Model 70-120Screw Diameter φ70-120L/D Ratio 26:1/25:1Extrusion Output 140-450 kg/hMain Motor 40-165 KWOutlet Diameter 2-80 mmSpeed 80-300Application NAYY power cable
NAYY Power Cable Extrusion Line
NAYY is a power cable model that complies with the German VDE standard (DIN VDE 0276). Its most prominent feature is that it usually appears in the form of multiple single core cables bundled together.
Analysis of Letter Meanings:N: Compliant with German standards (Norm)
A: The conductor material is aluminum.
YY: The first Y refers to the insulation material being polyvinyl chloride (PVC Insulation); The second Y refers to the sheath material also being polyvinyl chloride (PVC Sheath).
Full name: Aluminum core PVC insulated PVC sheathed power cable.
Common form: NAYY usually refers to single core cables. When used in multi-core applications, it is often referred to as NAYY-J (e.g. 3xNAYY-J), which means that multiple single core NAYY cables are twisted or bundled together in the factory to form a whole.
Execution standard: DIN VDE 0276.
Rated voltage: commonly 0.6/1 kV.
Operating TemperatureLong term allowable working temperature: ≤ 70 ° C (PVC insulation limit)
Maximum temperature during short circuit (maximum duration of 5 seconds): ≤ 160 ° C
Key Features:Advantages:
Extremely low cost: Aluminum conductor+PVC insulation+PVC sheath, forming the most economical combination.
Flexible installation: Single core cables are very flexible, easy to bend and lay. In the form of multi-core bundling, each single core cable can be easily laid separately (such as in a "cross" shape) to reduce eddy current losses.
Durable and sturdy: The PVC sheath provides excellent weather resistance, moisture resistance, and some mechanical protection.
Suitable for direct burial: Its structure is very suitable for direct burial without the need for additional pipes.
Disadvantages:
Poor heat resistance: The working temperature of 70 ° C limits its current carrying capacity.
Containing halogens: When burned, it produces a large amount of black smoke and toxic halogen acid gas.
Aluminum conductor problem: There are issues such as high connection process requirements and susceptibility to oxidation.
NAYY Power Cable Extrusion Line
The NAYY low-voltage power cable extrusion production line is a complete set of equipment specifically designed for manufacturing insulated cores and protective sheaths of power cables rated at 0.6/1 kV and below. Its core process involves melting solid plastics (such as PVC or XLPE) through heating and pressurization, then continuously and uniformly coating conductors (copper/aluminum wires) or assembled cable cores. After cooling and solidification, a smooth, dense, and uniformly thick insulating layer or protective sheath is formed.
Core Components
The NAYY power cable extrusion production line is a highly coordinated automated system, primarily consisting of the following major components:
Pay-off Unit:Supports and releases the conductor or cable core, providing stable and controllable tension to prevent thinning or twisting of the conductor.
Preheater:Heats the conductor before it enters the die head to remove moisture, reduce internal stress, and improve adhesion between the plastic and the conductor.
Extruder:Screw: Conveys, compacts, melts, and homogenizes the plastic.
Barrel: Heats and cools the plastic.
Drive Motor: Provides power to the screw.
Die Head: Connects the extruder to the die.
Die (Tip and Die): Determines the thickness, concentricity, and shape of the extruded layer.
Cooling Trough:Rapidly cools and solidifies the high-temperature cable. Typically features segmented temperature control to ensure material stability and avoid internal stress.
Haul-off Unit:Provides the driving force for the production line. Its speed must be extremely stable, as it is critical for ensuring uniform extrusion thickness.
Spark Tester:An online quality inspection device that applies high voltage to the insulating layer to detect defects such as pinholes or impurities, triggering alarms and marking the locations.
Take-up Unit:Winds the finished cable neatly onto a reel, maintaining constant tension and synchronizing with the haul-off speed.
Control System:Uses a PLC / industrial computer to centrally control all parameters (temperature, speed, tension, etc.), ensuring stable and reproducible production.
NAYY Power Cable Extrusion Line Datasheet
Model |
70 |
80 |
90 |
100 |
120 |
Screw Diameter (mm) |
φ70 |
φ80 |
φ90 |
φ100 |
φ120 |
Screw L/D Ratio |
26:1 |
26:1 |
26:1 |
25:1 |
25:1 |
Extrusion Amount (kg/hr) |
140 |
200 |
250 |
320 |
450 |
Outlet Wire (mm) |
2-15 |
3-25 |
5-35 |
8-60 |
10-80 |
Total Power (KW) |
40 |
55 |
63 |
120 |
165 |
Production Speed(Max., m/min) |
300 |
200 |
200 |
100 |
80 |
Take-up Spool |
500/800 |
800/1250 |
800/1600 |
1000/2000 |
2000/2500 |
Storage Length |
240 m |
200 m |
180 m |
0 |
0 |
NAYY Power Cable Extrusion Line Application
NAYY cables are mainly used in fixed installation scenarios due to their economy and flexibility in installation:
German and European markets: Widely used for power distribution systems in the construction and industrial sectors, especially as one of the preferred options for direct burial.
Industrial and Building Power Distribution:
The main distribution lines of factories, workshops, and residential buildings.
Suitable for various environments such as indoor, outdoor, tunnels, cable trenches, etc.
Direct burial laying: Due to its structural characteristics, NAYY-J (bundle type) is very suitable for underground direct burial, without the need for pipe penetration, and has good compressive performance.
Infrastructure: Commonly used for fixed installation scenarios such as street lamp power supply and park power grid.
NAYY Power Cable Extrusion Line
The NAYY low-voltage power cable extrusion production line is a complete set of equipment specifically designed for producing NAYY cables & other insulation cores and sheaths of power cables with rated voltage of 0.6/1kV and below. The details are as follows:
Conductor Insulation
Function: Extrudes insulating material onto copper or aluminum conductors to form the primary insulation layer.
Common Materials: Cross-linked polyethylene (XLPE), polyethylene (PE), polyvinyl chloride (PVC), etc.
Requirements: Uniform thickness, high concentricity, absence of impurities, and no microvoids. The insulation extrusion process for high-voltage cables demands the highest technical precision.
Sheathing Extrusion
Function: Extrudes a protective sheath over the assembled cable core.
Purpose: Provides mechanical protection, corrosion resistance, moisture resistance, UV resistance, flame retardancy, etc.
Common Materials: Polyvinyl chloride (PVC), polyethylene (PE), polyolefins, etc.