Polarity tester PW-VP50

phasepowerfor single- and 3-phase equipment

PW-VP50 CT Polarity checker is the favorable meter which can be used for field CT and transformer polarity test in power plants, substations and any other application which may need to check the polarity. There are 2 units included in PW-VP50. One master machine which can automatically inject high-precision pulse current with adjustable amplitude and period to the primary side of CT, three-phase at the same time. The other slave machine will receive and analysis the waveform of induced pulse current at the secondary side so as to judge the polarity is positive or negative automatically by the LED indicator on the kits. This testing method is very simple, reliable and easy to use. There are built-in battery inside the kits and very small size so that engineer can use it to quickly complete the polarity detection work not only for CT, but also the the secondary protection relay circuit’s polarity check. Product Feature ● The master machine supports both single pulse trigger mode and cyclic pulse trigger mode. The sending period and current amplitude of pulse can be set freely, and three-phase output or single-phase output mode can be also selected. ● The slave machine is connected to each secondary terminal of CT one by one, and the slave machine will automatically collect the waveform of induced pulse current for auto-judgment. ● The test result, CT polarity, will be indicated through the indicator light and buzzer. ● PW-VP50 adopts special design of constant current output mode so that it is with high load capacity.