... test of CT&PT. ApplicationIt is mainly used to detect on phase error, ratio error, burden and ... AC220V and battery power.2. It can be used to detect burden, admittance, ratio error and phase error ... very simple, only 8 test terminals are needed to finish all testing items.4. Rotation controller, 320*240 ... groups of test results, which will not loss after power down.7. USB communication interface for USB ...