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A Leading Global Manufacturer of Cable Systems


ZTT is an experienced and reliable manufacturer and supplier of insulators for overhead transmission line, substation, distribution line (rural), railway. ZTT has about 350,000km successful operation performance now. It forms about 1,000,000 sets (appr 5,000 tons) of composite insulators annual output and becomes a professional company and satisfies different customers’ requirements with quickest delivery time. ZTT has rich experience and successful supplies. ZTT composite insulator passed the 5,000h Multi-stress test in a STL laboratory.


Design & Construction

Insulator is the devices for electrical insulation and mechanical fixation of electrical equipment or conductors at different potentials. The max mechanical strength of ZTT insulator is up-to 1000kN..


Reference Standards

The products meet the international standards of IEC series (such as IEC 61109, IEC 61952, IEC 383 etc.) and can be manufactured according to customers’ requirements of standards such as AS, IS, etc. ZTT also can produce fittings and accessories with special requirements.

Types & Purposes

  • Suspension/tension insulator for transmission line

    -Pin insulator for transmission line

    -Post insulator for substation

    -Cross-arm insulator

    -Railway insulator

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