Short Circuit Current Ratings

Short Circuit Current Ratings

The short circuit currents quoted here are for cables operating normally at maximum conductor temperature of 90℃.

XLPE insulation is actually capable of withstanding short-term temperature up to 250℃.

According to ICEA P-32-382 Curves based on formula:

 

I: Short circuit current (kA)

A: Conductor area (mm² )

T1: Operating temperature (85℃)

T2: Short circuit temperature (250℃)

t: Short circuit duration (sec)

T1 = 90, T2 = 250

Nominal

Area

Short Circuit Current(kA)

Duration of Short Circuit in Second

(mm²)

0.03

0.05

0.07

0.1

0.14

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.5

1.26

0.98

0.83

0.69

0.58

0.49

0.40

0.35

0.31

0.28

0.26

0.24

0.23

0.22

2.5

2.02

1.56

1.32

1.10

0.93

0.78

0.64

0.55

0.49

0.45

0.42

0.39

0.37

0.35

4

3.25

2.52

2.13

1.78

1.50

1.26

1.03

0.89

0.80

0.73

0.67

0.63

0.59

0.56

6

4.86

3.77

3.18

2.66

2.25

1.88

1.54

1.33

1.19

1.09

1.01

0.94

0.89

0.84

10

8.19

6.34

5.36

4.49

3.79

3.17

2.59

2.24

2.01

1.83

1.70

1.59

1.50

1.42

16

12.99

10.06

8.50

7.11

6.01

5.03

4.11

3.56

3.18

2.90

2.69

2.52

2.37

2.25

25

20.6

15.9

13.5

11.3

9.5

8.0

6.5

5.6

5.0

4.6

4.3

4.0

3.8

3.6

35

28.5

22.1

18.7

15.6

13.2

11.1

9.0

7.8

7.0

6.4

5.9

5.5

5.2

4.9

50

38.6

29.9

25.3

21.2

17.9

15.0

12.2

10.6

9.5

8.6

8.0

7.5

7.1

6.7

70

55.9

43.3

36.6

30.6

25.9

21.6

17.7

15.3

13.7

12.5

11.6

10.8

10.2

9.7

95

77.5

60.0

50.7

42.4

35.9

30.0

24.5

21.2

19.0

17.3

16.0

15.0

14.1

13.4

120

97.9

75.8

64.1

53.6

45.3

37.9

31.0

26.8

24.0

21.9

20.3

19.0

17.9

17.0

150

120.3

93.1

78.7

65.9

55.7

46.6

38.0

32.9

29.5

26.9

24.9

23.3

22.0

20.8

185

150.8

116.8

98.8

82.6

69.8

58.4

47.7

41.3

36.9

33.7

31.2

29.2

27.5

26.1

240

198.3

153.6

129.8

108.6

91.8

76.8

62.7

54.3

48.6

44.3

41.0

38.4

36.2

34.3

300

248.7

192.6

162.8

136.2

115.1

96.3

78.6

68.1

60.9

55.6

51.5

48.2

45.4

43.1

400

329.3

255.1

215.6

180.4

152.5

127.6

104.1

90.2

80.7

73.6

68.2

63.8

60.1

57.0

500

401.0

310.6

262.5

219.6

185.6

155.3

126.8

109.8

98.2

89.7

83.0

77.7

73.2

69.5