POWER SWITCHING DEVICE FOR PREVENTING ERROR OPERATION BY HIGH FREQUENCY CURRENT CONTACT AND DEVICE CUT OFF LEAKAGE OF ELECTRICITY THEREFOR

摘要

An electronic switching device for preventing operational errors caused by a high frequency, and an earth leakage breaker and method using the same can prevent the power supply from being cut off due to the high frequency by connecting primarily an N-phase switching contact due to a time difference between the N-phase switching contact and an R-phase switching contact of a power line, when the power supply is initially applied, if a leakage current over a set voltage is generated in an electric structure such as a street lamp, a traffic signal lamp or a steel pole or a submersion occurs.