Type YUHKGXSFpyn 3.6/6 kV Power cables
Tensile-resistant, anti-interference, fire-resistant, flame-retardant mining power cable with individual shielding and copper core,
Insulated with cross-linked polyethylene, PVC coating, steel wire armor SWA Cable
Flat, longitudinally sealed, housed in a diffusion-resistant PVC jacket Flame
Type YUHKGXSFpyn 3.6/6 kV Power Cables – Premium Mining & Industrial Cables
The Type YUHKGXSFpyn 3.6/6 kV power cables are engineered specifically for challenging mining and industrial environments. These high-performance cables deliver reliable power transmission while withstanding extreme conditions.
Key Features
Tensile-Resistant & Durable:
Built to endure mechanical stress and harsh operational environments, ensuring long-lasting performance.
Anti-Interference Design:
Each cable features individual shielding around a robust copper core, minimizing electrical interference for stable power delivery.
Fire-Resistant & Flame-Retardant:
The cable construction includes advanced fire-resistant and flame-retardant properties, crucial for safety in high-risk areas.
High-Quality Insulation:
Insulated with cross-linked polyethylene for superior electrical performance, enhanced further by a protective PVC coating.
Steel Wire Armor (SWA):
An additional layer of protection is provided by the steel wire armor, reinforcing the cable against physical damage.
Innovative Flat & Sealed Design:
The flat, longitudinally sealed construction, combined with a diffusion-resistant PVC jacket, offers exceptional flame retardancy and environmental resistance.
Applications
These power cables are ideal for:
Mining Operations:
Perfect for high-stress mining environments where safety and durability are essential.
Industrial Settings:
Suitable for various industrial applications requiring robust and reliable power solutions.
High-Risk Areas:
Designed to minimize hazards in settings with elevated fire and interference risks.
Construction & Materials
Conductor and Individual Shielding:
Conductors: Made of copper, the conductors are round, multi-stranded, and compacted (Class 2 as per EN 60228).
Active Conductor Shield: Each conductor is provided with its own shield. This can be a conductive tape or a polyethylene-based material.
Central Core: The working conductors are twisted around a central core, which can be a copper wire or strand.
Insulation:
The cable uses cross-linked polyethylene (XLPE) insulation (Type DIX 3, according to PN-HD 620 S1:2002), which is known for its durability and high-temperature performance.
Filler and Inner Sheath:
Filler Layer: An unvulcanized rubber or similar compound is used to fill space within the cable.
Inner Sheath: Made of a specific PVC compound (type DMV 31, per PN-HD 620 S1:2002) that protects the insulation.
Armor and Outer Protection:
Armor: The cable is armored with flat steel wires (Fe) to provide mechanical protection.
Longitudinal Sealing: A special tape that swells when exposed to water or moisture is applied along the cable to ensure effective sealing.
Outer Sheath: The final protective layer is an additional PVC jacket (also type DMV 31) that is diffusion-resistant and flame-retardant.
Key Characteristics
Insulation Color: Natural
Coating (Outer Jacket) Color: Red
Temperature Ratings:
Normal Operation (Conductor): Maximum of +90°C
Ambient Temperature (Fixed Installations): Down to –30°C
Laying Without Pre-heating: Down to –50°C
Short-Circuit Condition: Conductor temperature may reach up to +250°C
Minimum Bending Radius: 12 times the external diameter (D) of the cable
Test Voltage: 15 kV AC (applied for 5 minutes at 50 Hz)
Flame Propagation Resistance: Meets IEC 60332-1-2 and IEC 60332-3-24C standards
Tensile Strength: The maximum tensile force is calculated as 50 times the sum of the cross-sectional areas of the conductors (in N)
Applications
Primary Use: Suitable for installation in underground electrical networks in mining plants.
Hazardous Areas: Approved for use in both methane and non-methane zones, including areas classified under various explosion hazard levels (classes A and B for methane and coal dust explosions).
Installation Environment: The armored version (using round or flat steel wires) is also designed for use in inclined shafts or workings with slopes greater than 45°.
Certifications
The cable meets several industry standards and certifications such as ZN-TF 203:2006, EMAG, WUG, and complies with RoHS guidelines. Additionally, it is designed for a continuous operating temperature range from –5°C to +90°C under certified conditions.
Technical Specifications
Construction Details (Examples of Cable Variants)
Each cable variant is specified by:
Conductor Configuration: For example, “3x25/25” means three conductors each with a rated cross-sectional area of 25 mm².
Nominal Thicknesses:
Insulation: Approximately 2.5 mm
Inner Sheath (Coating): Around 1.4 mm (varying slightly with cable size)
Armor: Ranges from 2.5 mm to 3.3 mm depending on the cable size
Physical Dimensions:
Approximate external diameters range from about 44 mm to 75 mm.
Cable weight can vary from roughly 3500 kg/km to over 13,000 kg/km.
Electrical Resistance: Maximum resistance of the conductor at 20°C is given (for example, about 0.727 Ω/km for a 25 mm² conductor, with lower values for larger cross-sections).
Electrical Performance
A separate table provides the following electrical properties based on the conductor cross-sectional area:
Current-Carrying Capacity: Ranges from 146 A for 25 mm² conductors up to 550 A for 240 mm² conductors (at an ambient temperature of +25°C).
Inductance: Unit inductance decreases slightly with increasing conductor size, from approximately 0.35 mH/km for 25 mm² down to 0.27 mH/km for 240 mm².
Inductive Reactance: Similarly, unit reactance ranges from 0.111 Ω/km for smaller conductors down to about 0.084 Ω/km for the largest sizes.
Correction Factors
For installations where multiple cables are laid in parallel (one above the other on supports), the current-carrying capacities must be adjusted by applying correction factors:
Based on the Number of Cables Stacked:
1 cable: Factor of 1.00
2 cables: Factor of 0.93
3 cables: Factor of 0.90
6 cables: Factor of 0.87
9 cables: Factor of 0.86
Based on Ambient Temperature (Above +25°C):
For example, at 30°C the factor is 0.96, at 35°C it is 0.92, down to 0.73 at 55°C.
These factors apply to cables designed for a long-term operating conductor temperature of +90°C.
Conclusion
When you need a power cable that combines superior tensile strength, anti-interference performance, and exceptional fire resistance, the Type YUHKGXSFpyn 3.6/6 kV power cables provide the ideal solution. Their innovative design and premium materials make them a top choice for mining and industrial applications, ensuring safe and efficient power distribution even in the most demanding conditions.
Frequently Asked Questions (FAQ)
Q: What is the rated voltage of this cable?
A: The cable is designed for a rated voltage of up to 6 kV.
Q: What are the primary applications of this cable?
A: It is intended for underground electrical networks in mining plants, particularly in hazardous areas with potential methane or coal dust explosion risks.
Q: Is this cable suitable for use in explosive atmospheres?
A: Yes, it is designed and certified for both methane and non-methane hazardous areas, meeting explosion safety requirements.
Q: What insulation material is used in this cable?
A: The cable is insulated with cross-linked polyethylene (XLPE), which offers high thermal stability and durability.
Q: How is the cable protected against mechanical damage?
A: It features a robust construction with flat steel wire armor (SWA) that provides excellent tensile strength and physical protection.
Q: What is the purpose of the individual conductor shielding?
A: Each conductor is individually shielded using conductive tapes or polyethylene-based materials to minimize electrical interference and improve signal integrity.
Q: How does the cable prevent water ingress?
A: A longitudinal sealing tape, which swells upon exposure to water and moisture, is used to ensure the cable remains watertight.
Q: What temperatures can the cable withstand during normal operation?
A: The conductors are rated to operate at a maximum of +90°C under normal conditions.
Q: What is the cable’s performance under short-circuit conditions?
A: During a short-circuit, the conductor temperature can reach up to +250°C.
Q: What is the minimum bending radius for installation?
A: The minimum bending radius is 12 times the cable’s external diameter, ensuring flexibility without damaging the structure.
Q: How is the cable tested for electrical integrity?
A: It undergoes a high-voltage test at 15 kV AC for 5 minutes at 50 Hz to verify insulation performance.
Q: What standards does this cable comply with?
A: It meets several standards including ZN-TF 203:2006, IEC 60332 fire standards, and PN-HD 620 S1:2002 for insulation and sheathing.
Q: What are the cable’s flame-retardant properties?
A: The outer PVC sheath is formulated to resist flame spread, complying with IEC 60332-1-2 and IEC 60332-3-24C standards.
Q: Can this cable be installed in inclined mine shafts?
A: Yes, its design is suitable for installation in shafts and workings with slopes over 45°.
Q: How does the cable perform in extremely low ambient temperatures?
A: It is designed for fixed installations in ambient temperatures down to –30°C, and even –50°C when laid without pre-heating.
Q: What type of conductors are used in the cable?
A: The conductors are round, multi-stranded, and compacted copper wires in accordance with EN 60228 (Class 2).
Q: What is the role of the central core in this cable’s construction?
A: The central core provides mechanical support by holding the working conductors together in a twisted configuration.
Q: How is the cable’s current-carrying capacity determined?
A: It is based on the cross-sectional area of the conductors and can be adjusted using correction factors for installation conditions.
Q: How are correction factors applied in multi-cable installations?
A: When cables are installed in parallel (stacked), current capacity must be reduced by a correction factor (e.g., 0.93 for two cables, 0.90 for three cables).
Q: What happens to the current-carrying capacity at higher ambient temperatures?
A: Additional correction factors are applied—for example, a reduction to 0.96 at 30°C and down to 0.73 at 55°C—to ensure safe operation.
Q: Is the cable RoHS compliant?
A: Yes, it meets RoHS guidelines, ensuring it is free from certain hazardous substances.
Q: What is the significance of the XLPE insulation used?
A: XLPE provides excellent thermal resistance, mechanical strength, and electrical insulation properties, making it ideal for harsh mining environments.
Q: How does the cable’s construction support high tensile resistance?
A: The robust copper conductors, individual shielding, and steel wire armor together ensure high tensile strength and resistance to mechanical stress.
Q: What are the cable’s outer sheath characteristics?
A: The outer sheath is made of a diffusion-resistant PVC material that is flame-retardant and provides additional mechanical protection.
Q: How is the cable packaged for delivery?
A: Standard packaging is available in 500 or 1000-meter drums, though custom lengths and packaging options can be arranged.
Q: What are the key electrical properties of the cable?
A: The cable’s electrical properties include low inductance and reactance, which are essential for efficient power transmission in mining networks.
Q: How is the maximum tensile strength calculated for this cable?
A: It is calculated as 50 times the sum of the cross-sectional areas of the working conductors (in N).
Q: What colors are used for the insulation and outer sheath?
A: The insulation is natural in color, while the outer sheath is typically red.
Q: How does the cable’s armor contribute to its durability?
A: The flat steel wire armor provides robust protection against mechanical impacts, rodent damage, and other physical hazards common in mining environments.
Q: Are there any specific certifications for this cable?
A: Yes, the cable has received certifications such as EMAG and WUG, confirming its suitability for rigorous industrial and mining applications.
Q: How does the cable manage interference in harsh environments?
A: The individual shielding on each conductor minimizes electromagnetic interference, ensuring stable operation in electrically noisy mining environments.
Q: What maintenance considerations should be taken into account when installing this cable in mining sites?
A: Regular inspections for mechanical damage, moisture ingress, and adherence to bending and installation guidelines are essential to maintain performance and safety.
Type YUHKGXSFpyn 3.6/6 kV Mining Power Cable
Type YUHKGXSFpyn 3.6/6 kV Mining Power Cable is a robust, flame-retardant cable engineered for harsh underground mining environments. Featuring high tensile strength with individually shielded copper conductors and durable XLPE insulation, this cable is designed to perform reliably in explosive hazardous areas such as methane and coal dust zones. Its construction includes a protective steel wire armor (SWA), waterproof sealing tape, and a diffusion-resistant PVC jacket, ensuring excellent mechanical protection and long-lasting performance even in extreme temperatures. Certified to meet international standards, this mining power cable offers outstanding electrical properties, making it the ideal choice for critical underground electrical installations and industrial applications.
6/30/20218 min read