A BOARD CONNECTING APPARATUS FOR OVER CURRENT RELAY IN AN AIR CIRCUIT BREAKER

A board connecting apparatus for an over current relay in an air circuit breaker is provided to reduce time and processes for a connecting operation by simple connection among a sensor, a converter, and a sensor board and between the sensor board and a main board. A board connecting apparatus for an over current relay in an air circuit breaker includes a sensor board(2) and a main board(1). The sensor board is provided with a current sensor, a connector, and a plurality of projected electrical output units. The current sensor senses a conductive current on a circuit. The connector is connected to a power converter supplying a power source of the over current relay. The plurality of projected electrical output units provides the sensed conductive current provided from the current sensor and the power source from the power converter. The main board is provided with electrical connection hole units corresponding to the projected electrical output units of the sensor board. The main board is operated by the power source supplied from the sensor board. The main board determines whether an over current is applied on the circuit on the basis of the sensed conductive current. The main board outputs a driving signal when the over current is generated.