JCMZ-102型母差保护装置的异常分析及防范措施

Analysis and measures against the abnormal operation of type JCMZ-102 differential bus protection

JCMZ 10 2 (D2 3)母差保护装置 ,安装时由于变更了原理接线图中的接线 ,错误地使用了PLP0 1 2 2线路保护装置中的一组YQJ备用触点 ,从而造成D2 3装置CT三次电流不能自动切换 ,同时引起该装置不能自动互联等异常现象 ,并进行了分析说明 ,提出了改进措施。

The third current of device D23 can not be switched over and some abnormal cases are brought out such as the device can not internet automatically because the wiring modes are different from the principle wiring during installing , and a sets of spared contacts YQJ in the line protection device PLP01-22 are miss used. It is analyzed in this paper and an improvement is proposed.