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一种可同时测量漏电保护器的漏电动作电流以及在这一电流下保护器开关的分断时间的数字式测试仪，其电流、时间测量范围分别为２．５～５００ｍＡ、０～９．９９９ｓ，测量精度取决于电流互感器的转换精度和放大器的线性度。
A digital tester capable of simultaneously measuring the leakage current of the earth leakage protector and the breaking time of the protector switch at the current has a current and time measuring range of 2.5 to 500 mA and 0 to 9.999 s respectively, Measurement accuracy depends on the current transformer conversion accuracy and amplifier linearity.