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6.3
Anticipated noise levels for standard
pumps
Installation and operating instructions Wilo-CronoNorm-NL, NLG
Anticipated noise levels for standard pumps:
Motor power
Measuring surface sound-pressure level
P
[kW]
N
≤ 0.55
0.75
1.1
1.5
2.2
3.0
4.0
5.5
7.5
11
15
18.5
22
30
37
45
55
75
90
110
132
160
200
250
315
Tab. 2: Anticipated noise levels for standard pumps
1)
Spatial mean value of sound-pressure levels within a cube-shaped measuring area at a
distance of 1 m from the surface of the motor
1)
Lp, A [dB(A)]
Pump with three-phase motor
without speed control
-1
2900 min
1450 min
52
58
60
51
60
53
67
55
67
59
67
59
67
59
71
63
71
63
74
65
74
65
74
71
76
71
79
72
79
73
79
73
79
74
80
72
81
70
81
72
-
72
-
72
-
73
-
74
-
74
English
-1
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