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Transmission & Distribution

High-voltage Switchgear

Mitsubishi Electric gas-insulated switchgear (GIS) and gas circuit breakers (GCB) represent the best of modern technologies. Since commercializing Japan's first GCB in 1968, we have supplied a variety of circuit breakers and GIS rated from 72~1100kV.

Gas-insulated Switchgear (GIS)

The advantages of Mitsubishi Electric GIS are numerous including space savings, flexible designs, less field construction work (i.e., quicker installation time), minimal maintenance, and excellent reliability and safety.

300kV GIS

300kV GIS

550kV GIS

550kV GIS

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Hybrid Gas-insulated Substation (H-GIS)

550kV MITS (H-GIS)

550kV MITS (H-GIS)

Incorporating some of the latest technologies, our H-GIS are now smaller and more modular. As a result, the time required for updating GIS to be shortened.

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Gas Circuit Breakers (GCB)

550kV live tank GCB

550kV live tank GCB

550kV dead tank GCB

550kV dead tank GCB

Gas circuit breakers incorporated some of the latest technologies including thermal gas current analysis, which contributes to ensuring excellent product reliability.

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Generator Circuit Breakers (GMCB)

Generator Circuit Breakers (GMCB)

The GMCB is the primary circuit in power plants. Efforts are being made to modularize the circuit breakers, isolators and grounding switches with the aim of manufacturing smaller, more lightweight devices.

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Lightning Arresters

Lightning Arresters

Mitsubishi Electric produces various types of lighting arresters, such as the 500kV insulator-type for transformers.

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