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Mitsubishi expands lineup of integrated 400V AC-output station inverter

Mitsubishi expands lineup of integrated 400V AC-output station inverter

Mitsubishi Electric has announced that it would launch a new integrated Station Energy Saving Inverter (S-EIV) with 400V AC-output for converting surplus regenerative energy from train braking into AC electricity for station facilities. The new 400V AC S-EIV facilitates easy installations and more energy-efficient operations, even at train stations with high-load demands of 400V power distribution circuits. The company also announced that the new S-EIV will be installed at Tokyo Metro Co. Ltd. train stations serving urban Tokyo.

The new S-EIV offers 400V AC-output with the same dimensions as its 200V AC predecessor. Also, its new multifunctional step-up transformer acts as a filter reactor to reduce harmonics in AC output. Front access for easy cabling and maintenance enables diverse installation options. Reliability has been improved by adding protection and monitoring functions. A new earth-fault detection circuit quickly identifies unexpected current flows to the earth via the unit's enclosure due to degraded or damaged insulation, ensuring safe grid-interconnection and durability for outdoor, along with the enclosure's dustproof, splash-resistant and rust-resistant design. Improved monitoring of main circuit devices and grid voltage contribute to system stability and easy maintenance.

Compared to 200V AC systems, 400V AC systems are deployed for distribution circuits in stations with especially large loads to suppress voltage drops and reduce distribution loss, to efficiently power elevators or escalators. Due to its compatibility with 400V AC systems, the new model does away with the existing 200V AC S-EIV's step-up transformer. The new 400V AC S-EIV will make it easier for railway companies to adopt S-EIVs for stations with large loads. Mitsubishi Electric's new model and existing 200V and battery models offer a wide range of solutions.



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