MIL-DTL-38195D
b.
200 Ampere at 28 VDC (measured at DC output receptacle using a load bank).
c.
60 kW, any combination of AC or DC.
3.5.1.2 Overload rating. The overload rating of the electrical output of the set shall be as follows (see 4.2; 4.3.3;
4.5.1 and 4.6.9.1):
a.
75 kW at 0.8 PF, 3-phase, 4 wire, 120/208V, 400 Hz for 5 minutes.
b.
300 Ampere at 28 VDC for 5 minutes (current limits at 300 Amperes for 20 seconds minimum).
c.
75 kW, any combination of AC or DC for 5 minutes.
3.5.2 Pneumatic performance. The continuous, automatically controlled, rated pneumatic output of the set at the
bleed air outlet flange shall meet the minimum conditions in Table I. Airflow measurements shall be made in
accordance with (IAW) the procedures specified in ASME Power Test Code 19.5; 5-1949, Part 5, Chapter 4, or by
method acceptable to the procuring activity (see 3.11).
3.5.3 Combined pneumatic and electrical output. The set shall be rated for continuous duty at full speed and
rated turbine temperature. The unit shall continuously supply the air output, as specified elsewhere in this specifica-
tion without exceeding rated turbine temperature. Rated turbine temperature & its measurement shall be in
accordance with (IAW) the turbine manufacturer's specifications. (See Table I and Table V)
3.5.4 Fuel consumption. At the horsepower required to produce rated load (see 6.3.6) at standard sea level
conditions, the specific fuel consumption of the set shall not exceed 1.5 pounds per shaft horsepower per hour (see
4.5.2).
3.5.5 Audio noise. The audio noise emanating from the generator set, when it is operating at any load up to and
including maximum rated speed and load, at a distance of not more than twenty-five (25) feet in any direction from
the perimeter of the set shall not exceed the values as specified (see 4.5.2 and 4.6.2):
a. Eighty-five decibels as measured on the A-scale of a standard sound level meter at slow response
(85 dB), reference 0.0002 microbar, or
b. The sound pressure level in any octave band center frequency given below as measured with an
octave band filter set at slow response:
Octave Band Center Frequency (Hz)
63
125
250
500
1,000
2,000
4,000
8000
Sound Pressure Level
(dB, reference 0.0002
101
91
84
79
76
74
74
75
..microbar)
3.5.5.1 Measurement. Measurement of the sound pressure levels emanating from the set shall be measured with
the sound level meter microphone or the octave band filter set microphone located sixty-eight (68) inches above
ground level at the following positions:
a.
The position normally occupied by the generator set operator; and
b. On concentric circles of 5 feet, 15 feet and 25 feet from the perimeter of the set at the center of
each side of the set and at each corner of the set (8 measurement locations for each distance); and
c.
Other locations as deemed appropriate (see 4.6.2).
3.5.5.2 Sound level meter. The sound level meter used shall conform to ANSI S1.4, Type 2. The octave band
filter set used shall conform to ANSI Sl. 11 Type E, Class II.
5
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