Model: MHYAV, MHYA32, MHYV, MHYVR, MHYVRP, MHYVP, MHY32, MHJYV
Mineral flame-retardant cable, 4*2*0.5, product structure:
Conductor: Solid copper conductor (0.5mm)
Insulation: Solid polyethylene, Colors: Blue*White/Blue, Orange*White/Orange, Green*White/Green, Brown*White/Brown
Twisted Pair: Two insulated core wires are twisted together, with each pair utilizing a different twist pitch to ensure excellent near-end crosstalk (NEXT) characteristics.
Cabling: 4-pair stranded, ensuring superior near-end crosstalk (NEXT) characteristics.
Screening: Aluminum foil + copper wire braiding, braiding density ≧ 60%
Outer Sheath: Flame-retardant Blue Polyvinyl Chloride (PVC)
Coal mine flame-retardant wire installation must be strictly sealed in accordance with the process. Intermediate joints must use a metal copper shell with a PE or PVC insulating and anticorrosive layer for sealing structure, ensuring a tight lead seal during on-site construction. This effectively guarantees the sealing and waterproof performance of the joints.
Mining cable can also be customized according to customer requirements (e.g., steel tape armored,钢丝 armored).
Twisted pair cables consist of four pairs of copper conductors, each pair insulated and twisted together, encased within an insulating sheath. They reduce interference caused by noise and suppress signal attenuation within the cable. With the use of twisted pair cables, it's easy to add or remove a computer from the network without disrupting its operation, and network maintenance is relatively simple. If a cable fails, it will only affect the computer or device connected to that specific twisted pair, and won't lead to a network outage. However, the use of twisted pair cables requires the addition of a hub or switch in the network.
Code Name
Coal Mine Flame Retardant Communication Cable........................MH
Copper Core Wire
Polyethylene Insulation.......................................Y
Aluminum-polyethylene bond jacket
Polyethylene Inner Sheath
Knitted Armor..............................................B
PVC Sheath
Fine round wire armoring, polyvinyl chloride sheath...........32
Product Representation Method
Products are represented by model and specification numbers. Such as:
a) Coal mine communication cable with a polyethylene insulated aluminum conductor bonded with polyethylene sheath, steel wire armoring, and a polyvinyl chloride jacket, featuring 30 twisted cores.
MHYA3230 2
b) Coal mine communication cable with polyethylene insulated and polyvinyl chloride sheathed, having 1 star绞ed core, denoted as: MHYV1 4
Key Technical Performance and Specifications
DC Resistance of Conductor at 20℃ Ω/km: ≤45 (7/0.28), ≤73 (7/0.28, 3 steel, 4 copper), ≤36.7 (1/0.8)
Fixed Attenuation (800-1000 Hz) dB/km ≤1.1 ≤1.3 ≤0.95
Insulation resistance of cable core at 20℃: ≥3000 MΩ.km
Line-to-line working capacitance (800-1000 Hz) uF/km ≤ 0.06
Near-end crosstalk attenuation (800-1000 Hz) dB/500m ≥70
Inductance (800-1000 Hz) uH/km ≤ 800
AC industrial power frequencyNear-end crosstalk attenuation1.5KV/1min pressure test
Direct Current Resistance Difference ≤ 2% of Loop Resistance
8. Cable Usage Characteristics
The long-term allowable operating temperature for the cable conductor is -40 to +50℃.
Average monthly relative humidity ≤ 95% (+25℃)
The cable should not exceed -10℃ for installation and attachment temperature.
Cable bend radius: For MHYV and MHJYV cables, it is 10 times the cable outer diameter; for other cable types, it is 15 times the outer diameter.
