Conductor DC resistance Ω, in the mining technical performance and indicators of communication cable 20 ° C / km 7/0.28 ≤ 45 7/0.283 steel 4 Cu ≤ 73 1/0.8 ≤ 36.7 inherent attenuation (800 ~ 1000HZ) dB / km ≤ 1.1 ≤ 1.3 ≤ 0.95 at 20 ° C core insulation of the cable insulation resistance MΩ.km ≥ 3000 line capacitor (800 ~ 1000HZ) uF / km ≤ 0.06 near-end crosstalk attenuation (800 ~ 1000HZ) dB/500m ≥ 70 inductance (800 ~ 1000HZ The)-uH / km ≤ 800 resistance to AC power frequency voltage 1.5KV/1min difference ≤ loop resistance 2 percent mining use characteristics of the communication cable conductor DC resistance of long-term allowable working temperature of -40 to +50 ° C; average maximum relative humidity ≤ 95% (+25 ° C) to allow attached and installation of temperature -10 ℃ minimum bend radius should not exceed: MHYV, MHJYV cable is 10 times the cable diameter, other types of cable outer diameter of 15 times.

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