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GCB Gas-Insulated-Substations Storage Manufacturers

Historical Review Switchgear | Electrical Substation ... already mentioned, among all gas insulated equipment in Japan, GCB lead the development. At the beginning of GCB in 1970, the rating of puffer breaker was only 72 kV, but soon 550 kV, 63 kA GCB was developed fi rst with four breaks, then two breaks, and fi nally one break. The last one shown in Fig. 9 was commissioned in 1994 [5].

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