The difference between X and Y capacitors.

There is no essential difference between the function of X capacitor and Y capacitance. The difference lies in their connection. Can be divided into the following two points:

1. The difference is that the X capacitor is not grounded, and the Y capacitor must have a ground wire.

2. Most of the X capacitors are square box shape, and the Y capacitors are round plate porcelain interface.

More difference is that the X capacitance is connected to both ends of the input line to eliminate the difference mode interference, and the Y capacitor is connected between the input line and the ground wire to eliminate the common mode interference. X capacitor with encapsulation square high-pressure CBB capacitor, CBB capacitor not only has better electrical performance, and the power input end of the parallel can effectively reduce the influence of high frequency pulse of switch power supply. Y capacitors are usually made of high voltage ceramic plates. The Y capacitance is connected between the phase and the ground. The values of these capacitors are about a few nF in order not to exceed the ground lines defined by the relevant safety standards. In general, Y capacitors should be connected to wires with high noise interference. Y1 is a double insulated Y capacitor, which is used to span one secondary side.

The peak pulse voltage permitted in the application of safety grade of amperometric capacitance: under the X capacitor, it is divided into X1, X2 and X3. The main difference is: a. B. X2 is less than or equal to 2.5 kV; C. X3 high pressure resistance is less than or equal to 1.2 kV; Y capacitors are divided into Y1, Y2, Y3 and Y4, and the main difference is that: Y1 is greater than 8 kV. B. High pressure resistance of Y2 is greater than 5 kV; C. Y3 high pressure n/a resistance; D. Y4 high pressure is greater than 2.5kv.

There is no essential difference between the function of X capacitor and Y capacitor. The difference lies in their connection. The Y capacitor must have a ground wire, and the X capacitor is a square box. Y capacitance is a wafer ceramic interface, and X capacitance is connected to both ends of input line to eliminate differential mode interference. The Y capacitance is connected between the input line and the ground line to eliminate the common mode interference.