A high current source (200) for a test system for testing an electric power device (30) comprises a first plurality of first switchable half-bridges (212) and a second plurality of second switchable half-bridges (222), which are connected in parallel and by means of which a test current is redundantly distributed. A control device (280) is designed to control the first and second half-bridges (212, 222) on the basis of an input signal in such a way that an output signal for the test current, which corresponds to the input signal, is applied across a bridge branch (230) between the first switchable half-bridges (212) and the second switchable half-bridges (222).

A portable diagnostic apparatus for performing diagnostic testing on a circuit breaker includes a number of sensor devices structured to generate a number of sensed parameter signals relating to operation of the circuit breaker during an operational sequence, a number of auxiliary input connectors structured to receive a number of auxiliary data signals from the circuit breaker, the number of auxiliary data signals relating to and being generated in response to the operation of the circuit breaker during the operational sequence, and control and diagnostic circuitry. The control and diagnostic circuitry is structured to control operation of the portable diagnostic apparatus, receive the number of sensed parameter signals and the number of auxiliary data signals, and generate a time signature based on the number of sensed parameter signals and the number of auxiliary data signals.

A contact wear indicator assembly for a circuit breaker assembly is provided. The contact wear indicator assembly includes an interface assembly, an indicator drive assembly, and a user display assembly. The user display assembly includes an output device. The output device is structured to produce a visual indication representative of a measurable contact characteristic. The indicator drive assembly is operatively coupled to the interface assembly, whereby the indicator drive assembly moves between a first position and a second position corresponding to an interface assembly first and second position. The indicator drive assembly is measurably coupled to the user display assembly. The user display assembly is structured to convert the position data of the indicator drive assembly into a quantified output such as, but not limited to, contact characteristics. The user display assembly is further structured to display the indicator drive assembly position data on the output device.

A ground fault circuit interrupter (GFCI) breaker testing system can include an enclosure having at least one wall that forms a cavity. The system can also include at least one GFCI breaker disposed within the cavity. The system can further include a sensing circuit assembly having at least one switch, where the at least one switch is electrically coupled to the at least one GFCI breaker. The system can also include a user interface assembly disposed, at least in part, outside the cavity, where the user interface assembly is coupled to the sensing circuit assembly, where the user interface assembly instructs the at least one switch to test the at least one GFCI breaker.

A solid-state circuit breaker comprises an air gap, at least one counter and/or a timer, a memory, a radio and a microprocessor to: retrieve saved health data, alert data and counter, timer data from the memory, determine a status of a heath rating by data and comparing the heath rating to a threshold, if it is poor, send a message via a smart phone application (APP) and start a counter or timer, determine if the counter is at a predefined value and/or the timer is expired, if the counter is at a predefined value and/or the timer is expired, turn OFF the breaker and inhibit from being turned on, send a breaker OFF/disabled alert message using the radio to an end user/a customer via the APP, and if the counter is not at a predefined value and/or the timer is not expired, increment/decrement the counter and/or the timer.

In aspects of the present disclosure, a circuit interrupter includes a housing, a conductive path, a switch which selectively interrupts the conductive path, sensor(s), memory, and a controller within the housing. The sensor(s) measure electrical characteristic(s) of the conductive path. The memory stores an arc detection program that implements a machine learning model and includes a field-updatable program portion and a non-field-updatable program portion, where the field-updatable program portion includes program parameters used by the non-field-updatable program portion to decide between presence or absence of an arc fault. The controller executes the arc detection program to compute input data for the machine learning model based on the sensor measurements, decide between presence of an arc event or absence of an arc event based on the input data, and cause the switch to interrupt the conductive path when the decision indicates presence of an arc event.

A method monitors a circuit breaker in an electrical power supply network, in which one section of the electrical power supply network is monitored in respect of the occurrence of a fault. Upon detection of a fault in the monitored section, a trigger signal is output to a circuit breaker bordering the section, and a switch-fault signal indicating a fault upon opening the circuit breaker is generated if a continuous current flow through the circuit breaker is detected after the trigger signal is output. In order to provide for a preferably rapid and reliable detection of a continuous current flow or an interruption of the current flow during the monitoring of a circuit breaker, it is provided that a curve shape of the time curve of the instantaneous current flowing through the circuit breaker is investigated in order to detect a continuous current flow.

A testing device for a meter socket assembly, including breaker load lugs, includes a base unit having a plurality of test probes, a ground node, and a breaker node having a plurality of breaker probes. To perform the test, the base unit is inserted into a jaw meter socket such that each of the plurality of test probes are in contact with jaws of the jaw meter socket, at least two of the plurality of breaker probes are in contact with each of a plurality of breaker load lugs of a main breaker, and the breaker node is electrically connected to the base unit. The testing device determines the jaw type of the meter socket assembly and can output results of tests relating to phase to phase, phase to ground, crossed cables, and interruption of electrical paths. The testing device can output results of the test audibly and visually.

A system for testing substation circuit breakers while the circuit breakers are grounded on both sides using a ground clamp probe electrically connected to one side of the circuit breaker contacts, where the ground clamp probe provides a means of interfacing standard test equipment to the circuit breaker without removing either safety ground, and analyzing the circuit breaker and outputting the results to a technician on a display.

A test device for testing the invariability of the output voltage of a voltage regulator with transient loads, and the test device includes a switch connected with a switch drain contact to an output contact of the voltage regulator and with a switch source contact to ground potential, where a load resistance is arranged within this path from the output contact to ground potential, a switch driver connected with a switch driver output contact via a gate resistance to a switch gate contact to change the switch into a connected state, where the voltage regulator is loaded with a variable drain-source resistance of the switch and the load resistor, and to change the switch into a disconnected state, where the voltage regulator is disconnected from the load resistor, and a feedback resistor connected between the switch source contact and an inverted input contact of the switch driver.