Cummins/Onan ATUC A 800 - 4X / 111 — Overvoltage Sensor Settings
Adjustments · Overvoltage voltage sensor
For the Cummins/Onan ATUC A 800 - 4X / 111, from the Cummins/Onan service manual.
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Procedure
- Turn the PICK-UP VOLTAGE knob to the desired pick-up voltage (voltage at which load is transferred from commercial power to the generator set); a setting of 113 percent of nominal is usually satisfact
- Turn the % DROP-OUT DIFFERENTIAL knob to the desired deviation below the pick-up voltage; a setting of 5 percent is often satisfactory.
- After settings are finished, move the operation selector switch on engine control to RMT.
- Close cabinet door.
Specs & values
- Example: 113 percent of 120 volts = 135 volts pick-up
- Example: 5 percent of 135 volts = approximately 7 volts; drop-out = 135 - 7 = 128 volts
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.