... , long lifespan, and low defect rate(<1%).6,Stable output frequency without Hertzian waves.7,Self- ... 16V open 9,Under-Voltage protection:lower than 6.5V closed,higher than 8.5Vopen10,Short-Circuit ... per carton size:380*340*460(mm),Weight:24.70 KG.4. Submitted to tests as below: 1 ... Over voltage protection test. 5) Flash light concussion test. 6) Quakeproof capability test. 7) Cold & warm boot test. ...