RelianceCorp.com

Products Ranges

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
GHYAY GHYAT53	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℃ Ω/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℃ Ω/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.