Description
ZARLNKTM XL4201 is a cross linkable natural polyethylene compound based on Supercure technology, specially designed for insulation of power cables. The product is a polyethylene copolymer containing <2% of an ORGANIC PEROXIDE and <1% of a thermal stabilizer. No substance contained in the compound can be classified as hazardous in the stated concentrations.
Applications
ZARLNKTM XL4201 is intended for insulation of XLPE medium voltage (MV) AC cables with rated voltages up to 33 kV (Um = 36 kV).
The values are voltages between phases as defined in IEC 60183.
Specifications
ZARLNKTM XL4201 is expected to meet the applicable requirements included in the below mentioned standards provided it is processed using sound material handling, extrusion and crosslinking practices as well as appropriate testing procedures. This applies up to the maximum recommended voltage level indicated in “Applications” section above since some standards cover wider voltage ranges.
- IEC 60502-2
- VDE 0271 – 0273
- BSI 6622
- ANSI/ICEA S-108-720
- ANSI/ICEA S-93-639
Special Features
ZARLNKTM XL4201 is a ready-to-use natural compound. Thanks to its inherent properties, ZARLNKTM XL4201 provides very good electrical performance. It offers excellent scorch resistance and long production runs. ZARLNKTM XL4201 cleanliness level is assured through the Borealis quality management system.
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density (Base Resin) | 0.93 gr/cm3 | ISO 1183 |
| Melt Flow Rate (190’C , 2.16 kg) | 2 gr/10 min | ISO 1133 |
| Elongation at Break (250 mm/min) | >450 % | IEC 60811-401 |
| Tensile Strength (250 mm/min) | 17 N/mm2 | IEC 60811-401 |
| Hot set test (200’C , 20N/cm2) Elongation under load | 75% | IEC 60811-507 |
| Permanent Elongation | 5% | “ |
| MDR , max torque | 2.9 – 3.8 d.Nm | ISO 6502 |
Data should not be used for specification work
Electrical Properties
Data should not be used for specification work
| Property | Typical Value | Test Method |
|---|---|---|
| Dielectric Constant (50Hz) | 2.3 | IEC60250 |
| DC Volume Resistivity (23’C) | >10 P Ohm.cm | IEC 62631 |
| Dissipation Factor (50 Hz) | 0.0003 | IEC 60250 |
Processibility of Compounds
To produce a good and reliable cable, it is essential to ensure careful and very clean handling of the insulation material. Hence all material handling should preferably be conducted in closed systems and in clean room conditions. Please contact your Borealis representative for more details.
Extruder
Recommended using a standard PE extruder with a cooling screw
- Screw diameter : 120-150mm
- Length of screw : 20-25 D
- Screw design : Troester or equivalent having the last 2 D as a Maddox mixing zone or with Shear –mix elements to achieve very good thermal mixing and homogenization of the melt. This is important to prevent overheating of the melt.
- Screen packs : with 4-5 screens (1/0.5/0.3/(0.2)*/0.5 * Optional
Extruder Temperature/Melt Pressure Profile
| Barrel | Z1 | Z2 | Z3 | Z4 |
| Temperature ° C | 125 | 125 | 125 | 125(+/- 4° C) |
- Screw Temperature 100 (+/- 10° C)
- Hopper Temperature 50 (+/- 5° C)
NOTE: It is important to keep the melt temperature under 135° C to avoid “scorching”
Depending on the cable type, line speeds, and outputs different melt pressures can be realized. Usual values for the melt pressure are
- 180 Bar (11 KV, 12 m/min.)
- 260 Bar (25KV, 10 m/min.)
CV Tube Temperature/Pressure Profile (dry curing) For 10-20 KV cables the following profiles are recommended
Line speed 10-15 m/min.
| Tube | Z1 | Z2 | Z3 | Z4 | Z5 | Z6 |
| Temperature ° C | 420 | 410 | 400 | 390 | 380 | 370(+/-30° C) |
Nitrogen Pressure 9-10 bars
Packaging
- Octabin
- Small Bins
Storage
ZARLNKTM XL4201 has a shelf life of 24 months from production date if stored in unopened original packages, under dry and clean conditions at temperatures between 10 – 35°C (50 – 95°F).
The material can be stored at ambient temperature up to 40°C (104°F) for a period up to 6 months provided it is in unopened original packages and under dry and clean conditions. Material shelf life is affected by the storage conditions and extreme conditions influence the general material quality and performance.
Before use, material shall be conditioned indoors (production room) to reach ambient temperature. It is also recommended to ensure proper stock rotation by First In – First Out principle.
Related Files:
| Attachment | Size |
|---|---|
| ZARLNK XL4201.pdf | 141.49 KB |