Megging; Technical Data, Single-Phase Motors; Technical Data, Three-Phase Motors - Grundfos CRE Instrucciones De Instalación Y Operación

10.1.4 Humidity
Maximum humidity: 95 %.
If the humidity is constantly high and above 85 %, open the drain
holes in the drive-end flange. See section
covers (not supplied by Grundfos).
10.1.5 Motor cooling
To ensure cooling of motor and electronics, observe the following:
• Position the motor in such a way that adequate cooling is
ensured. See section 4.1.5 Ensuring motor
• The temperature of the cooling air must not exceed 122 °F (50
°C).
Keep cooling fins and fan blades clean.

10.2 Megging

Do not meg an installation incorporating MLE motors, as the
built-in electronics may be damaged.

10.3 Technical data, single-phase motors

10.3.1 Supply voltage
• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Recommended fuse size
Motor size
Hp [kW]
0.33 - 1 (0.25 - 0.75)
1 1/2 - 2 (1.1 - 1.5)
You can use standard as well as quick-blow or slow-blow fuses.
10.3.2 Leakage current
Ground leakage current less than 3.5 mA, AC.
Ground leakage current less than 10 mA, DC.
The leakage currents are measured in accordance with EN
61800-5-1:2007.
64
Fig. 2 Examples of
cooling.
Minimum Maximum
[A] [A]
6 10
10 16

10.4 Technical data, three-phase motors

10.4.1 Supply voltage
• 3 x 440-480 V - 10 %/+ 10 %, 50/60 Hz, PE.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Recommended fuse size
Motor size
[Hp (kW)]
0.33 - 1 1/2 (0.25 - 1.1)
2 (1.5)
3 (2.2)
5 (4)
7 1/2 (5.5)
10 (7.5)
15 (11)
Standard as well as quick-blow or slow-blow fuses may be used.
• 3 x 200-240 V, 60 Hz (supply voltage V)
Recommended fuse size
Motor size
[Hp (kW)]
1 1/2 (1.1)
2 (1.5)
3 (2.2)
5 (4)
7 1/2 (5.5)
10.4.2 Leakage current (AC)
Speed Power
-1
[min ] [Hp (kW)]
0.33 - 3
(0.25 - 2.2)
5 - 7 1/2
2900-4000
(4 - 5 1/2)
10 - 15
(7 1/2 - 11)
0.33 - 3
(0.25 - 2.2)
5 - 7 1/2
4000-5900
(4 - 5.5)
10-15
(7.5 - 11)
The leakage currents are measured in accordance with EN
61800-5-1:2007.
Minimum Maximum
[A] [A]
6 6
6 10
6 16
13 16
16 32
20 32
32 32
Minimum Maximum
[A] [A]
10 20
10 20
13 35
25 35
32 35
Power supply Leakage
voltage current
[V] [mA]
≤ 400
< 3.5
> 400 < 5
≤ 400
< 3.5
> 400 < 3.5
≤ 400
< 3.5
> 400 < 5
≤ 400
< 3.5
> 400 < 5
≤ 400
< 3.5
> 400 < 3.5
≤ 400
< 3.5
> 400 < 5