Cable Data - Grundfos S1 Instrucciones De Instalación Y Funcionamiento

8.1.2 Recommendations
Before installing a frequency converter, calculate the lowest
allowable frequency in the installation in order to avoid zero flow.
• Do not reduce the motor speed to less than 30 % of rated
speed.
• Keep the flow velocity above 1 m/sec.
• Let the pump run at rated speed at least once a day in order to
prevent sedimentation in the piping system.
• Do not exceed the frequency indicated on the nameplate.
In this case there is risk of motor overload.
• Keep the motor cable as short as possible. The peak voltage
will increase with the length of the motor cable. See data sheet
for the frequency converter used.
• Use input and output filters on the frequency converter.
See data sheet for the frequency converter used.
• Use screened motor cable if there is a risk that electrical noise
can disturb other electrical equipment. See data sheet for the
frequency converter used.
8.1.3 Consequences
When operating the pump via a frequency converter, please be
aware of these possible consequences:
• The locked-rotor torque will be lower. How much lower will
depend on the frequency converter type. See the installation
and operating instructions for the frequency converter used for
information on the locked-rotor torque available.
• The working condition of bearings and shaft seal may be
affected. The possible effect will depend on the application.
The actual effect cannot be predicted.
• The acoustic noise level may increase. See the installation
and operating instructions for the frequency converter used for
advice as to how to reduce the acoustic noise.

8.2 Cable data

Standard H07RN-F
Outer cable diameter
S
Cable type
[Inch (mm)]
pump,
2
[mm ]
range
Min.
7 x 1.5 0.57 (14.4)
50 4 x 2.5 0.66 (16.7)
4 x 6 0.62 (15.7)
4 x 6 0.62 (15.7)
54
4 x 10 0.82 (20.9)
4 x 6 0.62 (15.7)
58
4 x 10 0.82 (20.9)
4 x 6 0.62 (15.7)
62 4 x 10 0.82 (20.9)
4 x 16 0.94 (23.8)
4 x 10 0.82 (20.9)
66 4 x 16 0.94 (23.8)
4 x 25 1.1 (28.9)
4 x 25 1.1 (28.9)
4 x 35 1.3 (32.5)
70
4 x 50 1.5 (37.7)
4 x 70 1.7 (42.7)
Bending
radius
[Inch (cm)]
Max.
0.65 (16.4) 3.94 (10)
0.74 (18.7) 4.72 (12)
0.68 (17.2) 4.33 (11)
0.68 (17.2) 14.33 (11)
0.92 (23.4) 5.51 (14)
0.68 (17.2) 4.33 (11)
0.92 (23.4) 5.51 (14)
0.68 (17.2) 4.33 (11)
0.92 (23.4) 5.51 (14)
1 (26.3) 6.3 (16)
0.92 (23.4) 5.51 (14)
1 (26.3) 6.3 (16)
1.2 (31.4) 7.48 (19)
1.2 (31.4) 7.48 (19)
1.4 (34.7) 8.66 (22)
1.6 (40.4) 9.84 (25)
1.8 (45.4) 11 (28)
EMC
Outer cable diameter
S
Cable type
[Inch (mm)]
pump,
2
[mm ]
range
Min.
50 3 x 6 0.54 (13.6)
3 x 6 0.54 (13.6)
54
3 x 10 0.7 (17.8)
3 x 6 0.54 (13.6)
58
3 x 10 0.7 (17.8)
3 x 6 0.54 (13.6)
62 3 x 10 0.7 (17.8)
3 x 16 0.82 (20.9)
3 x 10 0.7 (17.8)
66 3 x 16 0.82 (20.9)
3 x 35 1.1 (28.3)
3 x 35 1.1 (28.3)
70
3 x 70 1.5 (38.7)
Control cables
Outer cable diameter
Cable type
[Inch (mm)]
2
[mm ]
Min.
7 x 1.5 0.57 (14.4)
10 x 1.5 0.71 (18)
Warning
The top cover of explosion-proof pumps is
provided with an external earth terminal to
ensure the connection to earth. The electrical
installation must include an external connection
from this terminal to earth. The earth conductor
must fulfil all electrical safety regulations in
force.
Cross section of phase
conductor (S) of the
installation
2 2
[Inch (mm )]
S ≤ 0.025 (16)
0.025 (16) < S ≤ 0.054 (35)
S > 0.054 (35)
Bending
radius
[Inch (cm)]
Max.
0.6 (15.2) 3 (7.6)
0.6 (15.2) 3 (7.6)
0.78 (19.8) 3.9 (9.9)
0.6 (15.2) 3 (7.6)
0.78 (19.8) 3.9 (9.9)
0.6 (15.2) 3 (7.6)
0.78 (19.8) 3.9 (9.9)
0.9 (22.9) 4.5 (11.5)
0.78 (19.8) 3.9 (9.9)
0.9 (22.9) 4.5 (11.5)
1.2 (31.3) 6.2 (15.7)
1.2 (31.3) 6.2 (15.7)
1.6 (41.7) 8.2 (20.9)
Bending
radius
[Inch (cm)]
Max.
0.63 - 0.64
3.9 (10)
(16.0 - 16.4)
0.79 (20) 4.7 (12)
Minimum cross section of
earth conductor
2 2
[Inch (mm )]
S
0.025 (16)
0.5 *S, max. 0.11 (70)
17