Hướng dẫn chọn dây dẫn, thanh cái theo tiêu chuẩn IEC 60439

Range of rated current 1)

Conductor cross-sectional area 2), 3)

A

mm²

AWG/MCM

0

8

1,0

18

8

12

1,5

16

12

15

2,5

14

15

20

2,5

12

20

25

4,0

10

25

32

6,0

10

32

50

10

8

50

65

16

6

65

85

25

4

85

100

35

3

100

115

35

2

115

130

50

1

130

150

50

0

150

175

70

00

175

200

95

000

200

225

95

0000

225

250

120

250

250

275

150

300

275

300

185

350

300

350

185

400

350

400

240

500

1) 2) 3)

The value of the rated current shall be greater than the first value in the first column and less than or equal to the second value in that column. For convenience of testing and with the manufacturer’s consent, smaller conductors than those given for a stated rated current may be used. Either of the two conductors specified for a given rated current range may be used.

Test conductors

Values of the rated current A

Range of rated current 1) A

Cables

Copper bars 2)

Quantity

Cross sectional area 3) mm2

Quantity

Dimensions 3) mm

500

400 to 500

2

150(16)

2

30 × 5(15)

630

500 to 630

2

185(18)

2

40 × 5(15)

800

630 to 800

2

240(21)

2

50 × 5(17)

1 000

800 to 1000

2

60 × 5(19)

1 250

1 000 to 1250

2

80 × 5(20)

1 600

1 250 to 1600

2

100 × 5(23)

2 000

1 600 to 2000

3

100 × 5(20)

2 500

2 000 to 2500

4

100 × 5(21)

3 150

2 500 to 3150

3

100 × 10(23)

1)

The value of the current shall be greater than the first value and less than or equal to the second value.

2)

Bars are assumed to be arranged with their long faces vertical. Arrangements with long faces horizontal may be used if specified by the manufacturer.

3)

Values in brackets are estimated temperature rises (in kelvins) of the test conductors given for reference.

Cross-sectional area of phase conductors S

Minimum cross-sectional area of the corresponding protective conductor (PE, PEN) Sp

mm2

mm2

S ≤

16

S

16 < S ≤

35

16

35 < S ≤

400

S/2

400 < S ≤

800

200

800 < S

S/4