The operation and maintenance personnel in an actual substation discovered abnormal secondary voltage of PT,promptly investigated and determined the fault range,implemented a reverse switch operation to isolate the fault and re-store operation of the intact equipment.The test showed a over-limit SF6 gas content in the gas chamber of the faulty e-quipment,and the disassembly inspection found that the L2 conductor rod and coil connection head were burned.The rea-sons for the anomaly have then been analyzed,and precautions and preventive measures have been proposed,which may contain useful information for avoiding similar faults.
NETL
NSTL
万方数据
