Eng
lish (US)
32
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 Fig. 2 Examples of 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
.
• 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
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.
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
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
10.4.2 Leakage current (AC)
The leakage currents are measured in accordance with EN
61800-5-1:2007.
Motor size
Hp [kW]
Minimum
[A]
Maximum
[A]
0.33 - 1 (0.25 - 0.75)
6
10
1 1/2 - 2 (1.1 - 1.5)
10
16
Motor size
[Hp (kW)]
Minimum
[A]
Maximum
[A]
0.33 - 1 1/2 (0.25 - 1.1)
6
6
2 (1.5)
6
10
3 (2.2)
6
16
5 (4)
13
16
7 1/2 (5.5)
16
32
10 (7.5)
20
32
15 (11)
32
32
Motor size
[Hp (kW)]
Minimum
[A]
Maximum
[A]
1 1/2 (1.1)
10
20
2 (1.5)
10
20
3 (2.2)
13
35
5 (4)
25
35
7 1/2 (5.5)
32
35
Speed
[min
-1
]
Power
[Hp (kW)]
Power supply
voltage
[V]
Leakage
current
[mA]
2900-4000
0.33 - 3
(0.25 - 2.2)
≤
400
< 3.5
> 400
< 5
5 - 7 1/2
(4 - 5 1/2)
≤
400
< 3.5
> 400
< 3.5
10 - 15
(7 1/2 - 11)
≤
400
< 3.5
> 400
< 5
4000-5900
0.33 - 3
(0.25 - 2.2)
≤
400
< 3.5
> 400
< 5
5 - 7 1/2
(4 - 5.5)
≤
400
< 3.5
> 400
< 3.5
10-15
(7.5 - 11)
≤
400
< 3.5
> 400
< 5
