A Leading Global Manufacturer
of Cable Systems

The cable which ZTT offered shall be designed, manufactured and tested according to international standards

ZTT Cable / Solar PV cable

Product Summary

สายเคเบิลโซล่าเซล แบบทนความร้อน


: Model H1Z2Z2-K, Brand ZTT


: TUV certification number B 098522 001 Rev. 01


: Solar PV Cable, Indoor/Outdoor PV Cable


: Tinned Copper Wire Class 5 : Classification of conductors according to IEC 60228



Outer Sheath


Color options

: Black, Red 

ZTT Cable / Solar PV cable

The cable which ZTT offered shall be designed, manufactured and tested according to international standards as follows:

Quality Control Standard

Component Material Standard

Cable Standard

EN 50618: 2014 Electric cable for photovoltaic systems. According to the EN 50618 standard, PV Cable DC products should be tested and certified by TÜV Rheinland, a world leader in testing, inspection and certification services.


ZTT Cable is a manufacturer of Solar Cable model H1Z2Z2-K which tested and approved by TÜV (Technischer Uberwachungsverein) in accordance with the requirements and EN 50618 : 2014 Standard.


Practicable Indoor & Outdoor Use

Weather Conditions Resistant

Acid Resistant

UV & Ozone Resistant

Non-Halogen Emission in Combustion

Non-flammable, Minimal Residue in Combustion

25 Years Warranty

Structure of ZTT Solar PV Cable model H1Z2Z2-K


Single Core Cable Construction consists of:



Conductor is a flexible wire type using metal materials. It is made of copper and coated with tin metal to prevent oxide formation and prevent resistance inside the conductor.



Insulation made of XLPO (Cross-linked Polyolefin) prevents electricity from flowing only in the conductor and does not leak to other parts, which will cause hazards such as leakage or short circuit. Made of polymer plastic with high electrical resistance It is encapsulated on the conductor with the appropriate thickness so that it can support the voltage according to the rated voltage of the line. There are many types of insulation materials, each with different properties and the material that ZTT produces is Cross-Linked Polyolefin (XLPO).
XLPO insulation is produced by making polyolefin, which is thermoplastic, a chemical reaction transformed into a cross-linked which is stronger and more heat-resistant.



Sheath (shell) made of XLPO (Cross-linked Polyolefin) is the outermost part of the electrical cable. It protects electrical wires from environmental conditions such as abrasion during installation, shock pressure, etc. sunlight It also has flame retardant properties. Low smoke and halogen emissions when exposed to fire.

Irradiation Cross-Linking of Polymers for Cable

Irradiation Cross-Linking is a radiation exposure process used to modify the polymer structure for cable insulation, enhancing its efficiency and resilience to environmental conditions such as fluid temperatures, pressure, and various operational states. This process increases the polymer’s flexibility, extends its lifespan, and allows for the production of insulation with smaller diameters.


The polymer structure is formed by molecules of carbon and hydrogen bonded together in long chains. Typically, the polymer used for cable insulation is Polyethylene, composed of carbon atoms and two hydrogen atoms (CH2).

GMS Solar - PV Cable

When exposed to elevated temperatures, the polymer’s bonding in Polyethylene becomes more pliable, and it can melt. Similarly, operating in low-temperature conditions can alter material properties such as flexibility and strength.


Therefore, Irradiation Cross-Linking helps improve the efficiency and enhance various properties of the material, enabling it to perform better in different temperature conditions.

The main methods of the Cross-Linking process are generally divided into two:

Chemical Vulcanization (CV / Continuous Vulcanization)

This method involves the use of chemicals to induce chemical reactions within the polymer structure, creating heat and pressure to transform the molecular structure of the polymer. A significant drawback of the chemical vulcanization process is the formation of by-products, such as peroxides, which can remain in the polymer. This leads to a reduction in insulating properties and a shorter lifespan. Polymers cross-linked using chemical vulcanization are limited to operating temperatures not exceeding 150 degrees Celsius.


Additionally, there is a risk of material twisting after the manufacturing process, especially in cable production, where it is necessary to use paper insulators to prevent adhesion between the conductor and insulation.

Irradiation Cross-Linking

Irradiation is a process that does not involve heat, pressure, steam, or chemical peroxides. This method avoids the drawbacks associated with chemical vulcanization, as it does not introduce by-products that could affect insulation properties. The irradiation cross-linking process provides greater flexibility in material applications and eliminates the need for paper insulation between the conductor and insulation in cable production. This method allows for a wider range of material uses and avoids the twisting issues associated with chemical vulcanization.

Irradiation Cross-Linking

Irradiation Cross-Linking is a process that utilizes an electron beam generator to shoot electron currents into the polymer, displacing hydrogen atoms from their positions in the hydrogen-carbon chains of the polymer. This aims to allow direct bonding reactions (C-C) between carbon atoms of the polymer, forming a tightly linked molecular structure known as cross-links. These cross-links create strong intermolecular bonds, as illustrated in the accompanying diagram.

Irradiation Cross-Linking

This process transforms the material from a thermoplastic (meltable) substance into a thermoset (non-meltable) material, significantly enhancing its performance and durability. This transformation is crucial in the manufacturing of electrical wires and cables to improve their operational efficiency and resistance. The irradiation cross-linking method strengthens the material by creating a network of cross-links, preventing it from melting and thereby enhancing its overall reliability in various applications.



Temperature resistance

Can work well in high temperature environments, has high current carrying capacity.


It has greater dielectric strength and strength properties.

Thermoset properties (non-molsible)

Prevents short circuit when overheating occurs.

Increased resistance to physical loads (tensile, shear, compression)

It can produce wires that are small and space-saving as well as abrasion resistant.

Do not use water or steam in the irradiation process

Reduce water and moisture problems in induction materials

Increased resistance to compression

The material is stronger and more efficient.

Increased resistance to chemicals and oils

It can be used in environments that are exposed to certain liquids.

Insoluble insulating material embedded with induction material

No need to cover the barrier paper, it can be easily cut and peeled off.

Irradiation does not affect the color of the polymer

The polymer retains its original color condition.

Can improve the flexibility to produce only the resulting product.

Installation of wires and cables is easy. It reduces the time and labor required to work.


ZTT Cable Specifications:

Dimension Data: Dimensional accordance with IEC 60228, EN 50618:2014

Electrical Data: Accordance with IEC 60228, EN 50618:2014

Note: Ambient temperature: 60 °C, Max. conductor temperature: 120°C.

Current rating conversion factors for different ambient temperatures:

ZTT PV Cables Technical Data and characteristics

Operation temperature (°C)

:  -40~+90

Min. bending radius (mm)

: 4D

Design standard

: EN 50618

Flame retardant

: EN 60332-1-2

Low smoke

: EN 61034-2

Halogen free

: EN 60754-1

Resistance to UV

: EN 50618 Annex E

Resistance to Ozone

: EN 50618 and EN 60811-403

Chemical resistance to acid and alkaline

: EN 50618 and EN 60811-404

Presence of water

: Condition AD 7

About ZTT

Why ZTT Cable?




Established In 1992, ZTT embarked on a journey into optical fibre communications. ZTT Cable has evolved and diversified our industrial portfolio, expanding into marine equipment, renewable energy, new materials, smart grid solutions, optical communications and various other diversified product lines for over the years. This strategic diversification has propelled ZTT Cable into a multifaceted and forward-looking industrial player.


ZTT Cable is committed to production and development. products, especially cables, provide high efficiency and quality.




Revenue 2021

Successfully expanded its cable thread business to cover 160 countries global markets with more than 16,000 employees, 54 Branch offices, over 2,500 Patents and ZTT Group reached Revenue for 13,400,000,000 USD in Year 2022.

ZTT Cable has Market Share is No. 1 of China Telecom and has sold many ZTT Cables in Thailand, such as: EGAT, PEA, AIS, TRUE, DTAC etc. and many Solar Farm & Solar Roof contractors.


TOP 10

Strongest Brands

ZTT cable is a brand that ranks among the Top 10 most valuable products in China and leveling A+ of the Top 10 of security products in China by Brand Finance Telecoms Infrastructure of the world.


TOP 10

Most Valuable Brands

ZTT Cable is the Top 5 manufacturer of fiber optic cable products in China.

ZTT Solar Cable ยอดนิยม
ZTT Solar Cable

Brand Finance Telecoms Infrastructure 10

Top10most valuableBrands
Top10 Strongest Brands

ZTT Cable is a company with a financial structure ranked among the top 10 in the world. Telecommunication industry manufacturers

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Project Reference

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