Abstract: The present invention relates to an electrical connector having a shorting bar and an operation device for controlling the shorting bar. The connector has a housing and electrical conductive terminals disposed in the housing. One or more metal shorting bars are attached to the housing, each shorting bar electrically connects two or more terminals as a protective measure to the systems connected to these terminals before the connector is connected to a counterpart connector. The operation device is movably disposed inside the housing. During the connecting process, the operation device is pushed by the counterpart connector to move relative to the housing towards the shorting bar. Upon completion of the connecting process, a portion of the operation device is inserted between the shorting bars and the terminals whereby the shorting bar are electrically isolated from the terminals to resume the original functions of these terminals.