Abstract: A circuit breaker includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip mechanism. The trip mechanism includes a sensor structured to sense current flowing through the separable contacts, a processor cooperating with the sensor to determine a plurality of different trip conditions responsive to the sensed current, a nonvolatile memory operatively associated with the processor, and a trip actuator cooperating with the processor and the operating mechanism to trip open the separable contacts responsive to one of the different trip conditions from the processor. The processor is structured to save in and retrieve from the nonvolatile memory cause-of-trip information for the different trip conditions including the one of the different trip conditions.

Abstract: A circuit breaker includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip mechanism. The trip mechanism includes a sensor structured to sense current flowing through the separable contacts, a processor cooperating with the sensor to determine a plurality of different trip conditions responsive to the sensed current, a nonvolatile memory operatively associated with the processor, and a trip actuator cooperating with the processor and the operating mechanism to trip open the separable contacts responsive to one of the different trip conditions from the processor. The processor is structured to save in and retrieve from the nonvolatile memory cause-of-trip information for the different trip conditions including the one of the different trip conditions.

Abstract: A display device includes a first communication port communicating with a host device, a second communication port communicating with plural slave devices, and a processor circuit including a processor, an interface to the first and second ports and a display. A communication routine cooperates with the processor circuit. The routine includes a first mode of operation that receives a first message from the host device to the first port and repeats the same from the second port to a first slave device, and receives a second message from the first slave device to the second port and repeats the same from the second port to the host device. A second mode interrupts the first mode, sends third messages from the second port to a second slave device, receives fourth messages including information from the second slave device to the second port, and outputs the information to the display.