Recommended cross section

The cross section of the supply system cables must be dimensioned based on the nominal line current Iline.

SEW-EURODRIVE suggests the following cable cross sections. These cable cross sections apply under the following conditions:

  • The conductors are made of copper with PVC insulation, operating temperature 70 °C.
  • The cables are routed according to IEC 60204-1 installation type C at an ambient temperature of 40 °C, accumulation 1.
  • Dimensioning is based on continuous current Icont, see table "Derating" in chapter Project planning.

MDX9.A-….-5.3..

Unit

Size

1

2

3

4

5

0020

0025

0032

0040

0055

0070

0095

0125

0160

0240

0320

0460

0620

0750

Nominal output current IN

A

2

2.5

3.2

4

5.5

7

9.5

12.5

16

24

32

46

62

75

Nominal line current AC Iline

A

1.8

2.3

2.9

3.6

5

6.3

8.6

11.3

14.4

22

32

41.4

55.8

67.5

Supply system cable
L1/L2/L3

mm2

1.5

2.5

6

10

16

25

35

Protective device: miniature circuit breaker / motor circuit breaker

A

10

16

20

32

50

63

80

100

MDX9.A-….-5.3..

Unit

Size

6

7

8

0910

1130

1490

1170

2200

2500

3000

3800

4700

5880

Nominal output current IN

A

91

113

149

177

220

250

300

380

470

588

Nominal line current AC Iline

A

81.9

102

134

159

198

225

270

342

423

529

Supply system cable
L1/L2/L3

mm2

50

70

120

150

240

The supply system cable must be configured according to project-specific requirements. Generally, the supply system cable is made up of single conductors routed in parallel.

Protective device: miniature circuit breaker / motor circuit breaker

A

125

160

200

250

315

400

500

630

MDX9.A-….-2.3..

Unit

Size

2

3

4

5

6

0070

0093

0140

0213

0290

0420

0570

0840

1080

Nominal output current IN

A

7

9.3

14

21.3

29

42

57

84

108

Nominal line current AC Iline

A

6.3

8.4

12.6

19.2

26.1

37.8

51.3

75.6

97.2

Supply system cable
L1/L2/L3

mm2

1.5

2.5

6

10

25

35

50

Protective device: miniature circuit breaker / motor circuit breaker

A

10

16

20

32

40

50

80

100

125

INFORMATION

Recommended cross section
The values are only recommendations. They are no substitute for detailed project planning of the cables depending on the concrete application and considering the applicable regulations.

INFORMATION

Securing the supply system cable
  • Secure the supply system cable with appropriate safety elements.
  • When selecting the supply system cable, make sure that the selected cross section is in the range of the connectable cross section of the terminals.
  • When selecting the line fuse, observe chapter Line fuses and miniature circuit breakers.

INFORMATION

Use of a residual current device
If using a residual current device is not mandatory according to the standards, SEW-EURODRIVE recommends not using a residual current device. Leakage currents caused by cable capacitances can lead to false tripping.