Cummins/Onan — Trip Unit Switch Adjustment
Operation · Micrologic electronic trip unit
From a Cummins/Onan manual covering: 1750DQKAA, PCC3300, QSK60. Check it applies to your exact model before use.
Applies to: Cummins/Onan 1750DQKAA, Cummins/Onan DQCA, Cummins/Onan DQGAA, Cummins/Onan DQKAA, Cummins/Onan DQKAB, Cummins/Onan DQPAA, Cummins/Onan QSK60, Cummins/Onan QSK60-G6 NR2 engine, Cummins/Onan QSK60 engine
Before you start
- Wait a minimum of 15 minutes after circuit breaker trips before resetting to allow thermal imaging to reset completely to zero.
Procedure
- Open switch cover.
- Adjust the appropriate switches to desired values.
- Replace switch cover.
- Use wire seal MICROTUSEAL, if necessary, to provide tamper evidence.
Tools required
- Wire seal MICROTUSEAL Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Trip units shipped with long-time pickup at 1.0 and all other adjustments at lowest settings
- In = 2000 A rating example: Ir = 0.7 x In = 1400 A
- Micrologic 3.0 example: Ii = 3 x In = 6000 A; tr = 1 s (at 6 x Ir)
Full service-parts list: Cummins/Onan DQCA →, Cummins/Onan DQGAA →, Cummins/Onan DQKAA →, Cummins/Onan DQKAB →, Cummins/Onan QSK60 →
Source: Cummins/Onan manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.