PW-VP50 CT Polarity Checker
4
1. Brief Introduction
PW-VP50 CT polarity checker is the favorable meter which can be used for field CT
polarity test in power plants, substitution and any other application which may need to
check the polarity. There are 2 units included in PW-VP50. One master machine 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 analyze 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
machines.
This testing method is very simple, reliable and easy to operate. There are built-in battery
inside of the kits and very small size so the engineers can use it to quickly complete the
polarity detection work not only for CT, but also for the secondary protection circuit's
polarity check.
