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  • Users: aliz
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  1. aliz

    Line Differential Pickup Setting - SEL 411L

    Thanks for your comments. I just see in the 311L manual, they mention 87L pickup value should be at least 20% of Load current and Charging current, and for 87L2 and 87LG they put half of the 87L pick up.
  2. aliz

    Line Differential Pickup Setting - SEL 411L

    Hi, I am wondering if any one has experience of line differential relay setting calculation. Its a 230kV three terminal line - two generating stations are feeding to utility. I want to calculate the 87L pickup value. What are the factors should I consider? Do I need to calculate IAR/IAL...

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