Circuit breaker with external current transformer

The utility model provides a circuit breaker with an external current transformer, and the circuit breaker comprises a circuit breaker body which comprises a centrally-arranged rack and an arc extinguish chamber disposed on the centrally-arranged rack. The current transformer is arranged outside the circuit breaker body; the number of the supports is at least two, each support is used for supporting and fixing the current transformer and the centrally-arranged frame, each support comprises a first supporting leg, a second supporting leg and a connecting beam connected between the first supporting leg and the second supporting leg, the first supporting leg is located below the current transformer, and the second supporting leg is located below the centrally-arranged frame; the bottom ends of the first supporting leg and the second supporting leg are located in the same horizontal plane. According to the utility model, through arranging the novel support, the current transformer and the centrally-arranged frame