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零序过流保护
零序过流保护
Zero sequence over current protection
零序、正序、负序是进行电路分析时人为的将要分析的量分解成三个分量。一般同一个回路的导线全部穿过同一个电流互感器（也叫零序互感器）时，互感器的次级没有输出，也就是该回路零序电流为零。当线路出现漏电时（漏电发生在互感器以下），穿过互感器的电流矢量和不再为零，互感器次级就会有输出电流，利用这个原理可以进行漏电保护。
Zero sequence, positive sequence and negative sequence are artificially decomposed into three components in circuit analysis. Generally, when all wires of the same circuit pass through the same current transformer (also called zero sequence transformer), the secondary of the transformer has no output, that is, the zero sequence current of the circuit is zero. When the line leakage occurs (leakage occurs below the transformer), the sum of the current vector passing through the transformer is no longer zero, and the secondary transformer will have output current. This principle can be used for leakage protection.
Zero sequence over current protection
零序、正序、负序是进行电路分析时人为的将要分析的量分解成三个分量。一般同一个回路的导线全部穿过同一个电流互感器（也叫零序互感器）时，互感器的次级没有输出，也就是该回路零序电流为零。当线路出现漏电时（漏电发生在互感器以下），穿过互感器的电流矢量和不再为零，互感器次级就会有输出电流，利用这个原理可以进行漏电保护。
Zero sequence, positive sequence and negative sequence are artificially decomposed into three components in circuit analysis. Generally, when all wires of the same circuit pass through the same current transformer (also called zero sequence transformer), the secondary of the transformer has no output, that is, the zero sequence current of the circuit is zero. When the line leakage occurs (leakage occurs below the transformer), the sum of the current vector passing through the transformer is no longer zero, and the secondary transformer will have output current. This principle can be used for leakage protection.
