Grundfos NB Series, Installation And Operating Instructions Manual

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461
Airborne noise emitted by pumps with MG, MMG, Siemens and TECO motors
50 Hz
2-pole: n = 2900 min
-1
4-pole: n = 1450 min
-1
6-pole: n = 970 min
-1
Motor
[kW]
L
pA
[dB(A)]
MG
model B
MG model C
MG
model D
Siemens MMG model E TECO
4-pole 2-pole 4-pole 2-pole 2-pole 4-pole 6-pole 2-pole 4-pole 6-pole 2-pole 4-pole 6-pole
0.25 42
0.37 42 40 51 58 59
0.55 42 40 51 60 58 59
0.75 56 42 43 52 62 58 59
1.1 55 51 59 48 43 52 62 59 59
1.5 58 55 58 48 47 53 64 59 59
2.2 57 52 60 53 52 57 64 62 59
3.0 59 56 59 53 63 61 65 62 58
4.0 66 59 63 53 63 61 65 63 61
5.5 63 57 63 62 63 61 70 63 60
7.5 73 68 62 66 63 65 73 62 61
11.0 70 66 66 78 67 65 76 69 62
15.0 70 66 66 78 67 65 76 69 65
18.5 70 63 66 78 68 68 76 72 69
22.0 70 63 66 82 68 68 83 72 70
30.0 71 65 59 84 71 68 88 76 74
37.0 71 66 60 84 73 70 88 82 75
45.0 71 66 58 84 73 72 90 82 75
55.0 71 67 58 85 75 72 91 83 81
75.0 73 70 61 86 78 77 91 83 81
90.0 73 70 61 86 78 77 92 85 84
110.0 76 70 61 89 85 77 92 85 84
132.0 76 70 61 89 85 93 88 84
160.0 76 70 92 89 93 90
200.0 76 70 92 89 93 90
250.0 82 73 95 93 95 92
315.0 82 73 95 93 95 94
355.0 77