T&D

High-Voltage Circuit Breaker Eliminates Shunt Capacitance

ABB has released a new 145-kV high-voltage circuit breaker. The 145PM63-B high-voltage circuit breaker uses a new high-performance interrupter to serve 121-145 kV applications at 40-, 50-, and 63-kA ...

Hyosung Heavy Industries to Establish First U.S. Ultra-High Voltage Circuit Breaker Production Base... Full-Scale Production Begins in October

Hyosung Heavy Industries is making a decisive move into the U.S. power market by establishing a production base for ...
T&D

NEMA Publishes AC High-Voltage Circuit Breakers Standard

The National Electrical Manufacturers Association (NEMA) has published SG 4-2009 Alternating Current High-Voltage Circuit Breakers. The standard, which NEMA published under license from IEEE, was ...

HYBRID MVDC CIRCUIT BREAKER OPENS UNDER FULL VOLTAGE AND CURRENT

Diversified Technologies, Inc. (DTI) has introduced a new hybrid MVDC 5 to 20 kV circuit breaker that combines mechanical contacts and solid state switches to permit the safe use DC for ships and data ...

Quanta Services (PWR) Joins Hyosung HICO To Build High Voltage Breakers In The US

Quanta Services (NYSE:PWR) and Hyosung HICO formed a new joint venture, HYOSUNG HICO BREAKER, LLC, to manufacture ...

South Korea's Hyosung expands U.S. power equipment production

Hyosung is expanding its presence in the U.S. power equipment market by establishing a local production base for ...

Hyosung Heavy Industries Forms U.S. Joint Venture to Produce High-Voltage Circuit Breakers

Chairman Cho continues to deepen Hyosung's partnership with Quanta as the company expands its presence in the U.S. power market.SEOUL, South Korea and MEMPHIS, Tenn., June 22, 2026 /PRNewswire/ ...