System Manual – MOVIDRIVE® compact Drive Inverters
247
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Supply system cables and motor cables
Project Planning
Voltage drop
The cable cross section of the motor cable should be selected so the voltage drop is
as small as possible. An excessively large voltage drop means that the full motor
torque is not achieved.
The expected voltage drop can be determined using the following tables (the voltage
drop can be calculated in proportion to the length if the cables are shorter or longer).
NOTE
SEW-EURODRIVE recommends that you do not use an earth-leakage circuit breaker
with long motor cables. The earth-leakage currents caused by cable capacitance may
cause mis-tripping.
Line
Cross section
Load with I [A] =
4
6
8
10
13
16
20
25
30
40
50
63
80
100 125 150
Copper
Voltage drop
∆
U [V] with length = 100 m and
ϑ
= 70 °C
1.5 mm
2
5.3
8
10.6 13.3 17.3 21.3
1)
1) Load not permitted according to IEC60364-5-52.
2.5 mm
2
3.2
4.8
6.4
8.1 10.4 12.8
16
4 mm
2
1.9
2.8
3.8
4.7
6.5
8.0
10
12.5
6 mm
2
4.4
5.3
6.4
8.3
9.9
10 mm
2
3.2
4.0
5.0
6.0
8.2 10.2
16 mm
2
3.3
3.9
5.2
6.5
7.9 10.0
25 mm
2
2.5
3.3
4.1
5.1
6.4
8.0
35 mm
2
2.9
3.6
4.6
5.7
7.2
8.6
50 mm
2
4.0
5.0
6.0
70 mm
2
95 mm
2
150 mm
2
185 mm
2
Line
Cross section
Load with I [A] =
4
6
8
10
13
16
20
25
30
40
50
63
80
100 125 150
Copper
Voltage drop
∆
U [V] with length = 100 m and
ϑ
= 70 °C
AWG16
7.0 10.5
1)
1) More than 3 % voltage drop in relation to V
mains
= AC 460 V.
AWG14
4.2
6.3
8.4 10.5 13.6
AWG12
2.6
3.9
5.2
6.4
8.4 10.3 12.9
AWG10
5.6
6.9
8.7 10.8 13.0
AWG8
4.5
5.6
7.0
8.4 11.2
AWG6
4.3
5.1
6.9
8.6 10.8 13.7
AWG4
3.2
4.3
5.4
6.8
8.7 10.8 13.5
AWG3
2.6
3.4
4.3
5.1
6.9
8.6 10.7 12.8
AWG2
3.4
4.2
5.4
6.8
8.5 10.2
AWG1
3.4
4.3
5.4
6.8
8.1
AWG1/0
2.6
3.4
4.3
5.4
6.4
AWG2/0
2.7
3.4
4.3
5.1
AWG3/0
2.6
3.3
4.0
AWG4/0
3.1
3.8
Kcmil 250
3.0
Summary of Contents for MOVIDRIVE compact MCH41A
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