ZERO-PHARSE HARMONIC REDUCTION DEVICE HAVING PROTECTION FUNCTION OF OVERLOAD

摘要

A zero-phase harmonic reduction device having a protection function of overload is provided to be operated efficiently by having a temperature switch operated according to a temperature of an iron core and a coil. In a zero-phase harmonic reduction device(20) having a protection function of overload, a plurality of feeder MCCBs(Molded Case Circuit-Breakers) are connected to a power distribution board(10). Three-phases(A,B,C) and a neutral line(N) of a power source are connected to phase lines(A,B,C) and a neutral line(N) of a connection transformer of the zero-phase harmonic reduction device through an MCCB1 of the power distribution board. A cutoff switch(TS1) is interposed in the neutral line of the connection transformer. The cutoff switch is a bimetal to be opened over a standard temperature and shorted below the standard temperature.