Analysis and Improve-measures on the Reason of a Wrong Tripping Caused by Relay Protection when a Charging up is made in A No-load Main Transformer

空充主变时保护误 跳闸原因分析及改进措施

Secondly the approach that switches the tripping equations to improve the tolerance of grounding resistance is not suitable when the zero sequence reactance relay is applied to double circuit lines or ring network .

零序电抗 继电器应用于双回线或环网时，不适宜用切换 动作方程的方法提高承受过渡电阻的能力。

An Analysis on Tripping of Generator ′ s Negative Sequence Protection Relay

发电机负序 保护 动作的分析