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32
9.3 Sound pressure level
The data in this table applies for pumps including
motor, such as MG, MMG, Siemens and TECO
motors.
The values stated are maximum sound pressure
levels. Tolerances are according to ISO 4871.
50 Hz
60 Hz
2-pole:
n = 2900 min
-1
4-pole:
n = 1450 min
-1
6-pole:
n = 970 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
1.1
59
50
43
1.5
58
50
47
2.2
60
52
52
3
59
52
63
4
63
54
63
5.5
63
57
63
7.5
60
58
66
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
110
76
70
61
132
76
70
61
160
76
70
65
200
76
70
-
250
82
73
-
315
82
73
-
355
77
75
-
400
-
75
-
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
-
-
-
0.37
-
-
-
0.55
-
-
-
0.75
-
-
-
1.1
64
51
43
1.5
64
52
47
2.2
65
55
52
3
54
57
63
4
68
56
63
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
-
