Integrated 400V inverters convert train energy to station power
The new 400V AC Station Energy Saving Inverter (S-EIV) can be used at train stations with high-load demands of 400V power distribution circuits, including stations serving urban Tokyo.
The 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 and the 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. The compatibility with 400V AC systems eliminates the existing 200V AC S-EIV’s step-up transformer and make it easier for railway companies to adopt S-EIVs for stations with large loads.