... conversion advanced DSP technology Introduction:Power Castle (America) Series Online HF UPS 4-10kva, is DSP controlled ... %(static load)Crest factor3:1Wave distortionLinear load <3%,Nonlinear load <5%Over load ability105%<load<125% for 1 mins ,125%<load<150% ... LED and LCD, clear & friendly display interfaceEfficiencyabove87%(full load)ProtectionOutput short circuit, Overload, Output low voltage, Battery ...