Cummins/Onan — Current Transformer Installation Requirements
Installation · Current transformers
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFE, Cummins/Onan DFEJ, Cummins/Onan DFEK, Cummins/Onan QSX15 engine
Procedure
- CT has dot on one side; dot must face toward generator (conventional current into dot). Dot also indicates pin 1.
- CT21 – U load leads (A phase), CT22 – V load leads (B phase), CT23 – W load leads (C phase).
- Route appropriate load wires through each CT.
- CTs have dual secondaries. Wire 1 to pin 1; wire 2/3 to pin 2 for high voltage or pin 3 for low voltage.
Full service-parts list: Cummins/Onan DFE →, Cummins/Onan DFEJ →, Cummins/Onan DFEK →
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.