A circuit breaker distribution system is configured to provide selective coordination. The system comprises a solid-state switch disposed as a main or upstream breaker and a switch with an over current protection disposed as a branch or downstream breaker. The microcontroller to: allow repeated pulses of current through to the branch or downstream breaker in an event of an overload or short circuit, choose a maximum current limit for the solid-state switch as a “chop level” such that the chop level is chosen higher than a rated current of the solid-state circuit breaker but low enough that the solid-state switch is not damaged from repeated pulses over a period of time needed to switch OFF the branch or downstream breaker and add a pulse interval after the current chops to zero but before the solid-state circuit breaker returns to an ON state for a next pulse to begin.

It is an object to provide an electric vehicle charging monitoring device and an electric vehicle charging monitoring method. According to an embodiment, a device comprises: a current measurement device configured to measure an electrical current flowing from an electrical input to an electrical output and a computing device electrically coupled to the current measurement device, configured to: monitor a number of charging sessions based on the electrical current flow from the electrical input to the electrical output; compare the number of charging sessions to a first preconfigured value; and detect abnormal current flow based on the charging session comparison. A device, a method, and a computer program product are provided.

Provided are embodiments of systems, devices and methods to create and visualize an arc-flash incident energy or arc fault thermal energy on a TCC plot. In some embodiments, the system may use an area shape or region (of any form) on a TCC plot. The bounded area may represent a reference constant or variable arc fault energy or arc flash incident energy value.

A protection circuit for a transistor switch coupled to a power supply rail operates to modulate a control voltage at a control terminal of the transistor switch. A first circuit detects an overload across the terminals of the switch with respect to a threshold to generate a signal which modulates the control voltage. A second circuit operates to adjust a value of the threshold in response to sensed variations in a supply voltage at the power supply rail.

The invention relates to a device circuit breaker having intelligent limit value determination. In a training phase, the device circuit breaker is adjusted to a specific device and its load behavior. In a subsequent monitoring phase—based on the values determined in the training phase—present values or values derived from those are compared and, if necessary, the current flow is interrupted.

A circuit breaker system includes a first circuit breaker and a second circuit breaker. The first circuit breaker has a first trip unit, a first control unit, and a first electrical sensor. The first control unit is configured to control the first trip unit. The second circuit breaker has a second trip unit, a second control unit, and a second electrical sensor. The second control unit is configured to control the second trip unit. The first control unit is in communication with the second control unit. The first control unit is configured to monitor the communication with the second control unit to determine whether there is an internal device failure in the second circuit breaker. The first control unit is configured to change the first control unit's standard tripping characteristics to emergency tripping characteristics based on detecting the internal device failure of the second circuit breaker.

A power supply interface includes a first switch that couples an input terminal to an output terminal. A voltage dividing bridge is coupled to receive a supply potential. A comparator has a first input connected to a first node of the bridge and a second input configured to receive a constant potential. A digital-to-analog converter generates a control voltage that is selectively coupled by a second switch to a second node of the bridge. A circuit control controls actuation of the second switch based on operating mode and generates a digital value input to the converter based on a negotiated set point of the supply potential applied to the input terminal.

Systems, methods, techniques and apparatuses of high current protection are disclosed. One exemplary embodiment is a power system comprising a solid-state circuit breaker including a solid-state switching device, an energy dissipation branch, an assistive branch, and a controller. The energy dissipation branch is coupled in parallel with the solid-state switching device and includes an energy dissipation device. The assistive branch is coupled in parallel with the solid-state switching device and includes a resistor, an inductor, and a galvanic isolation switching device coupled together in series. The controller is configured to determine the solid-state circuit breaker is conducting a high magnitude current, select a continuous current limiting mode or an intermittent current limiting mode, and operate the solid-state switching device based on the selected current limiting mode.

A GFCI includes a current sensor system providing a current sensor signal indicating a leakage current of the AC power system. A magnitude detector is configured to provide a first channel signal indicating an RMS value of the current sensor signal. A reference signal generator is configured to provide a second channel signal indicating a trip reference value responsive to a frequency of the current sensor signal. A fault detector is configured to provide a fault trip signal indicating ground fault condition of the AC power system in response to the first channel signal and the second channel signal. A circuit breaker mechanism is configured to open a circuit of the AC power system in response to the fault trip signal.

An approach is disclosed for assisting a user with configuring an integrated circuit with customizable overcurrent protection. A user interface (UI) is provided that allows a user to specify inputs to an apparatus. The apparatus supports connecting user customizable plug and play components to the integrated circuit. Responsive to the user utilizing the UI by specifying inputs, the UI identifies requirements for overcurrent protection elements in the apparatus.