A fault clearing circuitry provided for connecting to at least one electrical line transmitting power includes: an electrical energy storage; at least one controllable switch connectable between the electrical energy storage and at least one electric line; and a control circuit for monitoring the at least one electric line for a fault and to close the at least one controllable switch if a fault is detected. The electrical energy storage stores an amount of electrical energy dimensioned to be sufficient for releasing one or more circuit breakers or clearing one or more fuses in the at least one electrical line in order to clear the fault. The control circuit closes the at least one controllable switch if a fault is detected such that a discharging of the electrical energy stored in the electrical energy storage is incurred injecting a current pulse in the at least one electrical line.

Examples relate to power supply system comprising a primary power supply to deliver a first power to a load and a secondary power supply that, in response to a failure in the primary power supply, is to deliver a second power to the load. The system further comprises a primary energy storage component coupled to the primary power supply that, in response to the failure in the primary power supply, is to deliver a third power to the load while the secondary power supply transitions from a lesser output power level to a greater output power level. The third power is at the same full-rated power level than the first power.

A safety module for a field-bus system comprising a switch-on unit, a control unit, a supply input provided to feed supply power, a first supply output provided to relay secured supply power to a consumer, a first switching element to electrically connect or disconnect the supply input and the first supply output, and a supply module to provide an operating power via an operating-power-supply line for operating the control unit. The control unit is connected to the first switching element to secure the supply power being relayed via the first supply output by actuating the first switching element. The supply module is electrically connected to the supply input and to a field-bus-power input. The field-bus-power input is provided to feed a field-bus power into the safety module for operating the switch-on unit. The supply module is provided to generate the operating power either from the supply power or field-bus power.

The invention relates to a novel approach for the protection of electrical circuits from ground faults and parallel and series arc faults in a fully solid-state circuit configuration. Solid-state circuits and methods of use are described that provide the key functions of low-voltage DC power supply, mains voltage and current sensing, fault detection processing and high voltage electronic switching.

The invention relates to a novel approach for the protection of electrical circuits from ground faults and parallel and series arc faults in a fully solid-state circuit configuration. Solid-state circuits and methods of use are described that provide the key functions of low-voltage DC power supply, mains voltage and current sensing, fault detection processing and high voltage electronic switching.

A hybrid switch assembly for use in a circuit interrupter, the hybrid switch assembly including an input, an output, separable contacts electrically connected between the input and the output, a solid state switching circuit electrically connected between the input and the output and in parallel with the separable contacts, and a fuse electrically connected in series with the solid state switching circuit. The solid state switching circuit is structured to turn on and allow current to flow through it between the input and the output for a predetermined amount of time after the separable contacts separate.

Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.

Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.

A power circuit includes a bleeder circuit, wherein a first terminal of the bleeder circuit is an output terminal, and a second terminal of the bleeder circuit is grounded; a control circuit, wherein a first terminal of the control circuit is connected to the output terminal, a second terminal of the control circuit is a feedback terminal and is connected to the bleeder circuit, and a third terminal of the control circuit is an input terminal; and a feedback capacitor, wherein a first terminal of the feedback capacitor is connected to the output terminal, and a second terminal of the feedback capacitor is connected to the bleeder circuit. The power circuit adds a feedback capacitor between the output terminal and the feedback terminal and can rapidly provide output terminal voltage changes to the feedback terminal and accelerate regulation of an output voltage.

A multi-line supply unit for a vehicle control unit, including at least two supply lines each connected to a vehicle voltage source at the input and brought together at a common node at the output; and a protective device, including, in each of the supply lines, at least one first damping diode looped into the supply lines in the forward direction, between the vehicle voltage source and the node; and an operating method for such a multi-line supply unit. At least one switch element is looped into each of the supply lines, respectively, in parallel with the damping diode, respectively; an evaluation and control unit measuring and evaluating a line voltage at the inputs of the supply lines, respectively, and measuring and evaluating a reverse-polarity-protected supply voltage at the common node, and controlling the switch elements in the supply lines as a function of the evaluation, using corresponding control signals.