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What does LSIG signify on Micrologic trip units?

Article available in these languages: Hungarian

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

Product Line:
Circuit Breakers

Resolution:
The letters LSIG signify the type of protection and available adjustments on certain trip units.
  • L = Long Time (overload protection, analogous 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, analogous 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

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