WDZ-YJY Power Cable Extrusion Line

WDZ-YJY Power Cable Extrusion Line

The full name of WDZ-YJY cable is Halogen-Free Low-Smoke Flame-Retardant Copper Core XLPE Insulated Polyolefin Sheathed Power Cable. It is one of the safest and most environmentally friendly types of cables currently on the market, widely used in places with extremely high requirements for safety and environmental protection.
Letter Meanings:
WD: Halogen-Free Low-Smoke
W: Halogen-free. Indicates that the cable materials do not contain halogen elements such as chlorine (Cl), fluorine (F), bromine (Br), or iodine (I).
D: Low-smoke. Indicates that the cable produces low smoke density when burned.
Z: Flame Retardant
Meets the corresponding flame retardant等级 requirements (e.g., Class A/B/C) and effectively prevents flame spread.
YJ: XLPE Insulation
The insulation layer uses cross-linked polyethylene, which offers good heat resistance, excellent electrical performance, and a long-term operating temperature of 90°C.
Y: Polyolefin Sheath
The sheath uses halogen-free polyolefin material, which, together with the insulation material, ensures the cable's halogen-free low-smoke properties.
Operating Temperature:
Long-term allowable operating temperature: ≤90°C
Short-circuit temperature (max. 5s duration): ≤250°C
Main Features (Core Advantages):
Environmental Safety:
Halogen-free: Does not produce toxic, corrosive halogen acid gases when burned, avoiding "secondary disasters," preventing corrosion of expensive electronic equipment, and minimizing harm to the human respiratory system.
Low-smoke: Produces extremely low smoke when burned, with high light transmittance, greatly ensuring personnel evacuation and fire rescue operations at the scene of a fire.
Excellent Flame Retardancy: Passes strict flame retardancy tests and effectively prevents flames from spreading along the cable.
Outstanding Performance: Inherits all the advantages of YJV cables, such as high current-carrying capacity, good heat resistance, high mechanical strength, and long service life.
Disadvantages:
Higher cost: Due to the more complex materials and production processes used, its price is significantly higher than that of ordinary VV cables and also higher than YJV cables.

WDZ-YJY Power Cable Extrusion Line

The WDZ-YJY 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 WDZ-YJY 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.

WDZ-YJY 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

WDZ-YJY Power Cable Extrusion Line Application

The WDZ-YJY low-voltage power cable extrusion production line is a complete set of equipment specifically designed for producing WDZ-YJY 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.