Grundfos NBE Series, Installation And Operating Instructions Manual

Page: 33 / 37

33
Enclosure class
• Single-phase pumps: IP 55 (IEC 34-5).
• Three-phase pumps, 0.75-7.5 kW: IP 55 (IEC 34-5).
• Three-phase pumps, 11-22 kW: IP 55 (IEC 34-5).
Insulation class
F (IEC 85).
Ambient temperature
During operation:
• Min – 20 °C
• Max + 40 °C. without derating
During storage/transport:
• – 30 °C to + 60 °C (0.37-7.5 kW)
• – 25 °C to + 70 °C (11-22 kW).
Relative air humidity
Maximum 95 %.
Sound pressure level
Single-phase pumps:
<70 dB(A).
Three-phase pumps:
Motor
[kW]
Speed stated on nameplate
[min
-1
]
Sound pressure level
[dB(A)]
2-pole 4-pole
0.55
1400-1500 47
1700-1800 52
0.75
1400-1500 47
1700-1800 52
2800-3000 60
3400-3600 65
1.1
1400-1500 49
1700-1800 53
2800-3000 60
3400-3600 65
1.5
1400-1500 53
1700-1800 57
2800-3000 65
3400-3600 70
2.2
1400-1500 50
1700-1800 52
2800-3000 65
3400-3600 70
3.0
1400-1500 55
1700-1800 60
2800-3000 65
3400-3600 70
4.0
1400-1500 58
1700-1800 63
2800-3000 70
3400-3600 75
5.5
1400-1500 57
1700-1800 59
2800-3000 75
3400-3600 80
7.5
1400-1500 59
1700-1800 61
2800-3000 67
3400-3600 72
11
1400-1500 63
1700-1800 64
2800-3000 64
3400-3600 68
15
1400-1500 65
1700-1800 66
2800-3000 65
3400-3600 68
18.5
1400-1500 69
1700-1800 72
2800-3000 69
3400-3600 70
22
1400-1500 –
1700-1800 –
2800-3000 67
3400-3600 70