... Three Phase Double Conversion Online Uninterruptible Power Supply Manufacturer 1.Brief introduction CHP3000 series UPS adopt the global most advanced DSP digital control ... life expectancyMCU control for reduction of components and simplified control circuitsImproved reliability by two methods ... 6. Our Competitors can refer to APC by Schneider, Liebert by EMERSON, Alpha, EATON, MGE, SIEMENS, ...