The use of wireless secondary phase detector significantly reduces the manpower and time
but it is insufficient in intelligent analysis.The instrument cannot provide effective guidance for staff in error situations.This paper summarizes three kinds of typical errors including wrong connection of phase line and neutral line
two phase lines and three phase line.This paper presents a progressive intelligent method for the sampled data according to the amplitude
symmetry
phase sequence and phase.The feedback information of each link can provide guidance for operators.