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Power Cables |  |
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Power Cables
BS 6622 Three Core Armoured 15KV 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 |
4.5 |
19.4 |
1.5 |
56/2.5 |
2.8 |
58.8 |
70 |
4.5 |
21.2 |
1.5 |
60/2.5 |
2.9 |
62.9 |
95 |
4.5 |
22.9 |
1.6 |
65/2.5 |
3.0 |
67.0 |
120 |
4.5 |
24.4 |
1.7 |
68/2.5 |
3.1 |
70.6 |
150 |
4.5 |
25.7 |
1.7 |
71/2.5 |
3.2 |
73.6 |
185 |
4.5 |
27.5 |
1.8 |
61/3.15 |
3.4 |
79.4 |
240 |
4.5 |
29.7 |
1.9 |
65/3.15 |
3.6 |
84.7 |
300 |
4.5 |
32.0 |
2.0 |
70/3.15 |
3.7 |
90.1 |
400 |
4.5 |
34.7 |
2.1 |
75/3.15 |
4.0 |
96.7 |
Installation
cross-sectional area mmsq |
Approximate cable weight kg/m |
Nominal drum length |
Minimum bending radius mm |
Nominal internal diameter of ducts mm |
50 |
6.1 |
500 |
900 |
100 |
70 |
7.1 |
500 |
950 |
100 |
95 |
8.3 |
500 |
1050 |
125 |
120 |
9.4 |
500 |
1100 |
125 |
150 |
10.5 |
450 |
1150 |
125 |
185 |
12.9 |
400 |
1200 |
125 |
240 |
15.2 |
350 |
1300 |
125 |
300 |
17.6 |
300 |
1400 |
125 |
400 |
20.8 |
250 |
1500 |
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 |
123 |
508 |
211 |
0.58 |
70 |
268 |
343 |
115 |
361 |
240 |
0.65 |
95 |
193 |
248 |
109 |
270 |
267 |
0.73 |
120 |
153 |
196 |
105 |
223 |
291 |
0.79 |
150 |
124 |
159 |
102 |
189 |
312 |
0.85 |
185 |
99.1 |
128 |
98.6 |
162 |
340 |
0.93 |
240 |
75.4 |
98 |
95.2 |
137 |
375 |
1.02 |
300 |
60.1 |
80 |
92.2 |
123 |
411 |
1.12 |
400 |
47 |
64 |
89.3 |
110 |
454 |
1.24 |
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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