X capacitance and Y capacitance meaning: X capacitance and Y capacitance collectively referred to as safety capacitance, safety capacitance is used for such occasions, that is, capacitor failure, will not lead to electric shock, does not jeopardize personal safety.X and Y capacitance is the difference between X capacitance is connected to the two ends of the input line is used to eliminate the differential mode interference, Y capacitance is connected to the input line and the ground line is used to eliminate the interference of **** mode.
Y capacitor --- often used high-voltage ceramic tiles. Y-type capacitor connected between the phase line and ground. In order not to exceed the permissible leakage value of the ground line limited by the relevant safety standards, the value of these capacitors is about a few nF. Generally, Y capacitors should be connected to the conductor where the noise interference is larger. Y1 belongs to the double insulated Y capacitors, used to cross the primary and secondary sides. Y2 belongs to the basic single-insulated Y capacitors, used to cross the primary side of the protection of the earth, i.e., the FG line.
Expanded information:
Capacitor, consists of two metal poles, sandwiched by insulating material (dielectric). Composition. Due to the different insulating materials, the composition of the capacitor type is different: according to the structure can be divided into: fixed capacitance, variable capacitance, fine-tuning capacitance. According to the dielectric material can be divided into: gas dielectric capacitors, liquid dielectric capacitors, inorganic solid dielectric capacitors, organic solid dielectric capacitors electrolytic capacitors. According to the polarity is divided into: polarized capacitors and non-polarized capacitors. The most common thing we see is the electrolytic capacitor. Capacitors in the circuit has the role of isolation of direct current, through the role of alternating current, so commonly used in interstage coupling, filtering, decoupling, bypass and signal tuning.