14V Alternator Controller Unit (ACU), Voltage Regulator with Built-In OV Sensor
- Installation Drawing
- Warranty Card
- Product Eligibility Catalog (PEC)
- Troubleshooting Notes
- STC Certificate
- Instructions For Continued Airworthiness Maintenance (ICA)
Voltage Regulation, Remote Voltage Sense
“The Controller or Voltage Regulator, with Remote Voltage sense of the Alternator output, keeps the bus voltage constant by controlling the field current increasing it when the system load increases and decreasing it when the load drops.”
Low Voltage Warning Light Output1
A warning light connected between pin I and the bus comes on to warn the pilot if the bus voltage exceeds the OV level or the alternator is off-line due to Field-to-Ground Fault Protection (GFP).
Field-to-Ground Fault Protection (GFP)
An alternator field-to-ground short will cause the field-to-ground short protector to deactivate the Controller and switch on the unit’s Red TSL, and the LV-OV indicator on the instrument panel.
Trouble-Shooting Light (TSL)
The TSL (on the unit) is designed to alert the user to the condition of the Alternator / Controller (ACU) system.
The built-in OV Sensor provides OV protection by turning off the OV relay inside the Controller if the bus voltage exceeds 16V. With the relay off, the Controller and the alternator turn off to protect sensitive avionics equipment and the battery.
- Increased Regulator life
- Reduced panel lights flicker
- Warns the Pilot of Low & OV Conditions
- Protects against grounded alternator field
- Identifies grounded field. Reduce trouble-shooting time
- Protects system loads against overexcited alternator