A signal feedback device used for an automotive locking apparatus is provided, comprising a car power supply, a motor, a transmission, an actuating lever, a signal feedback module, and a body control module. The signal feedback module is provided with a first feedback circuit, a second feedback circuit, and a third feedback circuit. The first feedback circuit is connected in series to a first resistor and a first on-off switch. The second feedback circuit is connected in series to a second resistor and a second on-off switch. The third feedback circuit is connected in series to a third resistor. The actuating lever is provided with a touch spot, and the corresponding circuits are turned on under driving of linear movement of the actuating lever, to provide different signal feedbacks. When the locking apparatus is abnormal or is powered off, an abnormal state signal can be detected, and the body control module can make logic judgment under the different states according to different measured resistance values, so that the situation of misjudgment caused by confusion of signals is avoided.

A method of determining if a circuit interrupter operating mechanism has an acceptable trip margin includes determining a model trip margin, providing a circuit interrupter, the circuit interrupter disposed in situ, the circuit interrupter including an operating mechanism, determining a circuit interrupter trip margin by: providing an internal sensor assembly, the internal trip margin sensor assembly structured to record trip margin data, providing a transfer function module, providing a computer structured to execute the transfer function module, executing the transfer function module on the computer, utilizing the trip margin sensor assembly to generate trip margin data, transmitting the trip margin data to the transfer function module, processing the trip margin data to generate a trip margin, and determining if the trip margin is acceptable relative to the model trip margin.

A smart accessory device includes an actuator and is designed to be used to actuate an operating mechanism of a circuit breaker in order to either open or close the separable contacts of the circuit breaker. The accessory can be one of a shunt trip, spring release, or under voltage release device. The actuator includes a solenoid and plunger. The accessory determines the operating condition of the actuator based on how much current flows through the coil when the power source provides power to the accessory device, and continually executes a coil diagnostic to determine the operating condition of the coil while power is being provided to the accessory device. If the accessory fails to trip the circuit breaker when required, the accessory can determine whether the failure was due to either of the solenoid or the plunger.

A smart accessory device is designed to be used with a circuit breaker so as to be able to actuate an operating mechanism of the circuit breaker in order to either open or close the separable contacts of the circuit breaker. The accessory device can be one of a shunt trip, spring release, or under voltage release device. The accessory device continually executes diagnostics to determine whether the power being supplied by an external power source is sufficient to enable the accessory device to actuate the operating mechanism of the associated circuit breaker. If the accessory device determines that the power being supplied by the external source is insufficient, the device triggers an alarm in order to notify a user that the power source is not meeting the power requirements of the device.

A relay temperature measuring device is provided. The device includes a sensor that measures an output of a battery and generates output measurement information and one or more relays that are disposed on a conductive line between the battery and a load. Additionally, a controller compares a relay temperature calculated using both-end measurement power information generated by measuring both ends of a conductor in a vehicle and the output measurement information with a preset temperature reference value, and connects or disconnects the relays based on a comparison result.

An electromechanical relay is provided with a housing, a relay assembly within the housing, and a data collection cover enclosing the relay assembly within the housing. The data collection cover includes sensing members that extend in toward the relay assembly and engage disconnect switches of the relay assembly. The sensing members transmit analog signals to an analog-to-digital converter that converts analog signals to digital signals. The cover then stores, displays and/or communicates the digital information.

A circuit interrupting device including one or more line terminals for connecting to an external power supply, one or more load terminals for connecting to an external load, one or more contacts electrically connecting one or more line terminals to one or more load terminals, and an auto-monitoring circuit. The auto-monitoring circuit configured to monitor one or more signals to determine an operating state of said circuit interrupting device, output a first signal having a first voltage level based on the operating state, wherein the first voltage level is greater than zero volts, and output a second signal having a second voltage level based on the operating state, wherein the second voltage level is greater than the first voltage level.

A relay temperature measuring device is provided. The device includes a sensor that measures an output of a battery and generates output measurement information and one or more relays that are disposed on a conductive line between the battery and a load. Additionally, a controller compares a relay temperature calculated using both-end measurement power information generated by measuring both ends of a conductor in a vehicle and the output measurement information with a preset temperature reference value, and connects or disconnects the relays based on a comparison result.

A signal feedback device used for an automotive locking apparatus is provided, comprising a car power supply, a motor, a transmission, an actuating lever, a signal feedback module, and a body control module. The signal feedback module is provided with a first feedback circuit, a second feedback circuit, and a third feedback circuit. The first feedback circuit is connected in series to a first resistor and a first on-off switch. The second feedback circuit is connected in series to a second resistor and a second on-off switch. The third feedback circuit is connected in series to a third resistor. The actuating lever is provided with a touch spot, and the corresponding circuits are turned on under driving of linear movement of the actuating lever, to provide different signal feedbacks. When the locking apparatus is abnormal or is powered off, an abnormal state signal can be detected, and the body control module can make logic judgment under the different states according to different measured resistance values, so that the situation of misjudgment caused by confusion of signals is avoided.

A circuit interrupting device including one or more line terminals for connecting to an external power supply, one or more load terminals for connecting to an external load, one or more contacts electrically connecting one or more line terminals to one or more load terminals; and an auto-monitoring circuit. The auto-monitoring circuit continuously monitoring one or more signals to determine an operating state of said circuit interrupting device. Wherein if said auto-monitoring circuit determines that said circuit interrupting device has reached its end-of-life and it is determined that the contacts have not failed, then a signal is driven to a first level to actuate a switch and open the contacts. Wherein said signal is further driven to a second level to inhibit said circuit interrupting device from resetting when it is determined that contacts of said interrupting device have failed. Wherein the second level has a voltage greater than zero volts.