... ,Alarm Systemdisplay accuracyLED displaydigital frequency meter:0.1HZ,digital power meter:0.1Wdigital voltage meter:0.1V,digital current ... uses coating solidification processing; The sine wave filter, the output transformer use the vacuum impregnation insulating paint and spray coating ... processing, the protection are up to IP55. 45kva shore power 3 phase marine power supply and frequency converter