ISOLATION CURCUIT OF OVER-VOLTAGE

摘要

PURPOSE: An isolation circuit of an over-voltage is provided to protect a compressor from the over-voltage by isolating the circuit fed to the compressor when detecting the over-voltage from the power unit of a refrigerator. CONSTITUTION: The isolation circuit of the over-voltage has:a micomputer(10) to output a certain control signal when detecting an over-voltage by detecting the over-voltage fed from an interchange current of a converter(50) of a refrigerator; an isolation circuit(20) turn off a relay switch(30) fed to a compressor(40) of the refrigerator when feeding the certain control signal from the micomputer(10).