Abstract: An actuator is disposed on a face of a circuit breaker panel positioned at a switch lever of a circuit breaker for moving the switch lever. A shaft selectively moves between an extended position and a retracted positon. An arm extends substantially perpendicular to the shaft. A manually disconnectable coupling is between the shaft and the arm. The arm is configured to fit on the face in a position to automatically move the switch lever into an electrically open positon from an electrically closed position upon activation of the actuator. The manually disconnectable coupling disconnects the shaft from the arm before a user manually moves the switch lever back into the electrically closed position. The manually disconnectable coupling has a manually removable pin. The actuator is a liner actuator and can be a rotational actuator.

Abstract: An apparatus detects an E3 phase and E1 and E2 phases of an electromagnetic pulse (EMP). A pulse detector detects E1 and E2. A sustained level detector connects to a mains utility power supply line to detect E3. A delay timer holds an indication of a detected E1 or E2 for a predetermined time limit of about 10 minutes. A latch holds an indication that an EMP has occurred when an E3 occurs following an E1 or E2 within the predetermined time limit. An alarm indicates an EMP. A mechanical actuator disconnects the mains utility power supply line from utility power when an EMP is so indicated. The mechanical actuator can be mounted to a panel front face of a circuit breaker box in a configuration to push open a switch surface of a circuit breaker switch lever.