Current transformer secondary connecting line monitoring system and method for lightning arrester monitoring

The invention relates to a current transformer secondary connecting line monitoring system and method for lightning arrester monitoring, and belongs to the technical field of lightning arrester on-line monitoring. The current transformer secondary connecting line monitoring system comprises a memory and a CPU (central processing unit); the CPU is connected with the memory through a signal control line, and the CPU is connected with the power switch control circuit through a power on-off control signal line; the signal power supply is connected with the power switch control circuit; the lightning stroke sampling loop comprises a current transformer, and the current transformer comprises a current transformer secondary loop; a monitoring point is arranged at the connection position of the dotted terminal of the secondary circuit of the current transformer and the sampling resistor R2; and the CPU acquires monitoring point signals through the signal sampling circuit within the conduction time. The system has the