横联差动及和相电流保护装置无法正常投入原因分析

Analysis of abnormal service of parallel interlock differential and phase current protection device

通过实例计算证明并不是所有并列运行的双回线路都适于装设横联差动及和相电流延时速断保护装置;结合现场实际分析横联差动及和相电流延时速断保护装置在重负荷长线路双回线应用时无法正常投入原因。

Concrete example calculation shows that not all parallel interlock differential and phase current delay trip protection are suitable for application in all parallel dual loop lines.The reason for abnormal service of these protection systems are analyzed in the light of reality.