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Flame-retardant Rubber Sheathed Cables for Mining Purposes
Rubber Sheathed Flexible Cable with Metallic Screen and Monitoring Core of Rated Voltage 8.7/10kV and below
- Share:
This product is used as power supply connection cable for portable mining equipment or similar devices of rated voltage 8.7/10kV and below.
2. Guide to Use
Max. conductor temperature in normal use is 90℃ and the min. bend radius is 6 times cable diameter. Cables with yellow sheath are not allowed to be exposed to sunlight for a long time.
| Code | Description | Usage |
| MYPTJ-3.6/6 |
Flexible rubber-sheathed cables with individual metallic screen and monitoring core for mining use |
Power supply connection cable for 3.6/6kV portable mining equipment or similar devices |
| MYPTJ-6/10 | Power supply connection cable for 6/10kV portable mining equipment or similar devices | |
| MYDTJ-8.7/10 | Power supply connection cable for 8.7/10kV portable mining equipment or similar devices |
4. Sectional Drawing
5. Technical Particulars
1) MYPTJ-3.6/6
| No. of Cores * Sectional Area (mm2) | Nominal Thickness (mm2) | Overall Diameter (mm) | ||||
| Power Core | Earth Core | Monitoring Core | Power Core Insulation | Inner Sheath | Outer Sheath | MYPTJ-3.6/6 |
| 3*25 | 3*16/3 | 3*2.5 | 4.0 | 2.5 | 5.5 | 61.0-69.0 |
| 3*35 | 3*16/3 | 3*2.5 | 4.0 | 2.5 | 5.5 | 63.5-72.0 |
| 3*50 | 3*16/3 | 3*2.5 | 4.0 | 2.5 | 5.5 | 67.5-76.0 |
| 3*70 | 3*25/3 | 3*2.5 | 4.0 | 3.0 | 5.5 | 72.5-82.0 |
| 3*95 | 3*35/3 | 3*2.5 | 4.0 | 3.0 | 5.5 | 77.0-87.0 |
| 3*120 | 3*35/3 | 3*2.5 | 4.0 | 3.0 | 5.5 | 80.5-90.0 |
| 3*150 | 3*50/3 | 3*2.5 | 4.0 | 3.0 | 5.5 | 84.5-94.5 |
2) MYPTJ-6/10
| No. of Cores * Sectional Area (mm2) | Nominal Thickness (mm2) | Overall Diameter (mm) | ||||
| Power Core | Earth Core | Monitoring Core | Power Core Insulation | Inner Sheath | Outer Sheath | MYPTJ-6/10 |
| 3*25 | 3*16/3 | 3*2.5 | 4.5 | 2.5 | 5.5 | 63.0-71.0 |
| 3*35 | 3*16/3 | 3*2.5 | 4.5 | 2.5 | 5.5 | 66.0-74.5 |
| 3*50 | 3*16/3 | 3*2.5 | 4.5 | 2.5 | 5.5 | 70.5-79.5 |
| 3*70 | 3*25/3 | 3*2.5 | 4.5 | 3.0 | 5.5 | 74.5-84.0 |
| 3*95 | 3*35/3 | 3*2.5 | 4.5 | 3.0 | 5.5 | 79.5-88.5 |
| 3*120 | 3*35/3 | 3*2.5 | 4.5 | 3.0 | 5.5 | 82.5-92.0 |
| 3*150 | 3*50/3 | 3*2.5 | 4.5 | 3.0 | 5.5 | 86.5-96.5 |
3) MYPTJ-8.7/10
| No. of Cores * Sectional Area (mm2) | Nominal Thickness (mm2) | Overall Diameter (mm) | ||||
| Power Core | Earth Core | Monitoring Core | Power Core Insulation | Inner Sheath | Outer Sheath | MYPTJ-8.7/10 |
| 3*25 | 3*16/3 | 3*2.5 | 5.5 | 2.5 | 5.5 | 67.0-76.0 |
| 3*35 | 3*16/3 | 3*2.5 | 5.5 | 2.5 | 5.5 | 71.0-80.0 |
| 3*50 | 3*16/3 | 3*2.5 | 5.5 | 2.5 | 5.5 | 75.0-84.5 |
| 3*70 | 3*25/3 | 3*2.5 | 5.5 | 3.0 | 5.5 | 79.0-88.0 |
| 3*95 | 3*35/3 | 3*2.5 | 5.5 | 3.0 | 5.5 | 83.5-93.0 |
| 3*120 | 3*35/3 | 3*2.5 | 5.5 | 3.0 | 5.5 | 86.5-96.5 |
| 3*150 | 3*50/3 | 3*2.5 | 5.5 | 3.0 | 5.5 | 91.0-101.5 |
6. Technical Performance
1) Conductor Resistance
| Power Core Sectional Area (mm2) | Conductor DC Resistance at 20℃ (Ω/km) | Power Core Sectional Area (mm2) | Conductor DC Resistance at 20℃ (Ω/km) |
| 25 | ≤0.795 | 95 | ≤0.210 |
| 35 | ≤0.565 | 120 | ≤0.164 |
| 50 | ≤0.393 | 150 | ≤0.132 |
| 70 | ≤0.277 |
2) Insulation Resistance
| Power Core Sectional Area (mm2) | Insulation DC Resistance at 20℃ (MΩ·kM) | ||
| Rated Voltage 3.6/6kV | Rated Voltage 6/10kV | Rated Voltage 8.7/10kV | |
| 25 | ≥650 | ≥700 | ≥1250 |
| 35 | ≥550 | ≥650 | ≥1150 |
| 50 | ≥500 | ≥550 | ≥1000 |
| 70 | ≥450 | ≥500 | ≥900 |
| 95 | ≥400 | ≥450 | ≥800 |
| 120 | ≥350 | ≥400 | ≥750 |
| 150 | ≥350 | ≥350 | ≥700 |
3) Max. conductor temperature in normal use: 90℃.
4) Insulation tensile strength is over 6.5MPa, and has an elongation of over 200% at break.
5) Sheath tensile strength is over 11.0MPa, and has an elongation of over 250% at break.
6) 0.38/0.66kV cables can withstand a 3.0kV/5Min voltage test and no
breakdown shall occur; 0.66/1.14kV cables can withstand a 3.7kV/5Min
voltage test and no breakdown shall occur.
7) The flame-retardant performance of the cable meets all requirements of burn test in standard MT 386-1995.
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