Mainly used in the phase verification and phase sequence verification of power lines and substations. It has the functions of phase verification, phase sequence measurement, electricity verification and other functions. It has strong anti-interference performance and conforms to(EMC)Standard requirements, adapt to various electromagnetic interference occasions. The measured high voltage phase signal is taken out by the collector, and directly transmitted after processing. Received by the nuclear phase analyzer and phase comparison, the qualitative results after the nuclear phase. It is safe, reliable, fast and accurate, and adapts to various nuclear phase occasions. This product is safe, reliable, stable in performance, and easy to operate. It is an ideal nuclear phase instrument.