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Coaxial cables

Description

A screened conductor is the main feature of these cables. The screen provides good protection from external electromagnetic interference. Therefore, the cable ensures high speed and quality of data transmission over long distances and operation with television equipment. The main characteristic of coaxial cable is the impedance.

The common part in the design of these cables is load carrying element- two windings of steel armor.

Fig. 1 Typial design of coaxial load carrying cable

1- copper current conductor

2- insulation of conductor

3- screen

4- sheath

5.6 armour

The cables have different versions of screen:

a) winded flat copper tapes;

b) copper wire and polyester fiber braid;

c) braids of thin copper wires.


Specifications

Table 1 Mechanical properties of load carrying armored coaxial cables

Type of cable

Breaking strength

Design of armor

Inner/outside

Elongation

Max.operating temperature

Outer diameter of cable

Weight in air

Weight in fresh water

kN

nd(mm) / nd(mm)

m/km/kn

o

mm

kg/km

kg/km

KG10,2-30-150

30

120,85/180,85

0,52

90

6,25

156

126

G10,35-50-150

50

121,2/181,2

0,30

90

8,7

310

251

G10,5-55-150

55

151,1/181,3

0,22

90

9,3

353

285

G11,0-55-150

55

181,1/241,1

0,22

90

10,25

391

308

G11,5-55-150

55

181,1/241,2

0,22

90

10,25

395

312

G12,0-70-150

70

240,95/241,2

0,18

90

11,4

453

351

GP 1-150

150

241,35/241,75

0,10

90

16,5

921

707

GP 1-190

190

281,55/341,55

0,10

90

20,0

1226

912

Table 2 Electrical specifications of load carrying armored coaxial cables

Type of cable

Section of central conductor

Resistance of central conductor not over

Section of screened conductor

Resistance of screened conductor not over

Resistance of insulation not less

Impedance notless

Attenuation ratio not over*

2

Ohm/km

mm2

Ohm/km

hm*km

hm

Db

KG10,2-30-150

0,20

89,1

0,20

113,1

5000

35

65,0

G10,35-50-150

0,35

57,0

0,35

59,5

5000

40

42,5

G10,5-55-150

0,50

40,5

0,50

39,0

5000

40

38,0

G11,0-55-150

1,0

19,8

1,5

11,6

10000

40

27,5

G11,5-55-150

1,5

13,2

1,5

11,6

10000

30

29,5

G12,0-70-150

2,0

9,97

2,0

9,97

10000

40

19,2

GP 1-150

2,0

9,97

3,5

6,50

20000

50

15,5

GP 1-190

4,0

4,89

4,0

4,89

20000

50

14,0

* Attenuation ratio is for frequency 5 MHz




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