Name: Flame-Retardant Power Cables for Coal Mines
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Flame-Retardant Power Cables for Coal Mines

This product is a flame-retardant power cable with a copper conductor, rated for voltages of 10 kV and below, designed for fixed installation in coal mines. It is suitable for use in low- and medium-voltage power transmission and distribution systems.

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Product Description

PVC-insulated power cables for coal mines comply with the MT/T 818.12 standard.

XLPE-insulated power cables for coal mines comply with the MT/T 818.13 standard.

(1) PVC-Insulated, Flame-Retardant Power Cables for Coal Mines: Models, Names, and Scope of Application

Model	Full Name	Application Scenarios
MVV	PVC Insulated PVC Sheathed Power Cable for Coal Mines	Suitable for installation indoors, in tunnels, cable trenches, ducts, flammable and severely corrosive areas; not resistant to mechanical external forces.
MVV22	PVC Insulated Steel Tape Armored PVC Sheathed Power Cable for Coal Mines	Suitable for installation indoors, in tunnels, cable trenches, ducts, flammable and severely corrosive areas; can withstand certain mechanical external forces, but not tensile force.

(2) Types, Names, and Application Scopes of Cross-linked Polyethylene-Insulated, Flame-Retardant Power Cables for Coal Mines

Model	Full Name	Application Scope
MYJV	XLPE Insulated PVC Sheathed Power Cable for Coal Mines	Suitable for installation indoors, in tunnels, cable trenches, overhead and underground; not resistant to mechanical pressure or tensile force.
MYJV22	XLPE Insulated Steel Tape Armored PVC Sheathed Power Cable for Coal Mines	Suitable for installation indoors, in tunnels, cable trenches, overhead and underground; not resistant to mechanical pressure or tensile force.
MYJV32	XLPE Insulated Fine Steel Wire Armored PVC Sheathed Power Cable for Coal Mines	Suitable for installation in high-drop areas and vertical shafts; not resistant to large tensile force.
MYJV42	XLPE Insulated Thick Steel Wire Armored PVC Sheathed Power Cable for Coal Mines	Suitable for installation in high-drop areas and vertical shafts; resistant to large tensile force.

Rated Nominal Cross-Sectional Area and Number of Cores of Cables

(1) PVC-Insulated, Flame-Retardant Power Cables for Coal Mines

Model	Core Configuration	Rated Voltage (kV)	Nominal Cross Section (mm²)
		0.6/1
		1.8/3
MVV / MVV22	3	0.6/1	1.5 ~ 300
MVV / MVV22	3	1.8/3	10 ~ 300
MVV / MVV22	3+1	0.6/1	2.5 ~ 300
MVV / MVV22	3+1	1.8/3	10 ~ 300
MVV / MVV22	4	0.6/1	4 ~ 185
MVV / MVV22	4	1.8/3	4 ~ 185

(2) Cross-linked Polyethylene Insulated, Flame-retardant Power Cables for Coal Mines

Model	Core Configuration	Rated Voltage (kV)	Nominal Conductor Cross Section (mm²)
		0.6/1
		1.8/3
		3.6/6, 6/6, 6/10, 7.8/10
MYJV	3	0.6/1	1.5 ~ 300
MYJV22	3	0.6/1	2.5 ~ 300
MYJV32	3	0.6/1	16 ~ 300
MYJV42	3	0.6/1	50 ~ 300
MYJV	3	1.8/3	10 ~ 300
MYJV22	3	1.8/3	10 ~ 300
MYJV32	3	1.8/3	16 ~ 300
MYJV42	3	1.8/3	50 ~ 300
MYJV	3	3.6/6, 6/6, 6/10, 7.8/10	25 ~ 300
MYJV22	3	3.6/6, 6/6, 6/10, 7.8/10	25 ~ 300
MYJV32	3	3.6/6, 6/6, 6/10, 7.8/10	25 ~ 300
MYJV42	3	3.6/6, 6/6, 6/10, 7.8/10	50 ~ 300
MYJV	3+1	0.6/1	4 ~ 300
MYJV22	3+1	0.6/1	4 ~ 300
MYJV	3+1	1.8/3	10 ~ 300
MYJV22	3+1	1.8/3	10 ~ 300
MYJV	3+1	3.6/6, 6/6, 6/10, 7.8/10	-
MYJV22	3+1	3.6/6, 6/6, 6/10, 7.8/10	-
MYJV32	4	0.6/1	4 ~ 185
MYJV42	4	0.6/1	4 ~ 185
MYJV32	4	1.8/3	4 ~ 185
MYJV42	4	1.8/3	4 ~ 185
MYJV32	4	3.6/6, 6/6, 6/10, 7.8/10	-
MYJV42	4	3.6/6, 6/6, 6/10, 7.8/10	-

1. Operating Characteristics

(1) The maximum rated temperature of the conductor for PVC-insulated cables is 70°C. The maximum rated temperature of the conductor for XLPE-insulated cables is 90°C.

(2) During a short circuit (with a maximum duration not exceeding 5 seconds), the maximum conductor temperature shall not exceed 160°C for PVC insulation, and shall not exceed 250°C for XLPE insulation.

(3) If the ambient temperature during cable installation is below 0°C, the cable must be preheated.

(4) Permissible bending radius: ≥ 15D for three-core cables; ≥ 20D for single-core cables (where D is the outer diameter of the cable).

2. Main Electrical Characteristics

No.	Test Item	Sub-item	0.6/1 kV	1.8/3 kV	3.6/6 kV XLPE	6/10 kV XLPE	8.7/10 kV
1	Conductor DC Resistance (Ω/km)	—	multicolumn{5}{c}{Shall comply with the provisions of GB/T 3956-2008, see the table below}
2	Routine Partial Discharge Test	Applied Voltage (kV)	—	—	5.4	9	13
2		Test Sensitivity ≤ (pC)	—	—	10	10	10
3	Routine AC Withstand Voltage Test	Test Voltage (kV)	3.5	6.5	12.5	21	30.5
3		Duration (min)	5	5	5	5	5

Conductor DC Resistance

The conductor DC resistance complies with the requirements of the GB/T 3956-2008 standard, *Conductors of Cables*. See the table below.

Nominal Cross Section (mm²)	1.5	2.5	4	6	10	16	25	35	50	70	95	120	150	185	240	300
Maximum DC Resistance at 20°C (Ω/km)	12.1	7.41	4.61	3.08	1.83	1.15	0.727	0.5244	0.387	0.268	0.193	0.153	0.124	0.0991	0.0754	0.0601