xlpe insulated cables nominal voltage testing
The main technical performance (form test):

Nominal voltage 3.6/6 (7.2) 6/6 6/10 8.7/10 8.7/15 12/20 18/20 18/30 21/35 26/35
Conductor dc resistance  
Partial discharge test(1.73U o below) not exceeding 5
Partial discharge test after the bending test (1.73U o below) not exceeding 5
The partial discharge test after thermal cycling test(1.73Uo below) Partial discharge test(1.73U o below) not exceeding 5
4 hours ac voltage test,no breakdown 14.4 24 34.8 48 72 84 104
Impulse voltage test 60 75 95 125 170 200 
15 minutes power frequency withstand voltage test 12.5 21 30.5 42 63 53 65
Crosslinked polyethylene heat extension under the test load for 15 minutes, 20 N/cm2 load elongation of the maximum elongation to load after cooling 175 15
90±5℃, the AC voltage not below 2kV, tgδ not greater than 8×10 10×10

Maximum D.C. resistance at 20 ℃ : unit: Ω /km

Nominal cross section

Copper core

Aluminum conductor

Nominal cross section

Copper core

Aluminum conductor


1.5

2.5

4

6

10

16

25

35

50

70


12.1

7.41

4.61

3.08

1.83

1.15

0.727

0.524

0.387

0.268


~

12.1

7.41

4.61

3.08

1.91

1.20

0.969

0.641

0.443


95

120

150

185

240

300

400

500

630

800


0.193

0.153

0.124

0.0991

0.0754

0.0601

0.0470

0.0366

0.0283

0.0221


0.320

0.253

0.206

0.164

0.125

0.100

0.0778

0.0605

0.0469

0.0367



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