BS 6622 Single Core Armoured 6.6kV XLPE Stranded Aluminium Conductor
Construction
Size mmsq |
Minimum Average Thickness of Insulation mm |
Nominal Area of Copper Tape Screen |
Nominal Thickness of Bedding
|
Nominal number and diameter of armoured wires no./ mm |
Nominal Thickness of Sheath mm |
Nominal Overall Diameter mm |
70 |
2.5 |
16.8 |
1.2 |
38/1.6 |
1.8 |
27.5 |
95 |
2.5 |
18.5 |
1.2 |
41/1.6 |
1.9 |
29.4 |
120 |
2.5 |
20 |
1.2 |
44/1.6 |
1.9 |
30.9 |
150 |
2.5 |
21.3 |
1.2 |
46/1.6 |
2.0 |
32.4 |
185 |
2.5 |
23.1 |
1.2 |
40/2.0 |
2.0 |
35.0 |
240 |
2.6 |
25.5 |
1.2 |
43/2.0 |
2.1 |
37.6 |
300 |
2.8 |
28.3 |
1.2 |
47/2.0 |
2.2 |
40.8 |
400 |
3 |
31.4 |
1.2 |
51/2.0 |
2.3 |
44.1 |
500 |
3.2 |
34.7 |
1.3 |
46/2.5 |
2.5 |
49.0 |
630 |
3.2 |
38.6 |
1.4 |
50/2.5 |
2.6 |
53.3 |
Installation
Size mmsq |
Approximate Cable Weight kg/m |
Nominal Drum Length |
Minimum Bending Radius mm |
Nominal Internal Diameter of Ducts mm |
70 |
1.0 |
1000 |
450 |
100 |
95 |
1.2 |
1000 |
450 |
100 |
120 |
1.3 |
1000 |
500 |
100 |
150 |
1.5 |
500 |
500 |
100 |
185 |
1.7 |
500 |
550 |
100 |
240 |
2.0 |
500 |
600 |
100 |
300 |
2.4 |
500 |
650 |
100 |
400 |
2.8 |
500 |
700 |
100 |
500 |
3.4 |
300 |
750 |
100 |
630 |
4.1 |
300 |
800 |
100 |
Electrical Performance
Size mmsq |
Maximum DC resistance of conductor at 20 ¡æ uohms/m |
Maximum AC resistance of conductor at 90 ¡æ uohms/m |
Reactance at 50Hz uohms/m |
Impedance at 50Hz uohms/m |
Maximum Capacitace PF/m |
Maximum charging current at normal voltage and frequency mA/m |
70 |
443 |
568 |
125 |
582 |
371 |
0.45 |
95 |
320 |
410 |
119 |
427 |
417 |
0.50 |
120 |
253 |
325 |
114 |
344 |
459 |
0.55 |
150 |
206 |
265 |
111 |
288 |
494 |
0.59 |
185 |
164 |
211 |
109 |
238 |
543 |
0.65 |
240 |
125 |
161 |
105 |
193 |
583 |
0.70 |
300 |
100 |
130 |
103 |
167 |
602 |
0.72 |
400 |
77.8 |
102 |
99.9 |
143 |
627 |
0.75 |
500 |
60.5 |
81.0 |
99.2 |
129 |
654 |
0.79 |
630 |
46.9 |
64.0 |
95.5 |
116 |
737 |
0.87 |
Ratings
Size |
Current Ratings |
Short circuit ratings |
|||
Laid in ground |
Drawn into ducts |
Laid in air |
One second short circuit rating of conductor |
One second short circuit rating of copper per core |
|
70 |
210 |
210 |
240 |
6.3 |
- |
95 |
250 |
245 |
295 |
8.5 |
- |
120 |
280 |
275 |
335 |
11.0 |
Typically |
150 |
315 |
300 |
380 |
13.5 |
Less |
185 |
355 |
335 |
435 |
17.0 |
Then |
240 |
405 |
380 |
510 |
22.3 |
1kA |
300 |
455 |
420 |
580 |
28.0 |
- |
400 |
510 |
455 |
670 |
36.6 |
- |
500 |
570 |
500 |
770 |
46.2 |
- |
630 |
640 |
550 |
880 |
58.3 |
- |