ZC-320 type leakage protector tester is mainly used to test the leakage action current, leakage current and leakage action time, testing current is divided into ten files for 0-500mA, the test range of time 0-799ms, 16 character type liquid crystal display screen.It is the best instrument for a variety of leakage protection device on-site or indoor testing, hand-held, small size, light weight, easy to carry.