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Primary Current Injection instantenous Pickup

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    Primary Current Injection instantenous Pickup

    Hi guys,
    I need a help. In NETA ATS there is a sentence like "Determine instantaneous pickup by primary current injection."
    In my project some of the MCCB's are have 30000A. How can i perform this test? Also i need a current transformer to increase currents. Is it possible to find like 30000/5 A current transformer?

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    Quote Originally Posted by changeabilities View Post
    Hi guys,
    I need a help. In NETA ATS there is a sentence like "Determine instantaneous pickup by primary current injection."
    In my project some of the MCCB's are have 30000A. How can i perform this test? Also i need a current transformer to increase currents. Is it possible to find like 30000/5 A current transformer?
    You can test at a lower setting if the trip unit and job spec allows. For example a 4000A breaker dialed down to 2x will trip at 8000A opposed to 40000A at 10x.

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