Arc light protection system for middle-low-voltage busbar

The utility model discloses an arc light protection system for a middle-low-voltage busbar. The arc light protection system comprises a main control unit, wherein the input end of the main control unit is connected with at least one auxiliary unit; the output end of the main control unit is connected with at least one circuit breaker; each auxiliary unit is connected with an arc light unit; a current unit is connected with a temperature unit; the arc light unit is connected with an arc light sensor; the current unit is connected with a current sensor; and the temperature unit is connected with the temperature sensor. The sensitivity range of the arc light protection system provided by the utility model can be regulated between the arc light unit and the main control unit, and the sensitivity of the arc light protection system is influenced by the arc light sensor and the length of optical fiber and can be regulated within the range of 10-50 KLUX; and by virtue of the arc light protection, the fault of the middle-low-voltage busbar can be rapidly removed, and thus the safety operation of a transmission and distribution power grid can be ensured.