... :short circuit,over load,overvoltage protect Main specification:1,Output Voltage/current:50V/40A2,Size:L200*W110* ... ,Short circuit protect:long-term7,Output start time:≤1.5S@230VAC8,Output keep time:≥20mS@230VAC9,Insulating ... -enclosure:DC500V,1min10,Work environment:0~45°C,20%~90%RH(no frost)11,Safey standard:EN60950, ... aging test,make the product have high reliability. LED display panel power supply