Cummins/Onan PCC 3100 — Current Transformer (CT) Installation
Installation · Current transformers CT21, CT22, CT23
For the Cummins/Onan PCC 3100, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCC, Cummins/Onan DGDA, Cummins/Onan DGDB, Cummins/Onan DGDK, Cummins/Onan DGEA, Cummins/Onan DGFA, Cummins/Onan DGFC, Cummins/Onan PCC 3100
Procedure
- The dot on the CT must face toward the generator (conventional current flowing into the dot).
- CT21 - U load leads (A phase); CT22 - V load leads (B phase); CT23 - W load leads (C phase).
- Route the appropriate leads through each CT.
- 6 lead generator sets - generator output leads are routed through the CTs.
- 12 lead generator sets - load wires are routed through the CTs.
- Connect CT secondary wire marked 1 to pin 1; wire marked 2/3 to pin 2 for high voltage or pin 3 for low voltage gensets.
- The lead from CT terminal #1 connects to the metering circuitry; the lead from terminal #2/3 connects to ground.
Specs & values
- Improper installation of CTs will cause a 335 Reverse Power shutdown error (non-parallel units only).
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGCC →, Cummins/Onan DGDA →, Cummins/Onan DGDB →, Cummins/Onan DGEA →, Cummins/Onan DGFA →, Cummins/Onan DGFC →, Cummins/Onan PCC 3100 →
Source: Cummins/Onan service 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.