47. (3) isolation transformer and the low-pass filter junction isolation transformer and the wiring between the low-pass filter as shown in FIG. Figure (b) is a low-pass filter forms.
Figure, Li ~ L4 take several to several tens of mH, Ci, C2 take 0.47 ~ 211F; C: i take Ol ~ lyF; R. The pressure-sensitive resistors take UlruA about 1.3-1.5 times the nominal voltage of the power supply of the rated voltage, flow capacity 1-3kA. Isolation transformer and low-pass filter wiring.