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Power Cables |  |
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Power Cables
BS 6622 Three Core Armoured 11kV XLPE Stranded Copper Conductors
Construction
cross-sectional area mmsq |
Minimum average thickness of insulation mm |
Nominal diameter over insulation
|
Nominal thickness of PVC bedding |
Nominal number and diameter of armoured wires no./mm |
Nominal thickness of PVC oversheath |
Nominal overall diameter of cable mm |
50 |
3.4 |
17.0 |
1.4 |
50/2.5 |
2.6 |
53.1 |
70 |
3.4 |
18.8 |
1.4 |
54/2.5 |
2.7 |
57.1 |
95 |
3.4 |
20.5 |
1.5 |
59/2.5 |
2.8 |
61.2 |
120 |
3.4 |
22.0 |
1.6 |
62/2.5 |
3.0 |
65.0 |
150 |
3.4 |
23.3 |
1.6 |
65/2.5 |
3.1 |
68.0 |
185 |
3.4 |
25.1 |
1.7 |
70/2.5 |
3.2 |
72.3 |
240 |
3.4 |
27.3 |
1.8 |
61/3.15 |
3.4 |
79.0 |
300 |
3.4 |
29.6 |
1.9 |
65/3.15 |
3.6 |
84.5 |
400 |
3.4 |
32.3 |
2.0 |
70/3.15 |
3.8 |
90.9 |
Installation
cross-sectional area mmsq |
Approximate cable weight kg/m |
Nominal drum length |
Minimum bending radius mm |
Nominal internal diameter of ducts mm |
50 |
5.5 |
750 |
650 |
100 |
70 |
6.4 |
500 |
700 |
100 |
95 |
7.5 |
500 |
750 |
100 |
120 |
8.6 |
500 |
800 |
100 |
150 |
9.6 |
450 |
850 |
125 |
185 |
11.2 |
450 |
900 |
125 |
240 |
14.2 |
450 |
950 |
125 |
300 |
16.5 |
350 |
1050 |
125 |
400 |
19.7 |
300 |
1100 |
125 |
Electrical Performance
cross-sectional area mmsq |
Maximum DC resistance of conductor at 20 ℃ uohms/m |
Maximum AC resistance of conductor at 90 ℃ uohms/m |
Reactance at 50Hz |
Impedance at 50Hz uohms/m |
Maximum Capacitace PF/m |
Maximum charging current at normal voltage and frequency mA/m |
50 |
387 |
494 |
115 |
506 |
260 |
0.52 |
70 |
268 |
343 |
108 |
360 |
298 |
0.60 |
95 |
193 |
248 |
102 |
268 |
334 |
0.67 |
120 |
153 |
196 |
98.8 |
220 |
365 |
0.73 |
150 |
124 |
159 |
96.2 |
186 |
392 |
0.78 |
185 |
99.1 |
128 |
93.1 |
158 |
430 |
0.86 |
240 |
75.4 |
98 |
90.0 |
134 |
476 |
0.95 |
300 |
60.1 |
80 |
87.4 |
119 |
524 |
1.05 |
400 |
47.0 |
64 |
84.9 |
106 |
580 |
1.16 |
Ratings
Cross-sectional area |
Current Ratings |
Short circuit ratings |
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Laid direct in ground |
Drawn into ducts |
Laid in air |
One second short circuit rating of conductor |
One second short circuit rating of copper per core |
|
50 |
210 |
180 |
220 |
6.8 |
Typically less then 1kA |
70 |
255 |
215 |
270 |
9.8 |
|
95 |
300 |
255 |
330 |
13.3 |
|
120 |
340 |
290 |
375 |
17.2 |
|
150 |
380 |
330 |
430 |
21.2 |
|
185 |
430 |
370 |
490 |
26.6 |
|
240 |
490 |
425 |
570 |
34.9 |
|
300 |
540 |
470 |
650 |
43.8 |
|
400 |
590 |
520 |
700 |
57.3 |
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