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

Released for: Schneider Electric Canada