Applied to testing the performance parameters of the lightning protection elements such as metal oxide varistor(MOV) and gas discharge tube (GDT) and the insulation resistance (Mohm), polarization index (PI), dielectric absorption ratio (DAR). 1.Model No.:ETCR3800B 2. Initial action voltage test,Range:50~3000V 3. Leakage Current ,Range:0~1000μA 4 .DC breakdown voltage test,Range:50~3000V 5 .Insulation resistance Mohm test:Range:0.5~10GΩ 6. Power Supply : DC 7.4V 2600mAH rechargeable lithium battery