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    What does LSIG signify on Micrologic trip units?

    Issue:
    What are the LSIG trip unit functions on a Micrologic trip unit?

    Product Line:
    Circuit Breakers

    Environment:
    Applies to circuit breakers with Micrologic Trip Units

    Resolution:
    The letters LSIG signify the type of protection and available adjustments on certain trip units.
    • L = Long Time (overload protection, analygous to the inverse-time thermal trip of a thermal/magnetic breaker)
    • S = Short Time (short circuit protection of low level faults)
    • I = Instantaneous (short current protection of high level faults, analagous to the instantaneous magnetic trip of a thermal/magnetic breaker)
    • G = Ground Fault (equipment ground fault protection)
    Therefore, LSIG = Long-time + Short-time + Instantaneous + Equipment Ground-fault Protection

    Available on the UL Listed, ANSI Certified, and IEC Rated 3.0 3.3,5.0, 5.0A, 5.0P, 5.0H, 5,3,6.0A,6.0P,6.0H, 6.3 trip units

     

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