... It adopts the digital control technology, of which the core is high-speed MCU and CPLD. It takes the ... first-class product. HT-HM series UPS be widely applied to the telecommunication, bank, stock exchange centre, transportation, electricity ... Nominal input frequency50Hz±10%,60Hz±10%ChargeCharge modeconstant current to constant voltage, with temp compensationBatteryBattery Typemaintenance-free lead ...