    
Hight voltage
cables with insulation of cross-linked polyethylene
HIGH VOLTAGE CABLES XHE 48 (-A)
110 kV
CONSTRUCTION CHARACTERISTICS OF CABLES XHE 48 (-A) 110 kV
| CONDUCTOR AREA |
mm2 |
300 |
400 |
500 |
630 |
800 |
1000 |
| Conductor diameter |
mm |
20.9 |
23.9 |
26.9 |
29.8 |
33.9 |
38.3 |
| Conductor screen thickness |
mm |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
| Insulation thickness |
mm |
18.0 |
18.0 |
18.0 |
18.0 |
18.0 |
18.0 |
| Diameter over insulation |
mm |
59.9 |
62.9 |
65.9 |
68.8 |
72.9 |
77.3 |
| Insulation screen thickness |
mm |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
| Metallic screen area |
mm2 |
50 |
50 |
70 |
70 |
95 |
95 |
| Outer sheath thickness |
mm |
3.3 |
3.4 |
3.5 |
3.6 |
3.7 |
3.9 |
| Cable diameter (approx.) |
mm |
72 |
75 |
79 |
82 |
86 |
91 |
| Conductor weight: |
|
|
|
|
|
|
|
| Cable XHE 48 |
kg/km |
2760 |
3530 |
4450 |
5745 |
7350 |
*** |
| Cable XHE 48 - A |
kg/km |
840 |
1075 |
1355 |
1750 |
2235 |
2820 |
| Cable weight: |
|
|
|
|
|
|
|
| Cable XHE 48 |
kg/km |
6765 |
7790 |
9130 |
10675 |
12870 |
*** |
| Cable XHE 48 - A |
kg/km |
4845 |
5335 |
6035 |
6675 |
7760 |
8740 |
ELECTRICAL CHARACTERISTICS OF CABLES XHE 48 (-A) 110 kV
| Conductor
resistance at 20°C (DC) |
| Cable XHE 48 |
ohm/km |
0.060 |
0.047 |
0.037 |
0.028 |
0.022 |
*** |
| Cable XHE 48 - A |
ohm/km |
0.100 |
0.078 |
0.061 |
0.047 |
0.037 |
0.029 |
| Conductor
resistance at 90°C (AC) |
| - Trefoil
formation |
| Cable XHE 48 |
ohm/km |
0.078 |
0.062 |
0.049 |
0.039 |
0.032 |
*** |
| Cable XHE 48 -A |
ohm/km |
0.129 |
0.101 |
0.079 |
0.062 |
0.050 |
0.041 |
| - Flat formation
(*) |
| Cable XHE 48 |
ohm/km |
0.078 |
0.061 |
0.049 |
0.039 |
0.031 |
*** |
| Cable XHE 48 - A |
ohm/km |
0.129 |
0.101 |
0.079 |
0.062 |
0.049 |
0.040 |
| Capacitance of cable |
nF/km |
139 |
150 |
162 |
172 |
187 |
203 |
| Inductance of cable |
mH/km |
0.452 |
0.433 |
0.418 |
0.405 |
0.390 |
0.375 |
| Dmect impedance of
cable |
| Cable XHE 48 |
ohmlkm |
0.157 |
0.145 |
0.136 |
0.129 |
0.122 |
*** |
| Cable XHE 48 - A |
ohm/km |
0.188 |
0.165 |
0.149 |
0.137 |
0.128 |
0.121 |
| 2ero impedance of
cable |
| Cable XHE 48 |
ohm/km |
0.484 |
0.467 |
0.342 |
0.331 |
0.250 |
*** |
| Cable XHE 48 - A |
ohm/km |
0.535 |
0.506 |
0.371 |
0.354 |
0.267 |
0.257 |
| Maximum electnc stress |
kV/mm |
5.8 |
5.6 |
5.4 |
5.3 |
5.1 |
4.9 |
| Earth fault
current |
| Cable XHE 48 |
A/km |
240 |
254 |
313 |
326 |
388 |
*** |
| Cable XHE 48 - A |
A/km |
211 |
230 |
287 |
305 |
367 |
385 |
| Charging current |
A/km |
2.8 |
3.0 |
3.2 |
3.5 |
3.8 |
4.1 |
| Short-circuit
current (1 sec): |
| - Conductor |
| Cable XHE 48 |
kA |
43.4 |
57.8 |
72.2 |
90.9 |
115.3 |
*** |
| Cable XHE 48 - A |
kA |
28.8 |
38.3 |
47.8 |
60.2 |
76.4 |
95.3 |
| - Metallic screen |
kA |
7.7 |
7.7 |
10.6 |
10.6 |
14.3 |
14.3 |
| Current carryng
capacity: |
| Cables in ground |
| - Trefoil
formation |
| Cable XHE 48 |
A |
570 |
645 |
715 |
800 |
855 |
*** |
| Cable XHE 48 - A |
A |
450 |
515 |
575 |
650 |
720 |
790 |
| - Flat formation
(*) |
| Cable XHE 48 |
A |
555 |
615 |
650 |
705 |
715 |
*** |
| Cable XHE 48 - A |
A |
450 |
505 |
550 |
605 |
635 |
685 |
| Cables in air |
| - Trefoil
formation |
| Cable XHE 48 |
A |
775 |
895 |
1015 |
1150 |
1270 |
*** |
| Cable XHE 48 - A |
A |
605 |
705 |
810 |
930 |
1055 |
1185 |
| - Flat formation (**) |
|
|
|
|
|
|
|
| Cable XHE 48 |
A |
780 |
900 |
1010 |
1140 |
1245 |
*** |
| Cable XHE 48 - A |
A |
615 |
715 |
815 |
930 |
1040 |
1165 |
(*) Distance between cables is equal to cable diameter.
(**) Cables are touching.
(***)1000 mm2 is produced only with Aluminium conductor.
|
