Appendix
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.
Tolerances are according to ISO 4871.
50 Hz
-1
2-pole: n = 2900 min
-1
4-pole: n = 1450 min
-1
6-pole: n = 970 min
Maximum sound pressure level [dB(A)] - ISO 3743
Motor
Three-phase motors
[kW]
2-pole
0.25
56
0.37
56
0.55
57
0.75
56
1.1
59
1.5
58
2.2
60
3
59
4
63
5.5
63
7.5
60
11
60
15
60
18.5
60
22
66
30
71
37
71
45
71
55
71
75
73
90
73
110
76
132
76
160
76
200
76
250
82
315
82
355
77
400
-
4-pole
6-pole
41
-
45
-
42
40
42
43
50
43
50
47
52
52
52
63
54
63
57
63
58
66
60
66
60
66
63
66
63
66
65
59
66
60
66
58
67
58
70
61
70
61
70
61
70
61
70
65
70
-
73
-
73
-
75
-
75
60 Hz
-1
2-pole: n = 3500 min
-1
4-pole: n = 1750 min
-1
6-pole: n = 1170 min
Maximum sound pressure level [dB(A)] - ISO 3743
Motor
Three-phase motor
[kW]
2-pole
0.25
-
0.37
-
0.55
-
0.75
-
1.1
64
1.5
64
2.2
65
3
54
4
68
5.5
68
7.5
73
11
70
15
70
18.5
70
22
70
30
71
37
71
45
75
55
75
75
77
90
77
110
81
132
81
160
81
200
81
280
86
288
-
353
86
362
-
398
81
408
-
460
-
1
4-pole
6-pole
-
-
-
-
-
-
-
-
51
43
52
47
55
52
57
63
56
63
62
63
62
66
66
66
66
66
63
66
63
66
65
62
65
63
65
62
68
62
71
66
71
66
75
66
75
66
75
69
75
-
-
-
77
-
-
-
77
-
79
-
79
-
709