Grundfos NBG Series - Page 30

Appendix
30
Appendix 1
Sound pressure levels
The data in this table applies for pump including
motor, (MG, MMG, Siemens and TECO motors).
The values stated are maximum sound pressure
levels. Tolerences are according to ISO 4871.
50 Hz
2-pole: n = 2900 min
-1
4-pole: n = 1450 min
-1
6-pole: n = 970 min
-1
60 Hz
2-pole: n = 3500 min
-1
4-pole: n = 1750 min
-1
6-pole: n = 1170 min
-1
Motor
[kW]
Maximum sound pressure level
[dB(A)] - ISO 3743
Three-phase motors
2-pole 4-pole 6-pole
0.25 56 41 -
0.37 56 45 -
0.55 57 42 40
0.75 56 42 43
1.1595043
1.5585047
2.2605252
3 595263
4 635463
5.5635763
7.5605866
11 60 60 66
15 60 60 66
18.5 60 63 66
22 66 63 66
30 71 65 59
37 71 66 60
45 71 66 58
55 71 67 58
75 73 70 61
90 73 70 61
110767061
132 76 70 61
160 76 70 65
200 76 70 -
250 82 73 -
315 82 73 -
355 77 75 -
400 - 75
Motor
[kW]
Maximum sound pressure level
[dB(A)] - ISO 3743
Three-phase motor
2-pole 4-pole 6-pole
0.25 - -
-
0.37 - -
-
0.55 - -
-
0.75 - -
-
1.1 64 51
43
1.5 64 52 47
2.2 65 55 52
3545763
4685663
5.5 68 62
63
7.5 73 62
66
11 70 66
66
15 70 66
66
18.5 70 63
66
22 70 63
66
30 71 65
62
37 71 65
63
45 75 65
62
55 75 68
62
75 77 71
66
90 77 71
66
110 81 75
66
132 81 75
66
160 81 75
69
200
81 75 -
280
86 - -
288
-77-
353
86 - -
362
-77-
398
81
408 -79-
460 - 79 -