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Mitsubishi Electric's Power Distribution Systems Center Produces One Millionth Medium-Voltage Circuit Breaker

Mitsubishi Electric Corporation (TOKYO: 6503) announced today that the company’s Power Distribution Systems Center (PDSC) has produced its milestone one millionth medium-voltage circuit breaker in Marugame, Kagawa Prefecture, Japan in March.

Medium-voltage circuit breakers protect electric facilities and power distribution networks in buildings, factories and other industrial facilities by cutting off irregular current in the case of accidents such as lightning strikes to power networks.

Going forward, Mitsubishi Electric will continue to contribute to the safety and stability of power systems by developing and commercializing electricity technology for advanced industrialization and environmental protection, including the reduced use of hazardous substances based on RoHS standards.

The PDSC facility was established as the Marugame Factory in 1979 to produce medium-voltage circuit breakers, such as vacuum breakers and gas circuit breakers. Over the years, it has produced circuit breakers featuring high reliability, compactness and minimized maintenance. The PDSC’s cumulative shipments of circuit breakers units exceeded one million units in March 2014, the year marking the facility’s 35th anniversary. The one millionth unit was a VF-8/13 model 7.2kV vacuum circuit breaker, Mitsubishi Electric’s main circuit-breaker model. VF-8/13 shipments average more than 20,000 units per year and account for more than a 60% Japanese market share among models rated for voltages of 3.6/7.2kV and breaking currents of 8–12.5kA. The one million units have included 965,000 vacuum circuit breakers, 22,000 air- or magnet-circuit breakers and 13,000 gas circuit breakers.

Milestones in PDSC’s Production of Medium-voltage Circuit Breakers

1979 Marugame factory established and begins producing circuit breakers
1982 7.2kV VF-A series vacuum circuit breaker shipments begin
1991 12kV-80kA high-function gas circuit breaker shipments begin
1999 7.2kV high-speed vacuum circuit breaker shipments begin
2000 Cumulative production reaches 500,000 units
2004 7.2kV-type VF-D series vacuum circuit breaker shipments begin
2013 72/84kV dead-tank vacuum circuit breaker shipments begin

About Mitsubishi Electric Corporation

With over 90 years of experience in providing reliable, high-quality products, Mitsubishi Electric Corporation (TOKYO: 6503) is a recognized world leader in the manufacture, marketing and sales of electrical and electronic equipment used in information processing and communications, space development and satellite communications, consumer electronics, industrial technology, energy, transportation and building equipment. Embracing the spirit of its corporate statement, Changes for the Better, and its environmental statement, Eco Changes, Mitsubishi Electric endeavors to be a global, leading green company, enriching society with technology. The company recorded consolidated group sales of 3,567.1 billion yen (US$ 37.9 billion*) in the fiscal year ended March 31, 2013. For more information visit http://www.MitsubishiElectric.com

*At an exchange rate of 94 yen to the US dollar, the rate given by the Tokyo Foreign Exchange Market on March 31, 2013

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