Control circuit for preventing tripping and closing coil of circuit breaker from being burnt out

The invention discloses a control circuit for preventing a tripping and closing coil of a circuit breaker from being burnt out. The control circuit comprises a tripping loop and a closing loop, wherein the tripping loop and the closing loop are respectively connected in series into a loop formed by connecting a time relay and an auxiliary normally-closed node thereof in parallel. The circuit breaker tripping and closing coil can be prevented from being burnt out due to overlong current duration time, so that equipment is saved, the workload of a power transformation maintenance group, a relay protection group and a high-voltage test group of a power transformation management station can be greatly reduced, human resources are saved, and the working efficiency is improved. 本发明公开了一种防止断路器跳合闸线圈烧坏的控制电路，包括跳闸回路和合闸回路，跳闸回路和合闸回路均分别串入由时间继电器与其辅助常闭节点并联的回路。本发明可防止断路器跳合闸线圈由于电流持续时间过长而烧坏，从而节约设备，可大大减少变电管理所变电检修班、继电保护班、高压试验班的工作量，节约人力资源，提高工作效率。