Question

Of the following lists, which one

gives the power requirements for the
TTU-205C/E test set?
1. 28 Vdc, three-phase, 360 hertz
2. 28 Vdc, 115 Vat, single phase,
400 hertz
3. 115 Vac, single phase, 400 hertz
4. 115 Vac, three-phase, 400 hertz

Answer 1

The correct power requirement for the TTU-205C/E test set is most likely option 3: 115 Vac, single phase, 400 hertz, aligning with the 400-Hz AC power used in military aircraft.

Step-by-step explanation:

To determine which list gives the power requirements for the TTU-205C/E test set, we must understand such equipment typically requires a specific type of power input. Military aircraft, for example, use 400-Hz AC power because equipment designed for higher frequencies can be lighter weight, an essential factor in aerospace applications. The time for one complete cycle of 400-Hz power is calculated as the reciprocal of the frequency, which is 1/400 seconds or 2.5 milliseconds per cycle.

That said, of the lists provided, option 3: 115 Vac, single phase, 400 hertz, is likely to be the correct power requirement for the TTU-205C/E test set, as it matches the criteria of an AC power source with the 400-Hz frequency commonly used in military aircraft equipment. The other options either have incorrect frequencies or voltage types that do not align with standard military aircraft power systems.