A method includes detecting a modulating undervoltage state having transients above an undervoltage threshold and triggering a protection upon detecting the modulating undervoltage state. The method can include detecting a steady state undervoltage condition, wherein triggering a protection includes triggering the protection upon detecting the steady state undervoltage condition or the modulating undervoltage state. A system includes a power source including a feedback sensor at a point of regulation (POR) of the power source configured to generate feedback indicative of voltage at the POR. A controller is operatively connected to receive the feedback. The controller includes controller logic that is configured perform a method as described above.

A portable electrical energy power node is provided. The power node includes first and second input power terminals and first and second output power terminals. The input power terminals are adapted for receiving a source of electrical power and the output terminals are adopted for connecting to a load. A first power line connects the first input terminal to the first output terminal, a second power line connects the second input terminal to the input side of a circuit interrupter and a third power line connects the output side of the circuit interrupter to the second output terminal. The circuit interrupter selectively interrupts the connection between the second input terminal and the second output terminal in accordance with a fault sensor and a control unit.

A method and apparatus for monitoring and controlling electrical energy consumption in an electrical circuit is provided. The monitoring device includes a sensor coupled to the electrical circuit for producing an electrical fault signal when a fault is detected in the circuit, a signal processing unit coupled to the fault sensor for improving the signal to noise ratio of the fault signal, a fault trigger condition register for storing at least one response action to be taken by the monitoring device when the fault condition is detected and a central processing unit (CPU) coupled to the signal processing unit and to the fault trigger condition register. In response to the fault signal, the CPU causes the monitoring device to take a response action.

In a charging current method for limiting a charging current in a DC voltage circuit, the charging current is conducted from an electric supply grid into the DC voltage circuit via diodes. A DC voltage of the DC voltage circuit is ascertained and is based on the supply voltage of the electric supply grid. A variable undervoltage threshold on the DC voltage circuit is determined and a limit of the charging current is activated when the DC voltage reaches or falls below the variable undervoltage threshold.

A method includes detecting a modulating undervoltage state having transients above an undervoltage threshold and triggering a protection upon detecting the modulating undervoltage state. The method can include detecting a steady state undervoltage condition, wherein triggering a protection includes triggering the protection upon detecting the steady state undervoltage condition or the modulating undervoltage state. A system includes a power source including a feedback sensor at a point of regulation (POR) of the power source configured to generate feedback indicative of voltage at the POR. A controller is operatively connected to receive the feedback. The controller includes controller logic that is configured perform a method as described above.

The present disclosure relates to a monitoring assembly for monitoring a supply signal of an electrically operated component, wherein the monitoring assembly comprises a monitoring circuit and a control and evaluation unit assigned to the monitoring circuit. At least one galvanically isolated connection is provided between the monitoring circuit and the control and evaluation unit. The monitoring circuit includes at least one threshold-dependent component which generates a current signal as a function of an applied supply voltage. The supply voltage is an AC voltage. The at least one threshold-dependent component is configured so as to generate a current signal when the supply voltage is above a first threshold value. The control and evaluation unit is set up to evaluate the at least one transmitted output signal to determine a fault condition. The control and evaluation unit is set up to output a drive signal when the fault condition has been determined. A system is furthermore described.

The present disclosure relates to a monitoring assembly for monitoring a supply signal of an electrically operated component, wherein the monitoring assembly comprises a monitoring circuit and a control and evaluation unit assigned to the monitoring circuit. At least one galvanically isolated connection is provided between the monitoring circuit and the control and evaluation unit. The monitoring circuit includes at least one threshold-dependent component which generates a current signal as a function of an applied supply voltage. The supply voltage is an AC voltage. The at least one threshold-dependent component is configured so as to generate a current signal when the supply voltage is above a first threshold value. The control and evaluation unit is set up to evaluate the at least one transmitted output signal to determine a fault condition. The control and evaluation unit is set up to output a drive signal when the fault condition has been determined. A system is furthermore described.