FA126342
28 September 2021
Issue:Can the ground fault pickup be disabled on a Micrologic 6.0A (Ammeter), 6.0P (Power) or 6.0H (Harmonic) trip unit?
Product Line:Micrologic, Masterpact, Powerpact
Environment:6.0 (A, P, H) trip units on Powerpact P- and R-frames, Masterpact NW- and NT-frames
Cause:Need to disable ground fault on a breaker with LSIG trip functions
Resolution: No. To eliminate ground fault protection, replace the trip unit with a 5.0 type.
For ground fault alarm, replace the trip unit with a 5.0P trip unit (S163A) and use a M2C (S64273) or M6C (S64204) programmable contact module. If replacing a standard trip unit (not A, P or H), the 12-pin connector for the trip unit (kit S33101 for Masterpact, S33100 for Powerpact) must also be ordered.
Note: if ground needs to be temporarily disabled for primary injection testing, refer to
FA98682. See instruction bulletins:
Powerpact P, R, and Masterpact NW, NT Micrologic™ 5.0P and 6.0P Trip Units, see
48049-137-05