Commercialization of the 145kV Gas-Insulated Switchgear (V-GIS) for Overseas Market

摘要

We have been working on product development for Vacuum Circuit-Breakers (VCBs). Since the VCB performs current interruption under a vacuum and it does not use any sulfur hexafluoride (SF_6), it offers outstanding features such as excellent environmental performance, easy maintenance and inspection, and a long operational life. Because of these attractive features, high-voltage and large-capacity versions are preferred. We developed 84kV VCBs in the 1970s and 145kV VCBs (single break) in 2010. This was the world's first achievement of its kind. As a spring-board in the expanding application of high-voltage VCBs, we developed a Gas-Insulated Switchgear with a VCB (V-GIS). It has a VCB of 145kV rating. The first product was delivered in 2016 and the second product was delivered in 2017 to an ASEAN market. This V-GIS has attracted worldwide attention and been recognized as a 145kV GIS with the world's first single break VCBs. We expect more orders for this product in the future.