安全コンデンサはXタイプとYタイプに分けられる。

安全コンデンサはXタイプとYタイプに分かれる。AC電源入力は3端子に分かれています：L=ライン、N=ニュートラル、G=グランド）。L-N "の間、すなわち "ファイヤーゼロ "はXコンデンサであり、"L-G/N-G "の間、すなわち "ファイヤーグラウンド "または "ゼログラウンド "はXコンデンサである。X "のようなコンデンサに接続されたファイアワイヤとゼロラインの間、および "Y "のようなコンデンサに接続されたファイアワイヤとアース線の間、これらはどのような材料によって分割されていません。

Safety standard capacitor

X capacitor: Because the location of this capacitor is also critical, it also needs to comply with the relevant safety standards, and X capacitor is also one of the safety capacitors. According to the actual needs, the capacitance of X capacitor is allowed to be larger than the capacitance of Y capacitor, but at this time, a safety resistor must be connected in parallel to both ends of X capacitor, which is used to prevent the power cord from being unplugged, due to the charging and discharging process of the capacitor and the power cord plug is charged for a long time. Safety standards, when the machine is working in the power cord is unplugged, in two seconds, the power cord plug voltage charged at both ends (or potential to ground) must be less than 30% of the original rated working voltage.

安全コンデンサの一つであるXコンデンサは、安全試験機関の認定を受ける必要があります。一般にXコンデンサには安全認証マークが貼付され、耐圧はAC250VまたはAC275Vとなっていますが、実際の直流耐圧は2000V以上ありますので、公称耐圧がAC250VまたはDC400Vの一般的なコンデンサで代用しないでください。

通常、Xコンデンサにはリップル電流の大きいマイラーフィルム型コンデンサが使用される。このタイプのコンデンサはサイズが大きいが、瞬時充放電電流も大きく、内部抵抗も小さい。

2kv-1000uf Magnetizer のコンデンサー脈拍のコンデンサー高電圧 Magnetizer のコンデンサー

Y capacitors: The two Y capacitors are connected in critical positions and must comply with the relevant safety standards to prevent leakage from electronic devices or electrically charged cases, which can easily endanger personal safety and lives. They are safety capacitors, which require the capacitance value not to be large, and the withstand voltage must be high. Therefore, the total capacity of Y capacitor should not exceed 4700PF (472).

GJB151 stipulates that the capacity of Y capacitor should be no more than 0.1uF. In addition to conforming to the corresponding grid voltage withstand voltage, Y capacitors are required to have sufficient safety margin in electrical and mechanical performance to avoid The voltage withstand performance of Y capacitor is important to protect personal safety.　Y capacitors are mostly orange or blue in appearance, and are generally marked with safety certification marks (such as UL, CSA, etc.) and withstand voltage of AC250V or AC275V. However, the true DC withstand voltage is up to 5000V or more. It must be emphasized that Y capacitors should not be used in place of ordinary capacitors with nominal withstand voltage of AC250V or DC400V.

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