A
n
h
a
n
g
19
Fig. D
Fig. E
Airborne noise emitted by pumps with motors fitted by Grundfos
Motor
[kW]
50 Hz
60 Hz
0.37
50
55
0.55
50
53
0.75
50
54
1.1
52
57
1.5
54
59
2.2
54
59
3.0
55
60
4.0
62
66
5.5
60
65
7.5
60
65
11
60
65
15
60
65
18.5
60
65
22
66
70
30
71
75
37
71
75
45
71
75
55
71
75
75
73
77
T
M
0
2
7
4
4
5
3
5
0
3
L
pA
[dB(A)]
L
pA
[dB(A)]
20
15
12
10
8,0
6,0
5,0
4,0
3,0
2,0
1,0
0,8
0,6
0,4
0,3
0,2
0,1
1,5
120
110
90
100
80
70
60
50
40
30
20
10
0
Hv
(m)
tm
(°C)
150
130
140
25
35
45
40
30
160
170
180
190
62
79
100
126
