Flame retardant mining cable

NegotiableUpdate on 12/30

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Flame retardant mining cable is a special cable designed specifically for the harsh thermal environment underground in coal mines. Its core feature is that it can effectively suppress the spread of flames in the event of short circuits or overloads, and automatically extinguish after the fire source is removed, preventing the ignition of gas and coal dust and avoiding the expansion of accidents.

Product Details

Flame retardant mining cables are the core of safe power supply in mines, and corresponding types should be selected according to specific scenarios (mobile/fixed equipment, shaft type, gas environment), and strictly comply with MA certification and national standards. Armored type is resistant to mechanical damage, rubber type is suitable for mobile equipment, and low smoke and halogen-free type ensures the safety of personnel escaping from high-risk areas.

Core features:

1. Flame retardant performance

Made of halogen-free materials, it does not release a large amount of toxic gases during combustion, effectively delaying the spread of fire and reducing smoke concentration.

Strict combustion tests (such as bundle combustion test) are required, and the flame retardant grades are divided into A, B, and C. Among them, Class A has strong flame retardancy (flame spread ≤ 1.5m).

2. Environmental resistance

Moisture and corrosion prevention: The insulation layer and sheath are made of polyethylene (PE) or cross-linked polyethylene (XLPE) to adapt to the humid and acidic environment of mines.

Mechanical strength: Armored cables (such as steel wire/strip armor) can withstand rock compression, tension, and impact, making them suitable for laying in vertical and inclined shafts.

Temperature adaptability: The working temperature range is -40 ℃~90 ℃, and the laying temperature is not lower than -10 ℃.

Main electrical performance of MHYA city communication cable:

1. DC resistance: 20 ℃, 0.4 ≤ 148, 0.5 ≤ 95.0, 0.6 ≤ 65.8, 0.8 ≤ 36.6

2. Electrical strength: No breakdown between conductors at 1kV for 1 minute and no breakdown between conductors and shields at 3kV for 1 minute.

3. Insulation resistance: Each core wire is grounded to the rest of the wire cores, with HYA cables exceeding 10000M Ω· km and HYAT cables exceeding 3000M Ω· km.

4. Working capacitance: average value of 52 ± 2nF/km 5. Far end crosstalk * degree: The average combined power at 150kHz is greater than 69dB/km.

Main technical indicators:

Number of cable cores (specification)	Cable core diameter (mm)	Insulation Z large eccentricity (mm)	Finished cable Z large outer diameter (mm)	Twisted pitch (mm)	Near end crosstalk attenuation	Far end crosstalk * degree	Remarks
MHYA5×2×0.4	0.405	0.02	8.2	31.7-119.5	All combinations of wire pairs in 10 pairs of cables (M-S) ≥ 53; All combinations (M-S) between 12 pairs and 13 pairs of units and line pairs ≥ 54 20 pairs, 30 pairs of cables, and all groups between pairs within the basic unit Combined (M-S) ≥ 58 All combinations of line pairs between adjacent subunits (M-S) ≥ 63	Any line pair combination ≥ 58 All combinations between pairs within the basic unit or within 30 pairs of cables are ≥ 69 All combinations within 12 pairs and 13 pairs of units, as well as between 10 pairs and 20 pairs of cables, are ≥ 68	The insulation structure is solid polyolefin insulation
MHYA10×2×0.4	0.405	0.02	11.5	31.7-119.5
MHYA20×2×0.4	0.405	0.02	13.5	31.7-119.5