BS 6622 Three Core Armoured 11kV XLPE Stranded Aluminium Conductors
Construction
cross-sectional area mmsq |
Minimum average thickness of insulation mm |
Nominal
diameter over insulation
|
Nominal thickness of PVC bedding
mm |
Nominal number and diameter of armoured wires no./mm |
Nominal thickness of PVC oversheath mm |
Nominal overall diameter of cable mm |
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 m |
Minimum bending radius mm |
Nominal internal diameter of ducts mm |
70 |
5.1 |
500 |
700 |
100 |
95 |
5.7 |
500 |
750 |
100 |
120 |
6.4 |
500 |
800 |
100 |
150 |
6.9 |
500 |
850 |
125 |
185 |
7.3 |
500 |
900 |
125 |
240 |
9.7 |
500 |
950 |
125 |
300 |
10.9 |
450 |
1050 |
125 |
400 |
12.5 |
400 |
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 uohms/m |
Impedance at 50Hz uohms/m |
Maximum Capacitace PF/m |
Maximum charging current at normal voltage and frequency mA/m |
70 |
443 |
568 |
108 |
578 |
298 |
0.62 |
95 |
320 |
410 |
102 |
422 |
334 |
0.67 |
120 |
253 |
325 |
98.8 |
340 |
365 |
0.73 |
150 |
206 |
265 |
96.2 |
282 |
392 |
0.78 |
185 |
164 |
211 |
93.1 |
231 |
430 |
0.86 |
240 |
125 |
161 |
90.0 |
184 |
476 |
0.95 |
300 |
100 |
130 |
87.4 |
157 |
524 |
1.05 |
400 |
77.8 |
102 |
84.9 |
133 |
580 |
1.16 |
Ratings
Cross-sectional area
mmsq |
Current Ratings |
Short circuit ratings |
|||
Laid direct in ground
Amps |
Drawn into ducts
Amps |
Laid in air
Amps |
One second short circuit rating of conductor
KA |
One second short circuit rating of copper per core
KA |
|
70 |
195 |
165 |
210 |
6.3 |
Typically less than 1kA |
95 |
230 |
200 |
250 |
8.5 |
|
120 |
265 |
225 |
295 |
11.0 |
|
150 |
295 |
255 |
330 |
13.5 |
|
185 |
335 |
290 |
385 |
17.0 |
|
240 |
380 |
335 |
450 |
22.3 |
|
300 |
435 |
375 |
510 |
28.0 |
|
400 |
480 |
420 |
570 |
36.6 |