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ZTT: Reliable Manufacturer of Extra High Voltage Power Cables

ZTT is an experienced and reliable manufacturer and supplier of power cables, specializing in (extra) high voltage (EHV/HV) power cables. With an annual output of approximately 5,000 kilometers, ZTT has established itself as a professional social responsibility company capable of meeting diverse customer requirements while ensuring quick delivery times.

Construction and Specifications

The HV power cables, designed for voltage ranges between 66kV and 500kV, feature a robust construction. They consist of a conductor (copper or aluminum) with a maximum cross-section of 3500mm2, insulated with cross-linked polyethylene (providing superior heat resistance of 90℃). The cables are shielded with metallic screen (such as metallic tapes or wires) as per specific requirements. Finally, they are covered with extruded PVC (ST2), PE (ST7), or halogen-free (ST8) sheath to ensure effective anti-corrosion protection.

International Standards and Customization

ZTT’s HV power cables conform to international standards such as the IEC series (e.g., IEC 60840, IEC 62067) and can be manufactured according to specific customer requirements, including standards like ICEA, AS, BS, DIN, among others. ZTT also has the capability to produce XLPE insulated cables with special features such as waterproofing, termite protection, rat proofing, and river crossing capabilities.

Comprehensive Power System Solutions

ZTT not only provides HV power cables but also offers a comprehensive power system solution for voltage ranges from 66kV to 500kV. This includes XLPE cables, terminations, joints, and other related products. By offering a total solution, ZTT promotes its advantage in 220kV and higher voltage systems, providing customers with a complete package for their power transmission needs.


ZTT stands as a reliable manufacturer and supplier of EHV/HV power cables, delivering high-quality products that meet international standards and cater to customer-specific requirements. With its expertise in cable design, customization, and adherence to stringent quality management, ZTT is the trusted choice for extra high voltage power cables. Whether it’s a single cable or a comprehensive power system solution, ZTT ensures reliable and efficient transmission of electricity for various applications.

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