Wilo Atmos GIGA-NHT Installation And Operating Instructions Manual page 15

5.7.2 Pump with three-phase motor,
60 Hz without speed control
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
Motor power P [kW]
N
2.2
3
4
5.5
7.5
9
11
15
18.5
22
30
37
45
55
75
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
Table 1: Anticipated noise levels for norm pump (50 Hz)
Motor power P [kW]
N
0.37
0.55
0.75
1.1
1.5
2.2
3
3.7
4.5
5.5
7.5
9.2
11
15
18.5
22
30
37
45
55
75
90
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
Table 2: Anticipated noise levels for norm pump (60 Hz)
Measuring surface sound-pressure level Lp, A [dB(A)]
2-pole (2900 rpm)
64
69
66
64
72
72
72
72
72
77
80
80
77
76
79
Measuring surface sound-pressure level Lp, A [dB(A)]
2-pole (3500 rpm)
–
62
62
64
64
70
70
73
71
71
74
74
74
74
74
74
78
78
81
81
81
83
en
1)
4-pole (1450 rpm)
55
55
58
58
63
65
65
65
70
70
71
72
72
66
71
1)
4-pole (1750 rpm)
49
50
53
53
53
56
58
58
58
60
60
60
66
66
66
66
68
68
69
70
75
75
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