Siemens Energy and Mitsubishi Electric signed a Memorandum of Understanding (MoU) to conduct a feasibility study on the joint development of a zero global warming potential (GWP) high-voltage switch solution, which uses clean air to replace greenhouse gases for insulation. The two companies will study ways to apply clean air insulation technology to higher voltages. They will start with a 245 kV dead-box circuit breaker that will accelerate the availability of climate-neutral high-voltage switching solutions for customers worldwide. The two parties will continue to independently manufacture, sell and maintain switchgear solutions.
In most substations in the world, sulfur hexafluoride (SF6)-the world's most powerful greenhouse gas with a global warming potential of approximately 23,500 times that of carbon dioxide-remains the insulating gas of choice. Even if the number of leaks is very small, the impact on global warming is huge. Given the driving force for global decarbonization, as operators seek future-oriented technologies that can significantly reduce their system's carbon footprint, the demand for alternatives is growing. At the same time, regulations aimed at reducing or prohibiting the use of fluorinated gases in the electrical industry are being reviewed and implemented around the world.
Siemens Energy and Mitsubishi Electric are pioneers in developing high-voltage switch solutions. The two companies have been committed to developing SF6-free gas-insulated switch solutions, replacing greenhouse gases with clean air (a pure mixture of nitrogen and oxygen) in order to achieve the global carbon neutral goal. So far, clean air insulation is the only alternative to greenhouse gases, so health and safety risks are zero. Combined with the vacuum interrupter, even compared with all known SF6 circuit breakers, it can ensure higher switching performance.
Siemens Energy's Blue Portfolio provides future-oriented environmental solutions for high-voltage power transmission. It includes non-fluorine gas gas insulated switchgear, circuit breakers and transformers. The combination of vacuum switch technology and clean air insulation can significantly reduce emissions without affecting the life of the product. Although circuit breakers using clean air and vacuum switching technology have been available for at least 15 years at voltage levels as high as 72.5 kV, their excellent technical performance and low life cycle cost also make them a perfect choice for other substation products, including gas- Insulated switchgear up to 145 kV has absolutely zero carbon dioxide equivalent emissions during the entire life cycle of the equipment. Siemens Energy's Blue products are not within the scope of any possible fluorine-containing gas regulations.
Mitsubishi Electric provides a variety of high and medium voltage products to ensure the safe and reliable operation of modern power grids. With its most advanced industry-best vacuum interruption and dry air insulation technology, Mitsubishi Electric contributes to society by providing (no SF6) and zero carbon dioxide equivalent emissions, energy saving and low life cycle-cost solutions. Mitsubishi Electric has been manufacturing high-quality vacuum tubes and products since 1965, and began supplying its 72.5 kV vacuum interrupter in 2002. The company is expanding its extensive experience in vacuum and dry air technology to create a new lineup of circuit breakers and switchgear products with higher voltages.
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