Instruction/ maintenance manual of the product AN091802-1 Hitachi
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Application Note: Powering Inverters from a DC Supply Hitachi America, Ltd. AN091802-1 Please refer also to the Inverter Instruction Manual © 2002 Hitachi America, Ltd.
Powering Inverters from DC It is possible to power inverters from a DC Power source, or to connect the DC Bus of multiple inverters together to achieve energy savings, since inverters in power driving mode can use power from those that are in regeneration mode.
[2] DC voltage to be supplied Supplied DC voltage should be between the UV voltage and the OV voltage (or BRD ON level) of the inverter. Model name UV level BRD ON level OV level ( regen.) OV level (source) J100 200V class 140Vac ~ 160Vac (V-SET) +137.
Case 2 : DC Bus connected n parallel to a single AC-fed inverter Ø Pay attention to the selection of the main inverter (#1) because all the input current flows through the rectifier bridge of this inverter. (*2) Ø Need sufficient time for EEPROM to store the data.
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If you already are a holder of Hitachi AN091802-1, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hitachi AN091802-1.
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