Type YHKGXFtlyn Mining Cable 0.6/1 kV
Power cable, mining, with copper cores, in an individual radial field screen, with cross-linked polyethylene insulation, in a PVC sheath, armoured with varnished steel tapes, in a flame retardant PVC sheath
Type YHKGXFtlyn Mining Cable is designed for underground power networks in mining environments where safety is critical. It is rated for voltages up to 1 kV and is built to meet strict standards (ZN-TF 205:2006).
Its robust construction makes it suitable for hazardous areas where there may be risks of methane or coal dust explosions.
Construction Details
Conductor
Material & Design: Made of copper, the conductors are multi-stranded and compacted to Class 2 according to EN 60228.
Configuration: The working cores are twisted around a central core (which may be a copper wire or strand).
Insulation
Material: Cross-linked polyethylene (XLPE) of type DIX 5.
Standard: Manufactured as per PN-HD 603 S1:2002.
Appearance: The insulation has a natural (typically off-white) color.
Individual Screen
Function: Provides a radial field screen for each conductor.
Structure: It can be implemented as an extruded semiconducting tape, often combined with a copper wire and copper tape to enhance shielding.
Filler Layer
Material: Typically consists of an unvulcanized rubber or PVC-based compound used to fill the spaces and maintain the cable’s shape.
Inner Sheath
Material: Made from PVC (type DMV 6) in accordance with PN-HD 603 S1:2002.
Armour
Reinforcement: The cable is reinforced with varnished steel tapes, providing mechanical protection and additional strength.
Outer Sheath
Material: A flame-retardant PVC (also type DMV 6) covers the armour to ensure high safety standards in explosive environments.
Color: Typically yellow.
Key Characteristics
Temperature Ratings:
Operating Temperature: The conductor can operate continuously at up to +90°C.
Short-Circuit Temperature: Can reach up to +250°C during fault conditions.
Ambient Conditions: Suitable for permanent installation in environments as low as -30°C, and cables can be installed without preheating down to -50°C.
Mechanical Properties:
Bending Radius: The cable must not be bent to a radius smaller than 12 times its overall diameter.
Tensile Strength: Maximum pulling force is determined as 50 times the sum of the conductors’ cross-sectional areas.
Electrical Testing:
The cable withstands a 4 kV AC test voltage (applied for 5 minutes at 50 Hz).
Flame Retardancy:
It meets the requirements of IEC 60332-1-2 and IEC 60332-3-24C, ensuring resistance to flame spread.
Available Sizes and Performance Data
Variations: The cable is available in several sizes, such as 3x16, 3x25, 3x35, up to 3x185, where “3x” denotes three conductors and the number indicates the conductor cross-sectional area in mm².
Dimensional Data: For each size, detailed tables specify:
Nominal thicknesses of insulation, inner sheath, and outer sheath.
Approximate overall cable diameter.
Cable weight per kilometer.
Maximum conductor resistance at 20°C.
Electrical Characteristics:
Current-carrying capacity is provided for each conductor size at an ambient temperature of +25°C.
Tables also list inductance (in mH/km) and inductive reactance (in Ω/km) values.
Parallel Installation Considerations:
When cables are installed one above the other on supports, the current-carrying capacity must be adjusted using correction factors that depend on the number of cables and the ambient temperature (especially when above +25°C).
Applications
This cable is specifically engineered for underground mining power networks. It is suitable for:
Non-methane and Methane Areas: Can be safely used in zones with potential methane presence, as well as in areas with coal dust where explosion risks are classified into danger levels “a”, “b”, and “c”.
Harsh Environments: Its robust construction, flame retardant properties, and mechanical strength make it ideal for the challenging conditions encountered in mines.
Frequently Asked Questions (FAQ)
What is the voltage rating of this cable?
Answer: The cable is rated for 0.6/1 kV, making it ideal for low-voltage power distribution in mining operations.
What type of conductor is used in the cable?
Answer: It uses multi-stranded copper conductors that are compacted to Class 2 in accordance with EN 60228. This design ensures both excellent electrical conductivity and mechanical flexibility.What insulation material is used, and why is it beneficial?
Answer: The cable is insulated with cross-linked polyethylene (XLPE), which offers high thermal resistance, excellent durability, and reliable performance in harsh mining environments as per PN-HD 603 S1:2002.How is the cable shielded, and what benefits does the shield provide?
Answer: Each conductor is individually screened with a radial field screen. This is typically made of an extruded semiconducting tape combined with copper elements, providing effective electromagnetic shielding and reducing electrical interference.What makes this cable suitable for hazardous mining areas?
Answer: The cable is designed and tested to meet strict safety standards (ZN-TF 205:2006). Its flame-retardant PVC outer sheath and robust construction help ensure safe operation in areas with methane or coal dust, where explosion risks are a concern.What mechanical protections are incorporated in the cable?
Answer: The cable features a robust armouring layer made from varnished steel tapes, which provides enhanced mechanical strength and protects the cable from physical damage in rugged underground mining conditions.Is the cable flame-retardant?
Answer: Yes, the outer sheath is made of flame-retardant PVC (type DMV 6) that meets IEC 60332-1-2 and IEC 60332-3-24C standards, ensuring that the cable helps prevent the spread of fire.What temperature ranges can the cable operate within?
Answer:The conductor is rated for continuous operation at up to +90°C.
It can handle short-circuit conditions up to +250°C.
It is suitable for ambient temperatures as low as -30°C for permanent installations, and down to -50°C for installation without preheating.
What are the installation guidelines regarding bending and cable grouping?
Answer:The minimum bending radius should be at least 12 times the cable’s overall diameter.
When installing cables in parallel (e.g., stacked on supports), correction factors must be applied to the current-carrying capacity, ensuring safe operation in confined spaces.
How does the cable’s construction enhance safety in mining operations?
Answer: Its multi-layer construction—including XLPE insulation, an individually screened conductor, an inner PVC sheath, steel tape armouring, and a flame-retardant outer sheath—ensures high durability, excellent mechanical protection, and robust fire resistance, which are critical for safety in explosive and harsh mining environments.How is the cable typically packaged and delivered?
Answer: Standard packaging options include 500 or 1000 meters on a drum. However, other lengths and packaging configurations can be provided based on specific project requirements.What testing does the cable undergo to ensure its reliability?
Answer: The cable is rigorously tested, including a 4 kV AC withstand test for 5 minutes at 50 Hz. This test verifies the cable’s ability to handle electrical stress, ensuring reliable performance in demanding mining applications.
Type YHKGXFtlyn Mining Cable 0.6/1 kV
Type YHKGXFtlyn Mining Cable is a robust, low-voltage power cable designed specifically for underground mining applications. Rated for 0.6/1 kV, it features multi-stranded, compacted copper conductors insulated with high-performance cross-linked polyethylene (XLPE). Each conductor is individually shielded with a radial field screen, then covered by an inner PVC sheath. The cable is further reinforced with varnished steel tapes and protected by a flame-retardant PVC outer jacket. Built to meet strict standards (ZN-TF 205:2006), this cable is engineered for safety and durability in hazardous mining environments, including areas with methane or coal dust risks, while withstanding extreme temperatures and mechanical stress.
6/30/20215 min read