NA2XS2Y Power Cable Extrusion Line

NA2XS2Y Power Cable Extrusion Line

NA2XS2Y is a cable model that follows the German standard DIN VDE. It is a single core medium voltage power cable with halogen-free, low smoke, cross-linked polyethylene insulation, copper tape shielding, and polyolefin outer sheath.
Letter Meaning:
N: Standardized manufacturing and testing in accordance with VDE standards (Normenlitung)
A: Halogen Free, Low Smoke Characteristics
2X: Cross linked polyethylene (XLPE) insulation
S2: Copper Tape Screen. This is the core difference from NA2XSY (copper wire armor).
Y: Polyethylene or Polyethylene based Compound Sheath
Key Features:
Excellent fire safety performance:
Halogen Free: Does not release corrosive halogen acid gases during combustion, protecting personnel and precision equipment.
Low Smoke: The amount of smoke emitted during combustion is extremely low, with high visibility, making it easy for personnel evacuation and firefighting rescue.
Excellent electrical performance: XLPE insulation allows it to operate at temperatures up to 90 ℃ for a long time, and can reach 250 ℃ during short circuits, with a large current carrying capacity.
Uniform electric field and shielding: Copper strip shielding (S2) is its core structure.
Conductor shielding: There is also a layer of semiconducting shielding on the surface of the conductor (usually co extruded with the insulation layer), which together with the copper strip shielding layer forms a complete shielding system.
Function: Uniform insulation electric field distribution, limiting the electric field inside the insulation; Effectively suppress external electromagnetic interference and prevent the cable itself from causing electromagnetic interference to the outside world.
Weather resistance: The polyolefin outer sheath has good weather resistance, ozone resistance, and certain chemical corrosion resistance.

NA2XS2Y Power Cable Extrusion Line

The NA2XS2Y medium-voltage power cable extrusion production line is a complete set of equipment specifically designed for manufacturing the core components of medium-voltage power cables rated at 3.6/6 kV to 26/35 kV. This production line applies molten plastic to the conductor in a high-temperature, high-pressure, and continuous manner, ensuring uniform coating. Subsequent cross-linking processes endow the cable with excellent electrical, thermal, and mechanical properties. Given that the products are used in medium- and high-voltage applications, the requirements for the purity, uniformity, and defect-free nature of the insulation layer are extremely high. As a result, medium-voltage production lines are technologically more complex, require higher precision, and involve greater investment compared to low-voltage production lines.

Main Components

The NA2XS2Y medium-voltage powder cable extrusion line primarily consists of the following components, arranged according to the process flow:
Pay-Off Device
Function: Supports and feeds copper or aluminum conductors. Provides stable and adjustable tension control to prevent thinning or抖动 of the conductor.
Types: Active pay-off (powered) or passive pay-off (unpowered, controlled by braking).
Conductor Pre-Heater
Function: Heats the conductor to a certain temperature (e.g., above 90°C) before extrusion.
Purpose:
Removes moisture from the conductor surface to prevent bubble formation ("microvoids") during extrusion.
Reduces the temperature difference between the conductor and the molten insulation material, minimizing internal stress and improving interfacial bonding quality.
Two or More Layers Co-Extrusion System
This is the technological core of the medium-voltage production line, typically consisting of two or more extruders and a shared die head.
Online Detection and Control System
Laser Diameter Gauge: Monitors the insulation outer diameter in real-time without contact and feeds data back to the control system to automatically adjust the extruder or traction speed, ensuring minimal thickness tolerance.
Eccentricity Gauge: Ensures the insulation layer is uniformly coated on the conductor without core shift.
Spark Tester: Detects defects such as pinholes or breaks in the insulation layer online (applicable only to cores with an outer shield, which must be grounded).
Industrial Computer/PLC: The "brain" of the entire production line, centrally controlling parameters such as temperature, speed, tension, and pressure for all equipment.
Traction Device
Function: Provides the driving force for the production line, pulling the cable forward at a constant or programmable speed. Requires extremely stable speed without vibrating.
Types: Caterpillar haul-off or dual-wheel capstan.
Take-Up Device
Function: Winds the cooled and set finished insulated core neatly onto large reels.
Requirements: Synchronized with the traction speed, constant and adjustable tension, and neat winding.

NA2XS2Y Power Cable Extrusion Line Datasheet

Model	120+100	200+120
Screw Diameter (mm)	φ120+φ100	φ200+φ120
Screw L/D Ratio	25:1	25:1
Extrusion Amount (kg/hr)	φ120: ≤450 kg/h, φ100: ≤320 kg/h	φ200: ≤1000 kg/h, φ120: ≤500 kg/h
Inlet Wire (mm)	/	55-160
Outlet Wire (mm)	10-80	70-180
Traction (N)	/	≤32000
Production Speed(Max., m/min)	80	30
Pay-off Spool (mm)	φ1000-φ2500	φ2000-φ4200
Take-up Spool (mm)	φ1000-φ2500	φ2000-φ4200

Core Components List

Rail-mounted Motorized Pay-off Stand	2 sets
Auxiliary Caterpillar Puller	1 set
Asphalt Coating Unit	1 set
Ø200 Extruder / Ø120 Extruder	1 set
Ø120 Extruder / Ø100 Extruder	1 set
Dual-layer Extrusion Head and Cart	2 sets
Extrusion Head Vacuum Unit	1 set
Mobile Water Trough and Hot Water Tank	1 set
Stainless Steel Cooling Trough	1 set
Cable Air Wiping / Drying Unit	1 set
Length Counter / Meter Counter	1 set
Main Caterpillar Puller / Haul-off	1 set
Graphite Coating Unit	1 set
Rail-mounted Motorized Take-up Stand	2 sets
Spark Tester	1 set
Electrical Synchronous Control System	1 set

NA2XS2Y Power Cable Extrusion Line Application

NA2XS2Y cable is mainly used in medium voltage transmission and distribution systems that require high safety and reliability:
Underground power grid system: the distribution network of urban power grids, large commercial centers, data centers, and hospitals.
Industrial sector: The main power supply lines of factories with strict requirements for fire prevention and halogen-free in chemical, petrochemical, pharmaceutical and other industries.
Infrastructure: Power supply systems for densely populated areas such as subways, tunnels, airports, and train stations.
Renewable energy: Collection systems for wind farms and solar power plants.

NA2XS2Y Power Cable Extrusion Line

The NA2XS2Y medium-voltage extrusion line is specifically used to manufacture the core parts (insulated wire cores) of the following products:
Power transmission and distribution: Producing various medium voltage levels (such as 8.7/10kV, 8.7/15kV, 26/35kV) of transmission and distribution cables is the "main artery" of urban power grids, industrial parks, and large building power supply systems.
Specific industry requirements:
Flame retardant/fire-resistant cables: By using special materials such as halogen-free low smoke flame-retardant polyolefins, safe cables are produced for use in densely populated areas such as subways, airports, and shopping malls.
Waterproof cable: Produce longitudinal waterproof cables with a metal waterproof layer for use in rainy, humid areas or direct burial.
Mining cables: Produce mining armored cables with high mechanical strength and wear resistance.
Subsequent deep processing: The insulated wire cores produced from the CV line will also be sent to a cable forming machine for twisting (such as three core cable), and then extruded with inner sheath, armor layer (such as steel strip, steel wire) and outer sheath on the sheath line, ultimately forming a complete structure of the cable.