Patent ID: 9347977
Filing Date: 2016-05-24
CPC Classification: G01D,G01R,Y02B,Y04S

Claim Text:
1. A connection error detection device for detecting a connection error for each rating in a smart meter, comprising: a parameter calculation unit configured to calculate connection error detection parameters including voltage root-mean-square (RMS) values, current RMS values, active energy values and reactive energy values for three phases; and a connection error determination unit configured to set a connection error detection criterion for detecting a connection error for each rating in the smart meter, and to detect the connection error for each rating by determining whether any one of the connection error detection parameters meets the connection error detection criterion, wherein the connection error detection criterion is set to any one of a case where active energy values for any one or more phases are measured in a negative direction, a case where a voltage RMS value for any one phase is a first percentage or less or a second percentage or more of an average rated voltage for remaining two phases, the second percentage being higher than the first percentage, and a case where active and reactive energy values for any one or more phases are all measured in a positive direction.