This product is a flame-retardant power cable with a copper core, 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. Its performance complies with the relevant coal industry standards specified in MT818.11–MT818.13-2009, *Cables for Coal Mines: Fixed-Installation Power Cables Rated 10 kV and Below*.

**Key Product Performance Characteristics**

**1. Operating Characteristics**

(1) The maximum rated temperature for the conductors of PVC-insulated cables is 70°C; for XLPE-insulated cables, it 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-insulated cables, or 250°C for XLPE-insulated cables.

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

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

(5) The use and maintenance of this product must strictly adhere to the regulations stipulated in the *Coal Mine Safety Regulations*.

**2. Key Electrical Performance Characteristics**

The DC resistance of the conductor complies with the provisions of GB/T 3956-2008, *Conductors of cables*.

 The flame-retardant performance of the cables meets all testing requirements specified in MT/T 386-2011, *Test Methods and Judgment Rules for Flame Retardance of Flame-Retardant Cables for Coal Mines*.

(1) PVC-Insulated Power Cables for Coal Mines with a Rated Voltage of 1.8/3 kV and Below

Model, Name, and Scope of Application

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

Model, Name, and Scope of Application

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

(1) PVC-Insulated Power Cables for Coal Mines

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