Maximum GPU voltage is what?

Maximum GPU voltage is what?

• A. 30v
• B. 28v
• C. 32v
• D. 34v

Answer: (A)

The maximum voltage from a Ground Power Unit (GPU) to an aircraft is the upper limit the aircraft’s electrical system is designed to tolerate. For a typical 28V DC system, you want to protect sensitive avionics and power equipment from overvoltage and from transient spikes. Setting a ceiling at 30V gives a small margin above the nominal 28V while staying within safe limits for components and protection circuits. Values around 28V are normal operating voltage, while voltages of 32V or 34V would exceed what the system is rated to handle and could trigger protective actions or cause damage. So, the safe, specified maximum is 30V.

The maximum voltage from a Ground Power Unit (GPU) to an aircraft is the upper limit the aircraft’s electrical system is designed to tolerate. For a typical 28V DC system, you want to protect sensitive avionics and power equipment from overvoltage and from transient spikes. Setting a ceiling at 30V gives a small margin above the nominal 28V while staying within safe limits for components and protection circuits. Values around 28V are normal operating voltage, while voltages of 32V or 34V would exceed what the system is rated to handle and could trigger protective actions or cause damage. So, the safe, specified maximum is 30V.