LS Cable Passes Test for Korea’s Highest-Capacity HVDC Submarine Cable

First 525kV, 80°C-Class PQ Certification Achieved

Up to 25% Increase in Power Transmission Capacity

Securing Long-Distance, High-Capacity Submarine Cables

LS Cable is stepping up the commercialization of HVDC (High Voltage Direct Current) submarine cables with the highest power transmission capacity in Korea, strengthening its push for the West Coast Energy Expressway project.

LS Cable announced on July 9 that it has passed the PQ (Pre-Qualification) test for Korea’s first 525kV, 80°C-class HVDC submarine cable.

With the successful completion of this PQ test, LS Cable has secured a supply base for 525kV, 80°C-class submarine cables applicable to the West Coast Energy Expressway project. The PQ test is an international certification process that verifies long-term performance and reliability. Once a contract is awarded, only a type test is required for product supply.

This product increases the conductor’s allowable temperature from the previous 70°C to 80°C, improving power transmission capacity by up to 25%. It is a next-generation submarine cable suitable for long-distance and high-capacity power transmission, requiring advanced high-voltage insulation technology and long-term reliability.

An LS Cable employee is testing an HVDC cable. LS Cable.

As the spread of AI (artificial intelligence) data centers and the expansion of renewable energy accelerate, the demand for long-distance, high-capacity transmission networks is rapidly increasing, driving growth in the HVDC market. LS Cable holds the only domestic track record of commercialized HVDC cable supply, having provided cables for the Jeju 2·3 connection projects and Europe’s TenneT project.

An LS Cable official said, “Passing the PQ test is an important milestone for entering the next-generation national power grid market. Leveraging our turnkey manufacturing and construction capabilities with LS Marine Solution, we will further strengthen our presence in the Energy Expressway and the global HVDC market.”

In line with the expansion of the power infrastructure market at home and abroad, subsidiaries are also enhancing their business competitiveness. LS Eco Energy has completed the PQ test for 400kV-class ultra-high voltage cables for North America, and Gaon Cable plans to supply ultra-high voltage cables meeting Korea Electric Power Corporation (KEPCO) standards starting next year.

This content was produced with the assistance of AI translation services.