Which component is responsible for generator control and safety in the electrical system?

• A. GDC
• B. APU
• C. GCU
• D. IGU

Answer: (C)

The generator control and safety responsibilities are handled by the Generator Control Unit. This unit constantly monitors key electrical parameters—voltage, current, and frequency—so the generator can be driven to produce the correct power level and stay in step with the bus. It also provides protective functions, automatically disconnecting a generator or activating protective trips if faults occur, such as overcurrent, undervoltage/overvoltage, or a generator fault. In a UH-60, each generator is managed by its GCU to regulate output, coordinate with other generators for proper load sharing, and ensure safe isolation from the electrical system when necessary. Other components may relate to the physical generator or power source, but the GCU is the primary controller and safety interlock for generator operation.