Cables :
  Foamed polyethylene insulated, metal sheathed, long distance
  symmetrical cable

Applicable range

Copper core, foamed polyethylene insulated metal sheathed, long distance symmetrical cables are used for railway communication etc.

Digital transmission quad is used for primary group communication to switching on 4-6 sets of PCM at 1MHz.

High frequency quad is used for carrier communication of 156KHz

Low frequency quad is used for area audio communication.

Signal, pairing and signal quad are used for line maintenance and signal remote supervision system.

Standard code : Q/ZL67-92 Q/ZL68-92 Q/ZL88-1997

Kind of product :

The products are divided into two kinds that one is non-oil ointment filled cable and the other is oil ointment filled cable, either one of them, it must be based upon the site of application.

Type, specification, name and applicable site of products.

Type Specification Name Applicable site
HEYDQT03
HEYFLT03


HEYFLT23
1x4x0.9(L)
3x4x0.9(L)+3x2x0.7(S)
4x4x0.9(L)+4x2x0.7(S)
7x4x0.9(L)+6x2x2x0.6(S)
Foamed PE insulated oil ointment filled, aluminum sheathed, low frequency, long distance symmetrical cable

Foamed PE insulated, oil ointment filled, steel tape armored, long distance symmetrical cables
Overhead, channel, cable pit
As above, strong electricity interface
HEYFQ03


HEYFL03-156
3x4x0.9(L)+3x2x0.6(S)
4x4x0.9(L)+4x2x0.6(S)
7x4x0.9(L)+6x2x0.6(S)
Foamed PE insulated, lead sheathed, low frequency symmetrical cables

Foamed PE insulated, aluminum sheathed, high frequency, symmetrical cables
Overhead channel cable pit


   Cont,table

Type Specification Name Applicable Site
HEYFL23-156



HEYFL33-156


HWYFQ41-156



3x4x0.9(h)+3x2x
0.6(L)+5x1x0.6(S)


4x4x0.9(h-I)+4x4x
0.9(h-II)+9x4x
0.9(h-I)+5x4x0.6(S)

4x4x0.9(h-I)+15x4x
0.9(L-II)

Foamed PE insulated aluminum sheathed steel tape armored high frequency, long distance symmetrical cables

Foamed PE insulated, aluminum sheathed fine steel wire armored, high frequency long distance symmetrical cables

Foamed PE insulated, lead sheathed, thick steel wire armored, high frequency, long distances symmetrical cables
Cable pit strong electricity interference







HESYFL03-1000



HESYFL23-1000



HESYFQ23-1000
4x4x0.9(S)+10x4x
0.9(L)+5x2x0.7(S)

6x4x0.9(S)+13x4x
0.9(L)+10x2x0.7(S)
Foamed PE insulated, aluminum sheathed, digital transmission. long distance, symmetrical cables

Foamed PE insulated, aluminum sheathed. steel tape armored, digital transmission, long distance, symmetrical cables

Foamed PE insulated, lead sheathed, thick steel wire armored, digital transmission, long distance symmetrical cables.
Cable pit strong electricity interference under water.

Electrical performance
NO Item Index conversion formula
1 Conductor D.C resistance at 20 /km not more than
Working pair D.C resistance difference not move than
28.5
1%(1.0%)
L/1000
2 Insulation resistance at 20 M /km
each core to the other  core and metal connection for quad not less than Quad

10000
5000
1000/L
3 Working capacity (0.8-1.0KHz) nF/1000
Quad 0.9mm nor more than
Type I
Type II
Pair 0.70
nominal
Maximum


24.41.6 27(L)
23.01.5 (26L)

44
55
L/1000
4

Dielectric strength V effective value 50Hz not beakdown
(1) To earth (all of cores are connected together and then to earth)
(2)Between the cores


1800

1000
5 Capacitive coupling coefficient
(1) High frequency quad K2K3   not more than
(2) Low frequency quad KAverage value
maximum value
Average value
maximum value

600
82
330
118
236

L/500m
L/500m
L/500m
L/500m
L/500m
6  To earth capacity imbalance coefficient (0.8-1.0KHz) Pf/500m
e1e2 Average value
Maximum value

233

1294
L/500m

L/500m
7

dB/500m Crosstalk dB/500m
(1) Near-end crosstalk attenuation
    inside quad
    156KHz Between quad
    1MHz 10%
    70% (between near-end crosstalk attenuation
     opposing)
    100%
(2) Defensive degree of farend-crosstalk
    inside quad
    156KHz between quads
    Permissible central 4 quads have 3 datum, 3 quads
    have 2 datum not less than
    1MHz 80% not less than
          100% not less than


60
65
80
75

70

70
76
71


50
55
      L
-10lg ------
       500M

  L
(In-------)
  500m

      L
-10lg ------
       500M

  L
(In-------)
  500m
8

20 dB/km
156KHz Type I nominal
                     tolerance
           Type II nominal
                     tolerance
  1KHz Type I
          Type II


2.65
0.2
2.6
0.2
6.8
6.0
L/1000
9 Screening coefficient
50Hz 30-150V/km
Longitudinal electrodynamic potential sheath
0.1


Applicable requirement
  • Cable must be laid under the frozen ground. Its operating ambient temperature are +60~20. Laying temperature is lower than -5.
  • Bending radius of cable is 30 times of metal sheath 25 times of outer diameter of cable
  • It must be prevented from mechanical damage to the cables during transportation and laying (such as squash, turn over and heavy press etc.)
  • It must be prevented the moisture and water permeated during jointing, end stripping and laying and prevented that cable core insulated layer is burned when joining ealing.
  • Cable must be pressurized maintenance by filling dry air or nutrigen with a pressure of 5-20N/ for lead sheathed cable.
  • When oil ointment filled cable is jointing, it must be proved to keep the filling material continuously and water resistant performance of cables

    

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1304, Kumkwang Benesta,1149-2, Jung-Dong, Wonmi-Gu,
Bucheon-city, Gyeonggi-do 420-020, KOREA