Sens NRG24-20 Specifications Page 34

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Sound Data
20DSKBA
60Hz
Soun
d Pressure Levels @ 7 meters dB(A)
Position (Note 1)
Configuration
1 2
3 4 5 6 7 8
8 Position
Average
Standard-Unhoused (Note 3)
Inf
inite
Exhaust
71.0 75.0 73.5 73.5 70.8 73.7 71.3 74.4 73.2
F182 - Enclosure-Steel,
Wea
ther Protective,with
ExhSys
Mounted
Muffler
78.8 81.3 80.7 80.0 78.8 79.0 78.1 80.6 79.8
F216- Enclosure-
Alu
minum,Weather
Protective,w/Exh System
Mounted
Muffler
78.8 81.3 80.7 80.0 78.8 79.0 78.1 80.6 79.8
F172 - Enclosure-Steel,Sound
Att
,Level 1,w/Exhaust System
Mounted
Muffler
74.0 72.6 66.9 66.3 66.6 68.5 71.5 76.1 72.3
F173 - Enclosure-Steel,Sound
Att
,Level 2,w/Exhaust System
Mounted
Muffler
65.0 65.4 64.5 64.8 66.6 68.5 68.4 69.4 67.0
F217- Enclosure-
Alu
minum,Sound Att,Level
2,w/ExhSystem
Mounted
Muffler
67.0 67.4 66.5 66.8 68.6 70.5 70.4 71.4 69.0
Not
e:
1. Position 1 faces the engine front at 23 feet (7 m) from the surface of the generator set. The positions proceed around the generator set in a
counter-clockwise direction in 45° increments.
2. Data based on full rated load with standard radiator-fan package.
3. Sound data for generator set with infinite exhaust do not include exhaust noise.
4. Sound pressure levels per ANSI S1.13-1971 as applicable.
5.
Reference sound pressure is 10 µPa.
6. Sound pressure levels are subject to instrumentation, measurement, installation and generator set variability.
Sound Power Levels dB(A)
Octave Band Center Frequency (Hz)
Configuration
63
125 250 500 1000 2000 4000 8000
Sound Power
Level
Standard-Unhoused (Note 3)
Inf
inite
Exhaust
78.7 83.3 86.9 91.9 94.9 95.5 92.6 87.8 100.6
F182 - Enclosure-Steel, Weather
Pro
tective,with ExhSys
Mounted
Muffler
88.2 97.2 98.8 92.8 103.4 96.6 98.0 97.4 107.4
F216- Enclosure-
Alu
minum,Weather
Protective,w/Exh System
Mounted
Muffler
88.2 97.2 98.8 92.8 103.4 96.6 98.0 97.4 107.4
F172 - Enclosure-Steel,Sound
Att
,Level 1,w/Exhaust System
Mounted
Muffler
86.9 94.0 92.0 89.7 91.8 92.1 88.0 78.5 102.2
F173 - Enclosure-Steel,Sound
Att
,Level 2,w/Exhaust System
Mounted
Muffler
86.5 94.0 89.3 85.9 83.9 84.8 81.0 71.7 96.9
F217- Enclosure-
Alu
minum,Sound Att,Level
2,w/ExhSystem
Mounted
Muffler
88.5 96.0 91.3 87.9 85.9 86.8 83.0 73.7 98.9
Not
e:
1. Sound pressure levels per ANSI S12.34-1988 and SIO 3744 as applicable.
2. Data based on full rated load with standard radiator-fan package.
3. Sound data for generator set with infinite exhaust do not include exhaust noise.
4. Reference sound pressure is 1pW-1x10
-12
W.
5. Sound pressure levels are subject to instrumentation, measurement, installation and generator set variability.
Exhaust Sound Pressure Levels @ 1 meter dB(A)
Octave Band Center Frequency (Hz)
63 125 250 500 1000 2000 4000 8000
Sound
Pressure Level
Open Exhaust (No Muffler) @ Rated Load
72.4 85.0 85.6 91.4 100.3 101.7 100.7 99.0 106.7
Note: Sound pressure level per ISO 6798 Annex A as applicable.
Cummins Power Generation
Data and Specification Subject to Change Without Notice
Bulletin msp-1075
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