Point of action of safety capacitors between power lines

Safety capacitors have been known, but how can we find the safety capacitors in the circuit? Here, Ruican Electronics will tell you how to find the safety capacitors in the circuit.

First look for the power line, 220V AC, the safety capacitor is between the power line. Safety capacitors are used in applications where the capacitor does not cause an electric shock and does not endanger personal safety. It includes X and Y capacitors.

The x capacitor is a capacitor that is connected between the two lines (LN) of the power line. Generally, a metal film capacitor is used. The Y capacitor is a capacitor that is connected between the two lines of the power line and the ground (LE, NE), and is generally in pairs. . Based on the limitation of leakage current, the value of Y capacitor should not be too large. Generally, the X capacitor is uF grade, and the Y capacitor is nF grade. The X capacitor suppresses differential mode interference and the Y capacitor suppresses common mode interference.