What will Hyosung Heavy Industries and Quanta Services make in Pennsylvania?

The joint venture will manufacture high-voltage circuit breakers ranging from 72.5 kilovolts to 800 kilovolts. Production is set to take place at Quanta’s existing facility in Canonsburg, Pennsylvania, as early as October.

Why is Hyosung Heavy Industries expanding its U.S. power business?

The company says the partnership combines its power equipment expertise with Quanta’s infrastructure capabilities as it expands in the U.S. power market. Cho Hyun-joon also said rapid AI growth is increasing the need for grid upgrades, and the company wants to strengthen its role as a total solutions provider.

Hyosung Heavy Industries forms US joint venture to make high-voltage circuit breakers

Q: What does the new joint venture mean for Hyosung Heavy Industries in the United States?

It makes Hyosung Heavy Industries the first Korean power equipment manufacturer to establish U.S.-based production of both transformers and high-voltage circuit breakers. The company said this builds on its existing Memphis transformer plant and its long-standing U.S. presence since 2011.

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Summary

Hyosung Heavy Industries is expanding its U.S. manufacturing footprint through a new joint venture in Pennsylvania to make high-voltage circuit breakers. Its subsidiary Hyosung HICO signed the deal with a Quanta Services subsidiary, and production is expected to start as early as October at Quanta’s Canonsburg facility. The venture will produce breakers ranging from 72.5 kilovolts to 800 kilovolts. The move makes Hyosung the first Korean power equipment manufacturer with U.S.-based production of both transformers and circuit breakers.

Key Facts

The joint venture, Hyosung Hico Breaker, was incorporated in July.
Hyosung Heavy Industries has more than 50 years of experience in high-voltage circuit breakers and supplies customers in more than 40 countries.
The company entered the U.S. market in 2011 and has since expanded with products tailored to local utility requirements.
Hyosung’s Memphis, Tennessee transformer plant has involved about $300 million in investment, including acquisition and expansion.
Earlier this year, the company secured an approximately $540 million power equipment supply contract with a major U.S. transmission grid operator.

By Lee Gyu-lee

Published Sep 18, 2026 11:34 am KST

Hyosung Heavy Industries' high-voltage circuit breaker in the United States / Courtesy of Hyosung Heavy Industries

Hyosung Heavy Industries is expanding its U.S. manufacturing footprint through a new joint venture to produce high-voltage circuit breakers in Pennsylvania.

The company said June 16 that its subsidiary, Hyosung HICO, signed an agreement with a subsidiary of Quanta Services to establish Hyosung Hico Breaker, a joint venture for gas circuit breakers.

The joint venture, incorporated in July, will begin manufacturing high-voltage circuit breakers ranging from 72.5 kilovolts to 800 kilovolts as early as October. Production will take place at Quanta's existing facility in Canonsburg, Pennsylvania.

Quanta Services is a major U.S. engineering, procurement and construction company specializing in power and energy infrastructure. It serves utilities, power generation and energy storage projects, data centers, telecommunications providers and other customers across the United States.

The partnership combines Hyosung's power equipment expertise with Quanta's infrastructure capabilities as the Korean company expands its presence in the U.S. power market.

With more than 50 years of experience in high-voltage circuit breakers, Hyosung Heavy Industries supplies the equipment to customers in more than 40 countries. The company entered the U.S. market in 2011 and has since expanded its presence with products tailored to local utility requirements.

The joint venture will make Hyosung Heavy Industries the first Korean power equipment manufacturer to establish U.S.-based production of both transformers and high-voltage circuit breakers.

Chairman Cho Hyun-joon has worked to deepen the company's partnership with Quanta since last year as Hyosung expands its U.S. power business. The two companies have also discussed cooperation on advanced power technologies, including direct-current (DC) solutions.

"Our two companies have built a strong partnership through collaboration across a range of projects, from supplying circuit breakers and substation equipment to supporting power transmission and renewable energy integration projects," Cho said.

"As the rapid growth of artificial intelligence increases the need for grid upgrades, we will draw on the experience gained from localizing our U.S. operations. Together with this new joint venture, we aim to strengthen Hyosung's position as a total solutions provider in the U.S. power market."

Hyosung Heavy Industries' ultra-high-voltage transformer plant in Memphis, Tennessee, has become a key part of its U.S. operations. The company has invested approximately $300 million in the facility, including its acquisition and ongoing expansion. Once the current expansion is complete, the plant is expected to have one of the largest transformer production capacities in the United States.

Earlier this year, Hyosung Heavy Industries secured an approximately $540 million power equipment supply contract with a major U.S. transmission grid operator. The company said it was the largest such contract awarded to a Korean power equipment manufacturer.

According to Global Market Insights, the North American circuit breaker market is projected to grow at a compound annual growth rate of 6.7 percent, from $4.8 billion in 2024 to $9.6 billion by 2034.

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