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Determining Max Zs For Time Current Curve

Former Community Member
Former Community Member
How do you determine the max Zs when the manufacturer does not list or specify the maximum permitted earth fault loop impedance? TN system.


https://library.industrialsolutions.abb.com/publibrary/checkout/GES-6119D?TNR=Time%20Current%20Curves%7CGES-6119D%7CPDF&filename=GES6119.pdf
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  • Former Community Member
    0 Former Community Member
    In this example, do I just take the maximum clearing time at face value for determining disconnection time?
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  • Former Community Member
    0 Former Community Member
    In this example, do I just take the maximum clearing time at face value for determining disconnection time?
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