TV COAXIAL CABLE
UNDERGROUND LAYING DISTRIBUTION CABLE
|
CONDUCTOR |
DIELECTRIC |
SCREEN |
SHEATH |
ELECTRICAL PROPERTIES |
ATTENUATIONS |
STRUCTURAL RETURN |
SCREENING |
WEIGHT |
|||||||||||||||||||||||||||
|
IMPEDANCE |
VELOCITY |
CAPACITANCE |
dB/100 m. ( 20 °C ) |
LOSS dB |
EFFECTIVENESS |
COPPER |
ALU |
TOTAL |
|||||||||||||||||||||||||||
|
TYPE |
ø MM |
TYPE |
ø MM |
TYPE |
COVER. |
TYPE |
COVER. |
TYPE |
ø MM |
RATIO |
50 |
470 |
862 |
1750 |
2150 |
2400 |
3000 |
30 ÷ 470 |
470 ÷ 862 |
862 ÷ 2150 |
2150 ÷ 3000 |
5 ÷ 30 |
30÷ 1000 |
1000÷ 2000 |
2000 ÷ 3000 |
KG./KM. | |||||||||
|
Ω |
% |
pF/m |
MHz |
MHz |
MHz |
||||||||||||||||||||||||||||||
|
CU |
1,13 |
PEG |
4,80 |
LTA |
100% |
ALL |
83% |
PE |
7,60 |
75 |
84% |
53 |
3,7 |
12,0 |
16,7 |
25,3 |
28,5 |
30,5 |
35,0 |
>31 |
>30 |
>27 |
>25 |
<5 |
>95 |
>90 |
>80 |
9,0 |
6,5 |
44,0 |
|||||
|
CU |
1,13 |
PEG+PE |
4,80 |
LAS |
100% |
CS |
73% |
PE |
7,60 |
75 |
84% |
53 |
3,7 |
12,0 |
16,7 |
25,3 |
28,5 |
30,5 |
35,0 |
>31 |
>30 |
>27 |
>25 |
<5 |
>95 |
>90 |
>80 |
20,1 |
- |
51,0 |
|||||
|
CU |
1,65 |
PEG |
7,20 |
LTA |
100% |
ALL |
73% |
PE |
10,10 |
75 |
84% |
53 |
2,8 |
8,6 |
11,9 |
17,8 |
19,5 |
20,4 |
23,5 |
>31 |
>26 |
>23 |
>20 |
<5 |
>95 |
>90 |
>80 |
19,2 |
7,8 |
73,6 |
|||||
|
CU |
1,65 |
PEG |
7,20 |
LAS |
100% |
CS |
67% |
PE |
10,10 |
75 |
84% |
53 |
2,8 |
8,6 |
11,9 |
17,8 |
19,5 |
20,4 |
23,5 |
>31 |
>26 |
>23 |
>20 |
<10 |
>95 |
>80 |
>70 |
40,2 |
- |
90,1 |
|||||
|
CU |
1,65 |
PEG |
7,20 |
LRP |
100% |
CU |
62% |
PE |
10,40 |
75 |
84% |
53 |
2,8 |
8,6 |
11,9 |
17,8 |
19,5 |
20,4 |
23,5 |
>31 |
>26 |
>23 |
>20 |
<5 |
>85 |
>75 |
>65 |
40,4 |
- |
92,8 |
|||||
Legend
|
CU |
Plain copper |
LAS |
Aluminium+polyester+aluminium adhesive tape |
|
CS |
Tinned copper |
LRP |
Copper+polyester tape |
|
ALL |
Aluminium |
PE |
Carbon black polyethylene |
| LTA | Aluminium+polyester+aluminium tape |