Foam PE insulation metal sheathed symmetrical communication cable

Foam PE insulation metal sheathed symmetrical communication cable application

PCM digital quads for a group (2.048Mb / s) digital communication systems, low-frequency Quads for audio communication, 0.6 line pairs for signal, alarm, telemetry, remote exploration and audio communication.

Foam PE insulation metal sheathed symmetrical communication cable model and spec

(1) 14 sets of digital transmission distance symmetrical communication cables
0.9 * 4 * 4 (number) +10 * 4 * 0.9 (low) 0.6 +5 * 2 *
(2) 17 sets of numbers symmetrical communication cable transmission distance
0.9 * 4 * 4 (number) +13 * 4 * 0.9 (low) + 4 * 4 * 0.6 (low) 2 * 0.6 +1 *

Foam PE insulation metal sheathed symmetrical communication cable features

(1) Digital Quads for PCM primary group (2048Mbit / s) digital communications system
(2) low-frequency Quads for audio communication
(3) 0.6,0.7 pair for signal, alarm, telemetry and audio communication
(4) shielding factor of ≤ 0.1
(5) applies to strong electromagnetic interference occasions

Foam PE insulation metal sheathed symmetrical communication cable electrical performance

Number	Item	Data	Conversion formula
1 1-1 1-2	Digital Quads crosstalk attenuation 103KHz dB/km Near-end crosstalk attenuation between the two groups 100% 80% The group FEXT defense degree 100% 80%	≥70 ≥75 ≥50 ≥55	-10lg(L/500)
2	Digital Quads capacitive coupling coefficient pF/500m K2 K3(0.8~1.0KHz)	≤600	L/500
3	Low-frequency capacitive coupling coefficient Quads pF/500m (0.8~1.0KHz) K1 　　 Average 　　Max K9~K12 　　 Average 　　 Max	≤82 330 ＜119 236	√L/500 L/500 √L/500 L/500
4	LF Quads ground capacitance unbalance pF/500m (0.8~1.0KHz) e1 、 e2 　 Ave Max 10% of the maximum allowed number plate	≤233 800 1294	√L/500 L/500 L/500
5	Insulation resistance core - ground MΩ.km Digital and low frequency Quads 0.6 0.7 0.6 solid line on the low-frequency Quads	≥10000 ≥5000	1000/L
6	Insulation electric strength（50Hz） V Digital Quads and Low-frequency Quads Core-Core 2min Core-Metal sheath 2min 0.6、 0.7pair - 0.6solid low frequency quads 2min Core-Metal sheath 2s	1000 1800 1000 2000	-
7	Shielding factor Longitudinal sheath induced electromotive force 30~150V/km (50Hz)	≤0.1	-

Note:100%, 80% for the cable measured group number

Foam PE insulation metal sheathed symmetrical communication cable typical construction

1.Conductor

2.Insulation

3.Tape

4.Aluminum sheath

5.Inner covering

6.Outer sheath