A voltage sensing circuit uses a voltage divider for providing a sense signal indicating the voltage across a circuit component. A current injector is used for injecting current to the sensing terminal. A sense signal is obtained with no current injection, to determine if a fault is present. The sensing terminal is coupled to the external circuit component via a voltage clamping component. A further sense signal is obtained in response to the injection of current. By comparing the sense signal in response to the injected current and a clamping voltage of the voltage clamping component, it can then be determined if the fault is caused by the circuit component or by the voltage divider.

A common point ground fault detector monitors an outlet. The detector includes a power connection having at least hot, neutral, and ground leads for connecting to the outlet, a bench ground connector, an earth ground, to which both the ground lead and the bench ground connector are electrically connection, and through which the bench ground connector discharges electrostatic charge, and a switch electrically coupled between the earth ground and the bench ground connector. The switch enables an electrical connection between the earth ground and the bench ground connector in response to a normal operating condition of the outlet, and the switch disables the electrical connection between the earth ground and the bench ground connector in response to an abnormal operating condition of the outlet.

A common point ground fault detector monitors an outlet. The detector includes a power connection having at least hot, neutral, and ground leads for connecting to the outlet, a bench ground connector, an earth ground, to which both the ground lead and the bench ground connector are electrically connection, and through which the bench ground connector discharges electrostatic charge, and a switch electrically coupled between the earth ground and the bench ground connector. The switch enables an electrical connection between the earth ground and the bench ground connector in response to a normal operating condition of the outlet, and the switch disables the electrical connection between the earth ground and the bench ground connector in response to an abnormal operating condition of the outlet.

Disclosed is a power distribution system for detecting and repairing all electrical faults, which performs at least one of immediate alarming, breaking, repairing, notifying, monitoring, and controlling according to a faulty section, place, and position where a fault occurred, if a resistance increase, an arc, an open phase, a connection failure, a partial wire disconnection, an incorrect wire connection, an abnormal voltage input, an electric leakage, a short circuit, a power imbalance occurs in three-phase or single-phase electrical equipment or in the present power distribution system.

Disclosed is a power distribution system for detecting and repairing all electrical faults, which performs at least one of immediate alarming, breaking, repairing, notifying, monitoring, and controlling according to a faulty section, place, and position where a fault occurred, if a resistance increase, an arc, an open phase, a connection failure, a partial wire disconnection, an incorrect wire connection, an abnormal voltage input, an electric leakage, a short circuit, a power imbalance occurs in three-phase or single-phase electrical equipment or in the present power distribution system.

An example waveguide connector is for making a blind-mate electrical connection between a first waveguide and a second waveguide. The waveguide connector includes a male part connected to the first waveguide, where the first waveguide includes a first conductive channel, and a female part connected to the second waveguide, where the second waveguide includes a second conductive channel. The female part includes a receptacle into which the male part slides to create the blind-mate electrical connection between the first conductive channel and the second conductive channel. A self-alignment feature is on at least one of the male part or the female part. The self-alignment feature is configured to guide the male part into the receptacle while correcting for misalignment of the male part and the female part

An example waveguide connector is for making a blind-mate electrical connection between a first waveguide and a second waveguide. The waveguide connector includes a male part connected to the first waveguide, where the first waveguide includes a first conductive channel, and a female part connected to the second waveguide, where the second waveguide includes a second conductive channel. The female part includes a receptacle into which the male part slides to create the blind-mate electrical connection between the first conductive channel and the second conductive channel. A self-alignment feature is on at least one of the male part or the female part. The self-alignment feature is configured to guide the male part into the receptacle while correcting for misalignment of the male part and the female part

A system includes a first integrated circuit including a first interface circuit with a first transmit pin and a first receive pin, and a first test circuit. The system also includes a second integrated circuit including a second interface circuit with a second receive pin coupled to the first transmit pin, and a second transmit pin coupled to the first receive pin. The second integrated circuit further includes a second test circuit configured to route signals from the second receive pin to the second transmit pin, such that the sent test signal is received by the second receive pin, bypasses the second test circuit, and is routed to the second transmit pin. The first test circuit is further configured to receive the routed test signal on the first receive pin via the second conductive path.

Methods and systems for detecting a neutral voltage connection, involve determining when a value of a neutral current is equal to zero, wherein the neutral current comprises a difference between a current flowing through two legs of an electrical meter to an end customer, wherein each of the two legs comprises a first voltage with respect to a ground and a second voltage with respect to one another; and verifying that the neutral current has been detected to zero, in response to determining that the value of the neutral current is equal to zero.

Methods and systems for detecting a neutral voltage connection, involve determining when a value of a neutral current is equal to zero, wherein the neutral current comprises a difference between a current flowing through two legs of an electrical meter to an end customer, wherein each of the two legs comprises a first voltage with respect to a ground and a second voltage with respect to one another; and verifying that the neutral current has been detected to zero, in response to determining that the value of the neutral current is equal to zero.