Umbilical
  
Description

Umbilical with zero buoyancy has 4 power conductors, 1 coaxial conductor and 1 twisted pair. 

It is lightweighted (no more than 94kg/km) and  has high strength (breaking strength is not less than 2kN).

Umbilical is used in diving video recording systems for power supply to underwater camera, light and for video transmission to on-board unit.

 

 

Name

  Material, dimensions                Diameter, mm                         

1                                             

Load-carrying element                               

ARMOS thread, 35х58,8                                                              2,1                                  

2

Power conductor

Copper, 7×0,31 (0,5 mm²)           0.9

3

Power conductor's insulation

Copolimer of propylene 02015-302 KM, D=0,6mm            2,1

4

Twisted pair 

Soft copper MM 7×0,15 (0,12mm²)           0,45

5

Twisted pair isolation

Copolimer of propylene 02015-302 KM, D=0,25mm            0,95

6

Twisted pair jacket

Ultrathene           2,1

7

Coaxial conductor

Soft copper MM 7×0,063           0,2
8 Coaxial insulation Copolimer of propylene 02015-302 KM, D=0,25mm            1,0

9

Coaxial screen

Cross-braiding 48×0,08 mm           1,32
10 Coaxial jacket Copolimer of propylene 02015-302 KM, D=0,4mm            2,1
11 Intermediate jacket D=1,5           9,0
12 Jacket d=1,1           11,0

Specifications

 

Electrical

 

Electrical resistance of power conductors

no more than 40,5 Ohm/km 

Insulation resistance of power conductor

not less than 1000 MOhm/km 

Electrical resistance of twisted pair conductor

no more than 170 Ohm/km 

Insulation resistance of  twisted pair  conductor

not less than 100 MOhm/km 

Impedance of twisted pair /1MHz

120 +/-5% Ohm

Attenuation factor of twisted pair/1 MHz

no more than 20 db/km

Electrical resistance of coaxial  central element

 860 Ohm/km

Electrical resistance of coaxial screen

80 Ohm/km

Impedance of coaxial  75 Ohm

Attenuation factor of coaxial/100 MHz

no more than 0,52 db/m

 

Mechanical

Breaking strength

not less than 2 kN

Umbilical's weight

nj more than 94 kg/km

Rated floatage

0 +/-2 %