MIL-PRF-46795 Generating System: Alternator, Rectifier, 60 Amperes, 28 VoltsThis specification covers 28 volts \(V\), direct current \(dc\) generating systems, engine driven through belt or direct connection, to provide 60 amperes \(A\) for charging and operating loads. The system consists of a rotating field alternator with integral diode rectifier and adjustable voltage regulator in a single housing. This specification also covers repair parts for this system.

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MIL-PRF-46795H

3.4.3 Maximum current (rated output). Generating system shall supply 60 A current

under maximum load at 10 000 revolutions per minute (rpm) alternator rotor shaft speed

(see 4.9).

3.4.3.1 Non-operating current. Generating system shall exhibit non-operating current

through ignition switch circuit of not more than 300 milliamperes (mA). Further, with ignition

switch open, non-operating current from battery shall be not more than 25 mA (see 4.9.2).

3.4.4 Endurance. Generating system shall maintain set voltage (see 3.4.2.2) during

operation under various conditions of rotor shaft position, speed, and current load. There shall be

no servicing, adjustment, nor replacement of parts (see 4.10).

3.4.5 Overspeed. Generating system shall operate at 12 000 rpm under not more than

5 A load without impairing electrical or mechanical performance (see 4.11).

3.4.6 High temperature operation. Generating system shall maintain set voltage output

+ 0.2 Vdc during operation in ambient air temperature of 250 degrees Fahrenheit (F)

(121 degrees Celsius (C)). Subsequently, system shall conform to 3.4.3 (see 4.12).

3.4.7 Low temperature operation. Generating system shall maintain set voltage output

+ 0.5 Vdc during operation in ambient air temperature of minus (-) 65F (-54C). Subsequently,

system shall conform to 3.4.3 (see 4.13).

3.4.8 Shock. After testing in accordance with 4.14, generating system shall meet the

requirements of 3.4.2 and 3.4.3.

3.4.9 Vibration. During testing in accordance with 4.15, generating system shall

maintain set voltage output + 0.5 Vdc. After testing in accordance with 4.15, the generating

system shall meet the requirements of 3.4.4.

3.4.10 Submersion. Generating system shall operate during submersion in a salt-water

solution. Current from battery shall not exceed 10 A. Subsequently, voltage regulator

compartment shall contain not more than 10 cubic centimeters (cm3) of salt-water solution, and

the system shall meet the requirements of 3.4.2 and 3.4.3 (see 4.16).

3.4.11 Fungus resistance. Generating system shall meet the requirements of 3.4.2 and

3.4.3 after testing in accordance with 4.17.

3.4.12 Corrosion resistance. Generating system shall meet the requirements of 3.4.2 and

3.4.3 after testing in accordance with see 4.18.