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Power Cables |  |
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Power Cables
BS 6622 Three Core Armoured 6.6kV XLPE Stranded Copper Conductors
Construction
cross-sectional area mmsq |
Minimum average thickness of insulation mm |
Nominal area of copper tape screen mmsq |
Nominal thickness of PVC bedding
|
Nominal number and diameter of armoured wires no./ mm |
Nominal thickness of PVC oversheath mm |
Nominal overall diameter of cable mm |
50 |
2.5 |
15.0 |
1.3 |
45/2.5 |
2.5 |
48.4 |
70 |
2.5 |
16.8 |
1.3 |
49/2.5 |
2.6 |
52.4 |
95 |
2.5 |
18.5 |
1.4 |
54/2.5 |
2.7 |
56.5 |
120 |
2.5 |
20.0 |
1.5 |
57/2.5 |
2.8 |
60.1 |
150 |
2.5 |
21.3 |
1.5 |
60/2.5 |
2.9 |
63.1 |
185 |
2.5 |
23.1 |
1.6 |
65/2.5 |
3 |
67.4 |
240 |
2.6 |
25.5 |
1.7 |
71/2.5 |
3.2 |
73.2 |
300 |
2.8 |
28.3 |
1.8 |
62/3.15 |
3.5 |
81.3 |
400 |
3.0 |
31.4 |
2.0 |
69/3.15 |
3.7 |
88.8 |
Installation
cross-sectional area mmsq |
Approximate cable weight kg/m |
Nominal drum length |
Minimum bending radius mm |
Nominal internal diameter of ducts mm |
50 |
4.9 |
750 |
600 |
100 |
70 |
5.8 |
750 |
650 |
100 |
95 |
6.9 |
500 |
700 |
100 |
120 |
7.9 |
500 |
750 |
100 |
150 |
8.9 |
500 |
800 |
125 |
185 |
10.4 |
450 |
850 |
125 |
240 |
12.7 |
400 |
900 |
125 |
300 |
16.0 |
400 |
1000 |
125 |
400 |
19.4 |
350 |
1100 |
- |
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 |
108 |
506 |
332 |
0.40 |
70 |
268 |
343 |
102 |
358 |
383 |
0.46 |
95 |
193 |
248 |
96.2 |
266 |
432 |
0.52 |
120 |
153 |
196 |
93.1 |
217 |
474 |
0.57 |
150 |
124 |
159 |
90.8 |
183 |
511 |
0.61 |
185 |
99.1 |
128 |
88.1 |
155 |
562 |
0.67 |
240 |
75.4 |
98 |
85.9 |
130 |
602 |
0.72 |
300 |
60.1 |
80 |
84.7 |
117 |
622 |
0.75 |
400 |
47.0 |
64 |
83.2 |
105 |
648 |
0.78 |
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
|
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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