Device, circuit, system, and method for contact sequencing are discussed. An electrical circuit includes a first pair of terminals adapted to be connected across a first set of switchable contacts, and a second pair of terminals adapted to be connected across a second set of switchable contacts that are coupled to an arc suppression circuit. A controller circuit is coupled to the first and second pairs of terminals and is configured to sequence activation or deactivation of the first and second sets of contacts based on a contact control signal. A first power switching circuit is coupled to the first pair of terminals and the controller circuit. The first power switching circuit is configured to switch power from an external power source and to trigger the activation or the deactivation of the first set of switchable contacts based on a first logic state signal from the controller circuit.

Wireless communication enabled circuit breakers are described. Methods associated with such wireless communication enabled circuit breakers are also described. The wireless communication enabled circuit breakers may controlled by a remote entity. The remote entity may wirelessly case the wireless communication enabled circuit breakers to trip.

Disclosed herein are devices, systems, and methods for testing an arc fault circuit interrupt (AFCI) device. An AFCI tester device includes a housing and a circuit assembly disposed within the housing. The circuit assembly includes a first load switching circuit for creating a pulse pattern having a plurality of pulses. The circuit assembly includes a second load switching circuit for creating an overlay signal superimposed upon at least one pulse of the plurality of pulses. The AFCI tester device includes an interface receiving the plurality of pulses and the overlay signal. The interface extends outside of the housing and is adapted for electrically coupling the circuit assembly to the AFCI device under test (DUT). The interface is adapted to transmit the pulse pattern and the overlay signal to the AFCI DUT.

Communication enabled circuit breakers and circuit breaker panels are described. Methods associated with such communication enabled circuit breakers and circuit breaker panels are also described. A circuit breaker panel may include a circuit breaker controller and one or more communication enabled circuit breakers. Two-way wireless communication is possible between the circuit breaker controller and the one or more communication enabled circuit breakers.

A solid state power switch device comprises a switch unit comprising at least one switch element configured to provide power supply to a load of a vehicle while the switch element is in close state; a switch control unit in communication with the switch unit, and configured to control in open/close state the switch element; the switch control unit comprising a built in self-test module of the switch element configured to control a self-test sequence of the switch element and to check failure/success of the self-test sequence of the switch element such that the switch unit is self-tested.

Implementations of ground fault circuit interrupter (GFCI) self-test circuits may include: a current transformer coupled to a controller, a silicon controlled rectifier (SCR) test loop coupled to the controller, a ground fault test loop coupled to the controller, and a solenoid coupled to the controller. The SCR test loop may be configured to conduct an SCR self-test during a first half wave portion of a phase and the ground fault test loop may be configured to conduct a ground fault self-test during a second half wave portion of a phase. An SCR may be configured to activate the solenoid to deny power to a load upon one of the SCR self-test or the ground fault self-test being identified as failing.

Testing device for testing an overcurrent protector, and method of operating the same. First and second switches are provided for connecting the first and second terminals of the overcurrent protector to first and second capacitors, respectively. The first and second capacitors are pre-charged to first and second voltages, where the second voltage is lower than the first. A controller switches the first and second switches to their test positions, which establishes a current path from the first capacitor to the second capacitor through the overcurrent protector. The first and second voltages are selected so that the peak current that would be generated in the current path is greater than the overcurrent threshold of the overcurrent protector.

A high speed arc suppressor and method include a first phase-specific arc suppressor configured to suppress arcing across contacts of the power contactor in a positive domain and a second phase-specific arc suppressor configured to suppress arcing across the contacts in a negative domain. First and second high speed switches are configured to enable and disable operation of an associated one of the first and second phase-specific arc suppressors. First and second drivers are configured to drive the first and second high speed switches.

A switch diagnosing apparatus and method capable of effectively diagnosing a switch of a battery pack. If a plurality of battery modules having a parallel structure are provided, the switch connected to a diagnosis target battery module may be effectively diagnosed based on the voltage of a switch connected to a battery module other than the diagnosis target battery module.

The invention relates to the technical field of device detection, and in particular provides a status detection method and device for a vehicle light signaling control device, and a vehicle, so as solve a technical problem of how to accurately and reliably detect an operating status of a vehicle light signaling control device. For this purpose, according to the method of an embodiment of the invention, a first resistance jump sequence of a currently detected position resistance may be obtained according to historical position resistance data and the currently detected position resistance; and then it is determined whether the vehicle light signaling control device has malfunctioned, according to a comparison result of the first resistance jump sequence and a preset second resistance jump sequence. By means of the foregoing steps, when a jump sequence of the position resistance is consistent with a normal resistance jump sequence, it may be determined that an actual position of a turn position shifting module is a position corresponding to this position resistance, which overcomes a defect of false position determination in the prior art caused by the inconsistency between a position corresponding to a resistance value detection result and an actual position of a light control lever.