Drill Cables MZ-0.3/0.5kV MT/T 818.8-2009 for Mining Purpose
Drill Cables MZ-0.3/0.5kV MT/T 818.8-2009 Manufacturing Standard for Mining Purpose for Colliery Electrical Connection of Drills with MA Certificate
Application:
Drill Cables MZ-0.3/0.5kV MT/T 818.8-2009 is intended for electrical connection of drills with rated voltage up to 0.3/0.5kV for colliery.
Manufacturing standard:
MT/T 818.8-2009
Service Property Parameter：
1. Rated voltage U0/U is 0.3/0.5kV.
2. The max,temperature of conductor in normal operation is 65℃.
3. The minimum-bending radius of cable is 6 times of cable diameter.
Type & Description：
| Type | Description |
|---|---|
| MZ-0.3/0.5kV | Drill cables for mining purposes |
| MZP-0.3/0.5kV | Drill cables with screens for mining purposes |
Structural Sketch：
Main Technical Indexes：
1. 20℃ D.C conductor resistance shall comply with thestipulation of GB/3956.
2. Insulation resistance of power core should be not lessthan 160MΩ·km.
3. Voltage test: The cable should pass voltage test of A.C. 2kV lasted 5 min, No breakdown of the insulation shall occour.
4. Flame retardance test: The methods of test and requirements shall be those specified in MT386.
| Specifications & structure size | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No.of cores x section area(mm²) | Conductor structure | Nominal thickness(mm) | Outer diameter of cable(mm) | Weight for reference kg/km | Ampacity at 20℃ (A) | ||||||
| Power core | Earth core | Control core | Strands/Diameter | Power core Insulation | Sheath | MZ-0.3/0.5kV | MZP-0.3/0.5kV | MZ-0.3/0.5kV | MZP-0.3/0.5kV | MZ-0.3/0.5kV | MZP-0.3/0.5kV |
| 3x2.5 | 1x2.5 | — | 77/0.20 | 1.0 | 3.5 | 17.7~19.4 | 19.5~21.5 | 565 | 621 | 25 | 25 |
| 3x4 | 1x4 | — | 126/0.20 | 1.0 | 3.5 | 19.1~21.0 | 21.0~23.1 | 679 | 735 | 35 | 35 |
| 3x2.5 | 1x2.5 | 1x2.5 | 77/0.20 | 1.0 | 3.5 | 18.9~20.8 | 21.1~23.2 | 640 | 696 | 25 | 25 |
| 3x4 | 1x4 | 1x4 | 126/0.20 | 1.0 | 3.5 | 20.5~22.6 | 22.8~25.1 | 775 | 837 | 35 | 35 |
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