... software Most authority CB tester in China Description:DC circuit breaker tester set is used for mechanical ... itself or external computer by USB interface-With large color LCD, test curves can be displayed in ... tested action: Open/Close of CB’s contacts, DC motor rotation for CB spring stretch.-Universal sensor clamp, ... 5 cores, 1 piece-DC power cable for CB O/C and DC motor, 1 set-Signal cable connecting ...