Alternator Controller/Regulator, 28v (Homebuilt)

The LR3C Controller combines three essential devices in one physical container, making it a lightweight, space-saving, and cost-effective alternative for any aircraft electrical system, while also improving safety of flight.  First, the LR3C operates as a “quiet,” linear regulator, generating no audio or radio noise (in contrast to switching-type regulators). Second, it provides a vital safeguard for your aircraft electrical system with a solid-state, “crowbar” overvoltage protection circuit. And third, the LR3C Controller functions as an important low-voltage monitoring and warning system.

Used on all externally regulated alternators using circuit type "B" (one field lead grounded directly) except B&C alternators used in 28v systems.  This 28v regulator will NOT work with a B&C alternator.

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Installation Advisory:

Select a location for mounting that will protect unit from heat, vibration, and water. The pilot side of the firewall, or inside the cabin near the instrument panel, is recommended.

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LR3C-28 Wiring Diagram and Installation Instructions