Mine communication cable: MHJYV, MHYV MHYAV, MHYA32

Product standard: MT818.14-1999

MHYV (1 × 2 2 × 2 × 4 5 × 2) × 7/0.28 coal Lane Inclined communication cable for electrical and mechanical chamber with polyethylene insulated PVC sheathed mine

MHJYV 4/0.28 copper + / 0.28 steel wire 1 × 2 2 × 2 for use in mines to strengthen the line core PE insulated PVC sheathed mine communication cable for the high mechanical damage Lane and Inclined

MHYAV 1/0.8 (20 × 2 30 × 2 50 × 2) × 0.8 coal with polyethylene insulated aluminum polyethylene bonding layer PVC sheathed mine communication cable used in the more humid and slanted

MHYA32 (30 × 2 50 × 2 80 × 2) × 0.8 coal with polyethylene insulated aluminum polyethylene bonding layer steel wire armored, PVC sheathed shaft and inclined mine communication cable for

Named code

Coal with communication cables ................................... MH

Copper wire core .............................................. omission

Polyethylene insulated ........................................... Y

Aluminum polyethylene sheath ....................................

Polyethylene jacket ......................................... omitted

Braided armored .............................................. B

PVC sheathed ........................................ V

Small round steel wire armored, PVC outer layer .......................... 32

Mine communication cable representation

Mine communication cable models, specifications, said. Such as:

a) have 30 pairs of stranded core for use in mines polyethylene insulated aluminum polyethylene bonded sheath steel wire armored, PVC sheathed mine communication cable is expressed as: MHYA32 30 × 2

b) has a core of stars stranded coal mine polyethylene insulated PVC sheathed mine communication cable, is expressed as: MHYV 1 × 4

The main technical performance indicators

Conductor DC resistance Ω, 20 ° C / 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

20 ° C 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

Mining use characteristics of the communication cable

The conductor of the long-term allowable working temperature -40 to +50 ° C;

The average maximum relative humidity ≤ 95% (+25 ° C)

Allow attached and installed the temperature should not exceed -10 ° C

The minimum bend radius: MHYV, MHJYV cable is 10 times the cable diameter, other types of cable outer diameter of 15 times.