Retardant communication cable MHYVP coal MHYVP coal the details of the flame retardant communication cables: mine communication cable: MHYV MHYAV MHYA32 product standard: MT818.14-1999 MHYV (1 × 2 2 × 2 1 × 4 5 × 2) × 7/0.28 coal mine polyethylene insulated PVC sheathed mine communication cable is used to drift Inclined the the electromechanical chamber MHJYV 4/0.28 copper + / 0.28 steel wire 1 × 2 2 × 2 for use in mines to strengthen the line core PVC insulated PVC sheathed for mechanical damage higher drift and Inclined MHYAV 1/0.8 (20 × 30 × 2 50 × 2) × 0.8 coal mine communication cable insulated aluminum polyethylene bonded layer PVC jacket mine communication cable is used to wet and slanted MHYA32 (30 × 50 × 2 80 × 2) × 0.8 coal with polyethylene insulated aluminum polyethylene bonding layer wire armored, PVC sheath mine communication cable for the shaft and inclined naming code for use in mines communication cables ............................ ... MH copper wire core .......................................... .... omitted polyethylene insulation .......................................... Y-aluminum-polyethylene sheath ................................. A polyethylene jacket ......................................... omitted braided armored ... ........................................... B PVC sheathed. .............................. V small round steel wire armored equipment, PVC outer Layer .......................... 32 Mine communication cable to the method of mining communications cable models, specifications, said. Such as: a) 30 pairs stranded core for use in mines polyethylene insulated aluminum polyethylene bonded sheath steel wire armored, PVC sheathed mine communication cable, said: MHYA32 30 × 2 b) has a star stranded core of the coal with polyethylene insulated PVC sheathed mine communication cable, and is expressed as: Conductor DC resistance Ω, 1 × 4 mine MHYV technical performance and indicators of communication cable 20 ° C / km 7/0.28 ≤ 45 7 / 0.28 (3 Steel 4 copper) ≤ 73 1/0.8 ≤ 36.7 inherent attenuation (800 ~ 1000HZ) dB / km ≤ 1.1 ≤ 1.3 ≤ 0.95 20 ° C, insulation resistance of cable insulation wire core MΩ.km ≥ 3000 line of work capacitance ( 800 ~ 1000HZ) uF / km ≤ 0.06 near-end crosstalk attenuation (800 ~ 1000HZ) dB/500m ≥ 70 inductance (800 1000HZ)-uH / km ≤ 800 resistance to AC power frequency voltage 1.5KV/1min DC resistance difference ≤ ring 2% of the use of resistance features conductor 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.