Cummins/Onan — Over-Under Frequency Relay Setting
Adjustments
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Loosen the knob locks before changing or setting knobs.
- Use the under-frequency knob on the left to set the lowest acceptable frequency.
- Use the over-frequency knob on the right to set the highest acceptable frequency.
- Retighten the knob locks.
Specs & values
- Relay adjustable from 55 to 65 hertz
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.