Please ask Indian safety regulations

According to IEC 60384-14, capacitors are divided into X-capacitance and Y-capacitance, 1. X-capacitance refers to capacitors spanning between L-N, 2. Y-capacitance refers to capacitors spanning between L-G/N-G. (L=Line, N=Neutral, G=Ground). (L=Line, N=Neutral, G=Ground) X capacitor is divided into X1, X2, X3, the main difference is: 1. X1 withstand high voltage greater than 2.5 kV, less than or equal to 4 kV, 2. X2 withstand high voltage less than or equal to 2.5 kV, 3. X3 withstand high voltage less than or equal to 1.2 kV. Y capacitors are divided into Y1, Y2, Y3, Y4, the main difference is: 1. Y1, Y2, Y3, Y4, Y4, Y4, Y4, Y4, Y1, Y4, Y1, Y4, Y4, Y4, Y4. The main differences are: 1. Y1 withstand high voltage greater than 8 kV, 2. Y2 withstand high voltage greater than 5 kV, 3. Y3 withstand high voltage n/a 4. Y4 withstand high voltage greater than 2.5 kV X, Y capacitors are safety capacitors, between the firewire and zero line is the X capacitance, between the firewire and ground is the Y capacitance. They are used in the power filter, play a role in power filtering, respectively, on the **** mode, differential mode interference filtering effect. Safety capacitors are used for such occasions, that is, after the failure of the capacitor will not lead to electric shock, does not jeopardize personal safety. Safety Classification of Safety Capacitors Peak Impulse Voltage Allowable in Application Overvoltage Class (IEC664) X1 >2.5kV ≤4.0kV Ⅲ X2 ≤2.5kV Ⅱ X3 ≤1.2kV -- Safety Classification of Safety Capacitors Insulation Type Rated Voltage Range Y1 Double or Reinforced Insulation ≥ 250V Y2 Basic insulation or additional insulation ≥150V ≤250V Y3 Basic insulation or additional insulation ≥150V ≤250V Y4 Basic insulation or additional insulation <150V The capacitance of the Y capacitor must be limited to achieve the purpose of controlling the magnitude of the leakage current flowing through it and the impact on the EMC performance of the system under the action of the rated frequency and rated voltage. Y capacitor capacity should not be greater than 0.1uF. Y capacitor in addition to meet the corresponding grid voltage withstand voltage, but also requires that this capacitor in the electrical and mechanical properties have enough safety margin, to avoid the extreme environmental conditions in the short-circuit breakdown phenomenon, Y capacitor voltage withstand performance is important for the protection of personal safety in the filtering circuit on the X capacitance, that is, the span of the L-N line; Y capacitance is the N-G line. In the safety standards in accordance with the pulse voltage points X1, X2, X3 capacitors; according to the insulation level to points Y1, Y2, Y3 to points. (These are not according to what material to be divided, learn more later.) As for the safety standards of various countries have some differences, but the rated voltage is nothing more than 250 and 400. Various manufacturers do safety capacitors is to meet the needs of this safety standard, a safety capacitor can meet the requirements of the Y capacitance can be made to meet the requirements of the X capacitance. So there are safety capacitors labeled X1Y1, X1Y2 ... Firewire and 0 line connected to a capacitor is X, while the firewire and ground line connected to a capacitor like a Y. Due to the direct capacitance of the firewire and 0 line, by the impact of voltage peaks, to avoid short-circuiting, pay more attention to the parameters is the withstand voltage level, there is no limit on the capacitance of the value of the value of the limit value. Firewire and ground direct capacitance to be involved in leakage safety issues, so it focuses on the parameters is the insulation level, as james bai said, too large a capacitance capacitance will be in the power supply after the power outage of the human impact on the device.