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In July 2009, 400kVA marine shore power supply was successfully installed and commissioned in Zhangjiagang Jiusheng Shipbuilding and put into use. This power supply is a high-power 60Hz variable-frequency shore power supply specially designed and manufactured for the harsh use environment such as high temperature, high humidity, high corrosivity, heavy load, etc. Performance of the product: the rated capacity is 400KVA, the input is 380V/50Hz, the output is 440V-460V adjustable, and 60Hz high-quality frequency stabilized voltage stabilized power supply supplies power to export ships.