Sound Pressure Level; Electrical Data - Grundfos MTR Montage- Und Betriebsanleitung

P2
[%]
100
90
80
70
60
50
20 25 30 35 40 45
1000
Motor output (P2) in relation to ambient temperature
and altitude
Motor power
Curve Motor make
[kW]
1 0.06 - 0.18
1 0.25 - 0.55 Grundfos MG
2 0.75 - 22 Grundfos MG
3 30-45
Example of maximum motor load
Pump with a 2.2 kW IE3 motor (derating curve 2):
• If this pump is installed 4750 m above sea level,
the motor must not be loaded more than 88 % of
the rated output.
• At an ambient temperature of 75 °C, the motor
must not be loaded more than 78 % of the rated
output.
• If the pump is installed 4750 m above sea level at
an ambient temperature of 75 °C, multiply the
derating factors. The motor must not be loaded
more than 88 % × 78 % = 68.6 % of the rated
output.
If the motor load is not reduced in case the
ambient temperature or installation altitude
is exceeded, the motor life will be limited,
and the warranty is void.
22
3
2
1
50 55 60 65 70 75 80
t [ °C ]
2250 3500 4750 m
Motor effi-
ciency class
Siemens IE3
IE3
IE3
Siemens IE3
11.1.5 Maximum number of starts
Motor power
Recommended maximum num-
ber of starts per hour
[kW]
0.06 - 0.18
0.25 - 2.2
3-4
5.5 - 11
15-22
30-45

11.1.6 Sound pressure level

The table below shows airborne noise emitted by
pumps with motors fitted by Grundfos.
50 Hz
ISO 3743-2 / ISO
1680
L
Motor power
pA
[kW]
[dB(A)]
0.37 50
0.55 50
0.75 50
1.1 52
1.5 54
2.2 54
3.0 55
4.0 62
5.5 60
7.5 60
11 60
15 60
18.5 60
22 66
30 67
37 67
45 67.5

11.2 Electrical data

See the motor nameplate.
100
250
100
50
40
8
60 Hz
ISO 3743-2 / ISO
1680
L
pA
[dB(A)]
55
53
54
57
59
59
60
66
65
65
65
65
65
70
75
75
75