مشروعات للحماية الكهربية , المجموعة الهندسية السعودية العالمية
Date Posted: 2015/11/10
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Ramprakash Ravichandran
by Ramprakash Ravichandran , Project Engineer , POWERBAR GULF LLC

  •     The operating current of the low-impedance  protection is not realized by CT connection. The relay measures all four current transformer(CT) necessary to realize the element..
  • The operating current of the High-impedance  protection is realized by CT connection.

 

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