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

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.

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.

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.

晓星重工正通过在宾夕法尼亚州成立一家新的合资企业来扩大其在美国的生产规模，该合资企业将生产高压断路器。其子公司晓星HICO与昆塔服务公司（Quanta Services）的子公司签署了这项协议，预计最早将于10月在昆塔位于卡农斯堡的工厂开始生产。该合资企业将生产72.5千伏至800千伏的断路器。此举使晓星成为首家在美国同时生产变压器和断路器的韩国电力设备制造商。

合资企业晓星Hico Breaker于7月成立。

晓星重工在高压断路器领域拥有超过50年的经验，并为40多个国家的客户提供产品。

该公司于 2011 年进入美国市场，此后不断扩大规模，推出符合当地公用事业需求的产品。

晓星位于田纳西州孟菲斯的变压器工厂已投入约 3 亿美元，包括收购和扩建。

今年早些时候，该公司与美国一家大型输电网运营商签订了一份价值约 5.4 亿美元的电力设备供应合同。

发布于2026年9月18日上午11:34（韩国标准时间）

晓星重工在美国的高压断路器 / 图片由晓星重工提供

晓星重工正通过一家新的合资企业扩大其在美国的生产规模，该合资企业将在宾夕法尼亚州生产高压断路器。

该公司于 6 月 16 日表示，其子公司晓星 HICO 与 Quanta Services 的子公司签署协议，成立晓星 HICO Breaker，一家生产气体断路器的合资企业。

这家于7月成立的合资企业最早将于10月开始生产72.5千伏至800千伏的高压断路器。生产将在昆塔公司位于宾夕法尼亚州卡农斯堡的现有工厂进行。

Quanta Services是一家美国大型工程、采购和施工公司，专门从事电力和能源基础设施建设。其服务对象包括美国各地的公用事业公司、发电和储能项目、数据中心、电信运营商及其他客户。

此次合作将晓星集团的电力设备专业知识与广达集团的基础设施能力相结合，助力这家韩国公司扩大其在美国电力市场的份额。

晓星重工拥有超过50年的高压断路器生产经验，为40多个国家的客户提供设备。该公司于2011年进入美国市场，此后不断拓展业务，推出符合当地电力公司需求的定制产品。

该合资企业将使晓星重工成为第一家在美国建立变压器和高压断路器生产线的韩国电力设备制造商。

自去年以来，晓星集团董事长赵显俊一直致力于深化公司与广达能源的合作关系，以拓展其在美国的电力业务。两家公司还探讨了在先进电力技术领域的合作，包括直流（DC）解决方案。

Cho表示：“我们两家公司通过在各种项目上的合作建立了牢固的伙伴关系，从供应断路器和变电站设备到支持输电和可再生能源并网项目。”

“随着人工智能的快速发展，电网升级的需求日益增长，我们将借鉴在美国本土化运营中积累的经验。通过这家新的合资企业，我们旨在巩固晓星在美国电力市场作为整体解决方案提供商的地位。”

晓星重工位于田纳西州孟菲斯的超高压变压器工厂已成为其美国业务的关键组成部分。该公司已在该工厂投资约3亿美元，包括收购和持续扩建。目前的扩建工程完成后，该工厂预计将拥有美国最大的变压器产能之一。

今年早些时候，晓星重工与美国一家大型输电网运营商签订了一份价值约5.4亿美元的电力设备供应合同。该公司表示，这是迄今为止韩国电力设备制造商获得的最大此类合同。

据 Global Market Insights 预测，北美断路器市场将以 6.7% 的复合年增长率增长，从 2024 年的 48 亿美元增长到 2034 年的 96 亿美元。