... ,smaill size ,high efficiency.2.With constant voltage and constant current(accuracy ≤1% ),output voltage stepless adjustable,ripple factor ≤1%, can be ... We can provide:The digital timer alarm system;Ampere-hour meter;RS485 or RS232 standard interface 4-20MA,0-5V control ... four-wire) 415V AC 50-60HZOutput DC current20A,50A,250A,300A,400A Arbitrary choiceOutput DC voltage50V,250V,300V,500V,600V Arbitrary ...