Coal mining communication cable 1.standard : MT818.14-1999 2.operating temperature -40 to +50C 3.PVC insulated

Coal mining communication cable , Colliery communication cable

1. MHYV32 30 × 2 30 pairs stranded core coal insulated steel wire armored, PVC sheathed communication cables

2. MHYV 1 × 4

Has a star stranded core of the coal mine polyethylene insulated PVC sheathed communication cables

Coal mines with the main technical performance indicators of the communication cable

Conductor DC resistance Ω, 20C / km

7/0.28 ≤ 45

7/0.28 (3 Steel 4 Cu) ≤ 73

1/0.8 ≤ 36.7

Intrinsic attenuation (800 1000HZ) dB / km ≤ 1.1 ≤ 1.3 ≤ 0.95 20C core insulation of the cable insulation to resistance MΩ.km ≥ 3000 Line capacitor (800 ~ 1000HZ) uF / km ≤ 0.06 Near-end crosstalk attenuation (800 ~ 1000HZ) dB/500m ≥ 70 Inductance (800 1000HZ)-uH / km ≤ 800 AC power frequency resistance voltage 1.5KV/1min by DC resistance difference of 2% of ≤ loop resistance

Coal with the use of characteristics of the communication cable

The cable conductor to allow the operating temperature -40 to +50 ° C; Monthly mean maximum relative humidity ≤ 95% (+25 ° C) Cable to allow attached and installation of temperature should not exceed -10 ° C Cable minimum bending radius: MHYV32, MHJYV cable is 10 times the cable diameter, other types of cable outer diameter of 15 times.

coal mining communication cable