Other Technical Data; Ambient Temperature And Altitude - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

28.3 Other technical data

28.3.1 EMC (electromagnetic compatibility to EN 61800-3)
Motor
Emission/immunity
[hp]
Emission:
The motors may be installed in residential areas (first
3 environment), unrestricted distribution,
5 corresponding to CISPR11, group 1, class B.
7.5
10
Immunity:
The motors fulfill the requirements for both the first
and second environment.
Emission:
The motors are category C3, corresponding to
CISPR11, group 2, class A, and may be installed in
industrial areas (second environment).
If equipped with an external Grundfos EMC filter, the
motors are category C2, corresponding to CISPR11,
group 1, class A, and may be installed in residential
areas (first environment).
When the motors are installed in
15
residential areas, supplementary
20
measures may be required as the motors
25
may cause radio interference.
30
Motor sizes 15, 25, and 30 hp comply with EN
61000-3-12 provided that the short-circuit power at
the interface point between the user's electrical
installation and the public power supply network is
greater than or equal to the values stated below. It is
the responsibility of the installer or user to ensure, by
consultation with the power supply network operator,
if necessary, that the motor is connected to a power
supply with a short-circuit power greater than or
equal to these values:
Motor size
[hp]
15
20 25
30
20 hp motors do not comply with EN 61000-3-12.
By installing an appropriate harmonic filter between the motor
and the power supply, the harmonic current content will be
reduced. In this way, the 20 hp motor will comply with EN
61000-3-12.
Immunity:
The motors fulfill the requirements for both the first and second
environment.
Contact Grundfos for further information.
All manuals and user guides at all-guides.com
Short-circuit power
[kVA]
1500
- 2700
3000
Enclosure class
• Three-phase pumps, 3-10 hp: IP55 (IEC 34-5)
• Three-phase pumps, 15-30 hp: IP55 (IEC 34-5).
Insulation class
F (IEC 85)
28.3.2 Flow rate
Minimum flow rate
The pump must not run against closed outlet valve as this will
cause an increase in temperature/formation of steam in the
pump.
This may cause shaft damage, impeller erosion, short life of
bearings, damage to stuffing boxes (packing) or mechanical shaft
seals due to stress or vibration.
The minimum continuous flow rate is shown when selecting the
pump in Grundfos Express.
Maximum flow rate
The maximum flow rate must not exceed the value stated on the
nameplate. If the maximum flow rate is exceeded, cavitation and
overload may occur.

28.3.3 Ambient temperature and altitude

The ambient temperature and the installation altitude are
important factors for the motor life, as they affect the life of the
bearings and the insulation system.
Overheating may result from excessive ambient temperature or
the low density and consequently low cooling effect of the air.
In such cases, it may be necessary to use a motor with a higher
output.
Ambient temperature
During operation:
• Min -4 °F (-20 °C)
• Max +104 °F (40 °C) without derating.
During storage/transport:
• -40 °F (-40 °C) to +140 °F (+60 °C) (3-10 hp)
• -13 °F (-25 °C) to +158 °F (70 °C) (15-30 hp).
28.3.4 Relative air humidity
Maximum 95 %.
28.3.5 Sound pressure level
Motor
[hp]
hp 2-pole
3
5
7.5
10
15
20
25
30
Sound pressure level
[dB(A)]
4-pole
82 64
87 75
93 69
82 71
68 64
68 66
70 72
70
53