... 2.3 Protection function· Input soft-start, Over-voltage protection. Current-limited protection, Overheat protection ,Short-circuit ... standard cabinet· DC input: Rated input voltage: 48V· Operating voltage: 40V-50V· Starting voltage: 42V-57V · AC output: Nominal ... factor (PF): ≥0.8 · Protection function: input low-voltage protection, input overvoltage protection , output overload protection, output ...