PA30B 型数字三相泄漏电流测试仪本系列仪器是专门用于测试三相三线/四线用电器具电源端与保护接地端之间的泄漏电流的检测。并对极限值可以预先设定，声光报警。
PA30B type digital three-phase leakage current tester main technical parameters: Measuring range: 0-2-20mA + 3% The alarm value: 0-20mA arbitrary value Each measurement time: 1-60S adjustable Test voltage: 0-450V continuously adjustable (three) Output capacity: 3/6/9/15kVA specifications (three) Switch mode: manual or automatic commutation Measurement methods: phase - turns or continuous phase, (the A phase - shell, B phase and C phase - shell - shell), two kinds of measurement methods