Guangdong High-Tech Enterprise Association released the list of approved 2025 Guangdong High-Quality High-Tech Products. Two products independently submitted by Guangzhou Lingnan Cable Co., Ltd. (Lingnan Cable)—a medium- and low-voltage waterproof power cable and a 220kV high-voltage cable with a new protective layer—have successfully been selected after formal review, expert evaluation, and final verification. Lingnan Cable is a holding company of Guangzhou Zhiguang Electric Co., Ltd.

Guangdong High-Quality High-Tech Product designation represents an extension and upgrade of the provincial high-tech product program. The evaluation standards have been significantly elevated, placing stricter requirements on technological innovation, quality performance, and market potential. With a high threshold and strong recognition value, selected products must demonstrate features such as domestic first-of-its-kind capabilities, import substitution, and achieving advanced international or domestic levels. This distinction is a key indicator of a company’s core competitiveness and an important reference in high-tech enterprise assessments.

Medium- and Low-Voltage Waterproof Power Cable

This product adopts longitudinal aluminum-plastic laminated tape hot-sealing technology combined with specialized polymer materials to form a continuous waterproof barrier that effectively prevents moisture from penetrating into the cable core. It delivers excellent radial and longitudinal water-blocking performance, effectively suppressing the formation of “water treeing,” significantly enhancing insulation properties, and extending service life.

The product is ideally suited for tunnels, utility corridors, regions with heavy rainfall, and other humid environments. It prevents insulation failures caused by moisture ingress and greatly improves the safety and reliability of urban power grids, rail transit systems, and large-scale building power supply networks—safeguarding the city’s critical “lifeline” infrastructure.

220kV High-Voltage Cable with New Protective Layer

Designed for high-voltage transmission systems, this cable features enhanced reliability through optimized protective-layer structure and improved composite materials. The design increases the contact surface between the protective layer and metallic sheath, ensuring more uniform electrical contact while absorbing deformation caused by thermal expansion. It provides excellent fault-current conduction capability, significantly reducing “white spot” and “ablation” issues arising from poor electrical contact, and greatly improving long-term operational reliability.

This product is particularly suitable for ultra-high-voltage transmission and distribution lines, extending service life and operational stability while reducing lifecycle maintenance costs. It delivers safer, more economical, and longer-lasting cable solutions for national key infrastructure, large-scale power projects, and renewable-energy grid-integration.

Carrying this recognition as motivation, Lingnan Cable will continue to advance technological innovation and product development, supporting high-quality corporate growth and strengthening its market competitiveness in both technology and quality. The company remains committed to driving progress as a technological engine, contributing reliable “Lingnan strength” to smart grid development and the realization of China’s dual-carbon goals.