Cables :
  Polyethylene insulated and sheathed petrojelly filled, expressway
  communication cable

Applicable range

The polyethylene insulated and sheathed, petrojelly filled expressway communication cables are used for signal transmission of audio, data warning of expressway.

Standard code : Q/ZL82-1999

Type of products, specifications, name, structure size and applicable ste

Type Specifications Name Outer diameter
(mm)
Applicable site
GHYAY
GHYAT53
1x4x0.9
2x4x0.9
3x4x0.9
4x4x0.9
5x4x0.9
6x4x0.9
7x4x0.8
Polyethylene insulated and sheathed petrojelly filled expressway communication cables 15.2/19.1
16.0/18.9
17.2/21.1
18.6/22.5
20.1/24.0
20.1/24.0
Cable pit, channel
3x2x0.9
4x2x0.9
5x2x0.9
6x2x0.9
7x2x0.9
8x2x0.9
9x2x0.9
Polyethylene insulated and sheathed, petrojelly filled, expressway communication cables 12.9/16.8
13.8/17.7
14.8/18.7
15.0/18.9
15.8/19.7
Channel, cable pit
Note :
(1) Datus of cable outer diameters as shown above column are the outer diameters of GHYAT/GHYAT53 two types
(2) According to the requirement of customer, we can also manufacture the cables of others conductor diameter
No Item Index Conversion formula
1

(1)Conductor D.C resistance at 20 /km not more than
(2) D.C resistance difference of working pair not more than

28.5
1
L/1000
2 Insulation resistance at 20 /km each core to other core and metal sheath connection 5000
1000/L
3 Working pair capacity (0.8-1.0KHz) nF/km not more than 52(60) L/1000
4

Insulation electric strength V effective value 50Hz without breakdown
(1) To earth (all of cores are connected together and then earthed)
(2) Between the cores



3000

1000
5

Capacitive coupling coefficient (0.8-1.0KHz) Pf/km
(1) K1 Not more than
(2) K9-K12 Not more than


160
500
L/500
6 Capacitive unbalance to earth (0.8-1.0KHz) Pf/km
e1e2 average
maximum value

490
1700
L/500m
L/500
7 Attenuation constant dB/km
1KHz
16KHz Not more than
30KHz

0.8
1.9
2.7
L/1000

Operation requirements
  • The cable should be laid under the frozensoil, its working environment temperature is
    -60~-20, the laying environment temperature shall not be lower than -5
  • Bending radins of cable should be 25 times of diameter of cable
  • The bump or mechanical damage to the cable should be prevented during the transportation and laying
  • The cable shall prevent water and humid into when the cable jointing in installation.
  • It shall be ensured to filler continues in joint and block water of cable when the petrojelly filled in jointing.

    

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