Noise terminal voltage

Harmonic noise voltage generated at the power input terminals, such as commercial outlets, when using electrical and electronic equipment. Since the noise terminal voltage is transmitted to the power supply side as noise and adversely affects other loads, it must be suppressed below the standard value. If an attempt is made to measure the noise terminal voltage directly, errors caused by the impedance of the power supply side circuit occur, making accurate measurement difficult. Therefore, in order to eliminate measurement errors caused by the impedance of the noise terminal voltage and to measure it accurately, a pseudo power supply network is connected between the commercial outlet and the electrical or electronic equipment for measurement.