Type YHKGYFpyn 3.6/6 kV Mining Power cables
SWA armored underground mine power cable with individually shielded copper conductors
With radial field, with PVC insulation, with PVC jacket and overall shield,
With flat steel wire SWA armor, non-diffusion flame resistant PVC jacket
Type YHKGYFpyn cable is a robust, SWA-armored power cable designed specifically for underground mining applications.
Engineered to meet the stringent requirements of hazardous mining environments, this cable ensures safe and reliable power transmission at nominal voltages up to 3.6/6 kV while offering excellent flame resistance and explosion-proof features.
Construction and Materials
Conductors and Shielding
High-Quality Copper Conductors:
The cable uses Class 2, round, compacted copper conductors in accordance with EN 60228.
Individual Shielding:
Each conductor is wrapped in its own shield made of two copper tapes arranged in a radial field. This minimizes electromagnetic interference and helps ensure uniform current distribution.
Overall Screen:
In addition to individual shielding, an overall screen is incorporated into the polywinit sheath, further enhancing electrical performance.
Insulation and Intermediate Layers
Primary Insulation:
Each conductor is insulated with polywinit material (type DIV 14) as specified by PN-HD 620 S1:2002, ensuring excellent dielectric strength and resistance to harsh conditions.
Conductive Tape Layer:
A non-metallic conductive tape is applied over the insulation to stabilize the electrical characteristics.
Filler Layers:
A rubber blend filler is used both within the conductor assembly and around a central copper wire that runs through the twisted shield layers, ensuring uniformity and structural integrity.
Sheath:
The insulated and screened assembly is further enclosed in a polywinit sheath (type DMV 31 according to PN-HD 620 S1:2002), which provides additional protection against environmental factors.
Armor and Protective Jacket
Flat Steel Wire Armoring (SWA):
The cable is mechanically protected by an armor of galvanized flat steel wires. This SWA layer offers enhanced protection against mechanical stresses, cuts, and other hazards common in mining environments.
Outer Jacket:
The entire cable is encased in a non-diffusing, flame-resistant polywinit jacket. The red-colored jacket not only provides additional mechanical protection but also ensures that the cable meets strict fire safety requirements.
Key Characteristics
Operating Conditions:
Temperature: The cable is designed for conductor operation up to +70°C and can be installed in environments ranging from –50°C to +50°C.
Proof Testing: Each cable is tested at 11 kV to verify insulation integrity.
Flexibility:
The minimum bending radius is set at 12 times the cable's outer diameter (12D), ensuring the cable remains flexible while preventing damage during installation.Packaging Options:
The cable is typically available on drums in standard lengths of 500 or 1000 meters, with the possibility of custom lengths and packaging types as required.Standards and Compliance:
It complies with the ZN-TF-202:2015 standard and meets RoHS95 directives, ensuring both performance and environmental safety.
Electrical and Mechanical Specifications
Dimensions and Weights:
Detailed specifications for various cable configurations (such as 3x25/16, 3x35/16, 3x50/16, 3x70/16, 3x95/16, 3x120/16, 3x150/25, and 3x185/25) cover parameters like:Nominal insulation, sheath, and armor thicknesses.
Approximate overall cable diameter and weight (in kg/km).
Maximum conductor resistance at 20°C.
Performance Metrics:
Tables provide current carrying capacities (at an ambient temperature of +25°C), unit inductance (mH/km), and unit inductive reactance (Ω/km) for different conductor cross-sections.Installation Corrections:
For cables installed in parallel on supports, correction factors are applied to reduce the effective current capacity. Additional temperature correction factors are used for ambient temperatures above +25°C, ensuring safe operation under varying conditions.
Applications
The Type YHKGYFpyn 3.6/6 kV Mining Power Cable is specifically designed for the rigorous demands of underground mining. Its features make it ideal for:
Transmitting electric power in circuits with voltages up to 3.6/6 kV.
Operating safely in explosive atmospheres and high-risk environments.
Withstanding mechanical impacts, harsh temperatures, and other challenging conditions typical of underground mines.
Frequently Asked Questions (FAQ)
Q: What is the rated voltage of the cable?
A: The cable is designed for circuits with a nominal voltage up to 3.6/6 kV.
Q: What does SWA stand for?
A: SWA stands for Steel Wire Armor, which in this cable is provided by galvanized flat steel wires.
Q: What type of conductors does the cable use?
A: It employs Class 2, round, compacted copper conductors in line with EN 60228.
Q: How are the conductors shielded?
A: Each conductor has its own shield made of two copper tapes arranged in a radial field to minimize electromagnetic interference.
Q: What material is used for the primary insulation?
A: The cable uses polywinit insulation (type DIV 14) as specified by PN-HD 620 S1:2002.
Q: Is there an additional conductive layer in the cable?
A: Yes, a non-metallic conductive tape is applied over the insulation to enhance electrical stability.
Q: What role does the overall screen play?
A: It provides extra electromagnetic interference (EMI) reduction and complements the individual conductor shields.
Q: What is the purpose of the rubber blend filler?
A: The filler ensures uniformity and structural integrity within the conductor assembly.
Q: Which sheath protects the insulated and screened conductors?
A: The assembly is enclosed in a polywinit sheath (type DMV 31), offering environmental and mechanical protection.
Q: How is the cable armored against physical damage?
A: It is reinforced with a layer of flat, galvanized steel wires (SWA), protecting against cuts, impacts, and harsh conditions.
Q: What is the outer jacket made of?
A: The outer protective layer is a non-diffusing, flame-resistant PVC jacket, ensuring fire safety.
Q: Why is a flame-resistant jacket important in mining?
A: It helps prevent the spread of fire and reduces the risk of explosions in hazardous underground environments.
Q: What are the cable’s color specifications?
A: The insulation is natural in color, while the outer jacket is red for clear visual identification.
Q: What is the maximum operating temperature for the conductors?
A: The conductors can operate safely up to +70°C.
Q: What is the installation temperature range for this cable?
A: The cable is suitable for use in environments from –50°C to +50°C.
Q: How is the cable’s electrical integrity verified?
A: Each cable is proof-tested at 11 kV to ensure insulation quality.
Q: What is the minimum bending radius for this cable?
A: The minimum bending radius is 12 times the cable’s overall diameter (12D).
Q: How is the cable typically packaged?
A: It is supplied on drums in standard lengths of 500 or 1000 meters, with custom options available.
Q: Which standard does the cable conform to?
A: The cable meets the ZN-TF-202:2015 standard.
Q: Is the cable environmentally compliant?
A: Yes, it complies with RoHS95 requirements, ensuring restricted hazardous substance usage.
Q: What is the significance of the radial field design?
A: It ensures even current distribution and minimizes interference in high-noise mining environments.
Q: For what primary applications is this cable intended?
A: It is designed specifically for underground mining power distribution in hazardous, explosive atmospheres.
Q: How does the cable’s explosion-proof design benefit mining operations?
A: It minimizes risks in explosive atmospheres by using flame-retardant materials and robust mechanical construction.
Q: What is the typical insulation thickness of the cable?
A: The insulation is approximately 3.4 mm thick across various cable configurations.
Q: How does the cable ensure electromagnetic compatibility?
A: Through individual conductor shielding and an overall screen, it reduces EMI effectively.
Q: What role does the flat steel wire SWA play in durability?
A: The flat steel wires provide superior mechanical protection against physical damage in harsh underground settings.
Q: How does the cable perform under mechanical stresses?
A: Its robust SWA armoring and durable flame-resistant jacket allow it to withstand impacts, vibrations, and environmental wear.
Q: How does the cable manage high current loads?
A: With high-quality, compacted copper conductors and effective insulation, it delivers stable performance under heavy load.
Q: What correction measures are applied for parallel installations?
A: Correction factors are used (e.g., 1.00 for one cable, 0.93 for two, 0.90 for three, etc.) to account for mutual heating.
Q: How does ambient temperature affect the cable’s performance?
A: Ambient temperature influences current capacity, and specific correction factors adjust performance above +25°C.
Q: What electrical properties are detailed in the cable’s specifications?
A: Specifications include current carrying capacity, unit inductance (mH/km), and unit inductive reactance (Ω/km) for different conductor sizes.
Q: How is the overall shield beneficial in this cable?
A: It works in tandem with individual shields to further reduce interference and improve electrical performance.
Q: What maintenance practices are recommended for mining installations?
A: Regular inspections for physical damage, wear, and periodic electrical testing are advised to ensure long-term reliability.
Type YHKGYFpyn 3.6/6 kV Mining Power Cable
A robust, SWA-armored cable engineered for challenging underground mining environments. This high-performance cable features individually shielded, compacted copper conductors arranged in a radial field for optimal current distribution and minimal interference. It is built with durable polywinit insulation, an overall electromagnetic shield, and a flame-resistant, non-diffusing red PVC jacket for enhanced safety. Designed to operate in extreme conditions from –50°C to +50°C with a maximum conductor temperature of +70°C, it is perfect for reliable power transmission in hazardous mining applications. Fully compliant with ZN-TF-202:2015 and RoHS95 standards, the Type YHKGYFpyn cable delivers exceptional durability, safety, and performance for modern mining power systems.
6/30/20216 min read