RelianceCorp.com

Products Ranges

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
HEYDQT03 HEYFLT03 HEYFLT23			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℃ Ω/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 Ω/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	24.4±1.6 27(L) 23.0±1.5 (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 K1 Average 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