A power cord includes at least two power supply lines, at least two insulation layers respectively covering the power supply lines, first and second shield layers respectively disposed around corresponding insulating layers to detect leakage currents on the corresponding power supply lines, at least one shield insulating layer disposed between the first and second shield layers to electrically insulate them from each other, a first and a second signal conductor disposed either between the first (or second) shield layer and the corresponding insulation layer or outside the first (or second) shield layer. Each signal conductors is formed of at least one conductor wire and at least one filament in a twisted or woven structure and configured to conduct the leakage current. The signal conductors have great tensile strength which solves the problem of breaking of the signal conductors.

Built-in instrumentation for power measurement integrating power monitoring, delivery and management, power safety, and automation control.

An electrical link between a DC source and a user apparatus (250) including an electrical conductor (240) having an insulating cover and an electrical protection device (200) which includes: a conductive sleeve (280) around the insulating cover, a circuit breaker (210) on the electrical conductor (240), a biasing module (245) configured to voltage-bias the conductive sleeve (280) with a DC voltage; a device (250a) for limiting the bias voltage of the conductive sleeve having a limit voltage lower than the test voltage; and a detection module (220) connected to the conductive sleeve (280) and configured to detect a limiting of the bias voltage of the conductive sleeve by the limiting device (250a), and to command the circuit breaker (210) on the basis of the detection.

Electrical cables with integral surge protection are disclosed. An example electrical cable surge protector includes an electrically insulated cable; first and second plugs; and a surge protection circuit electrically coupled to be integral with the power cable with the electrically insulated cable and configured to divert surge energy conducted between the first and second plugs by the electrically insulated cable.

An eMarker device is used in a cable electrically connected between a first port and a second port, wherein the cable includes a configuration channel communication wire. The eMarker device comprises: a first eMarker disposed near the first port and including a first active protection module coupled to the configuration channel communication wire, wherein the first eMarker is electrically connected to a first power pin of the first port and a second power pin of the second port; and a second eMarker disposed near the second port and including a second active protection module coupled to the configuration channel communication wire, wherein either of the first active protection module and the second active protection module changes an electric characteristic of the configuration channel communication wire to have the first port detect a disconnecting status of the second port when a specified event happens.

A connection-and-protection device having two capacitively connected conductors respectively connected in use to a supply cable at one end and a load cable at the other end is provided, the connection and protection device including a connection terminal for connection to either of the supply or load cables, a pair of cable terminals for the respective capacitively connected conductors, a direct connection within the device between the connection terminal and one of the pair of cable terminals, the other of the pair cable terminals not normally being connected to the connection terminal and means for connecting the other of the pair of cable terminals to the connection terminal to protect the capacitive connection of the two conductors, if the voltage between the pair of cable terminals exceeds a threshold and event detection means comprising means for detection the voltage between the pair of cable terminals exceeding a threshold.

A method and a system are used to monitor electrical measurements of a power system during a period of time. The system calculates and analyzes incremental quantities based on the electrical measurements of the power system. The incremental quantities are used to identify a conductor breaking fault in the power system. Instructions are sent out to activate certain actions (e.g., protective actions) based on the identified fault and the type of fault. The system operates continuously to provide real-time monitoring and fault identification.

An electric-wire protection device includes a voltage adjustment unit that adjusts the voltage to a load, and a controller that includes a temperature calculation unit that calculates temperature information on an electric wire from a value of current, and makes the voltage adjustment unit into a shut-off state based on the temperature information. The temperature information is calculated from an amount of temperature changes based on the current value and a predetermined initial value. The controller shifts into a sleep state when a sleep condition is satisfied that includes a condition that the temperature information is lower than the initial value. The initial value when the controller returns from the sleep state is based on a convergence value of temperature in conducting energization on the electric wire at a maximum value of steady-state current.

A cable including a power conductor configured to transmit electrical power between a first device and a second device, a first data conductor configured to transmit data between the first device and the second device, and a first bimetallic switch coupled to the first data conductor and configured to mitigate current flowing through the first data conductor if a temperature of the first bimetallic switch exceeds a predefined first trip temperature, wherein the opening of the first data line indicates a fault condition to a device to which the cable is connected, whereby electrical power flowing through the power conductor is resultantly mitigated.

An electric wire protection device includes a voltage adjuster that adjusts voltage on a power source side to be supplied to a load and a controller that includes a temperature calculation part which calculates temperature information of an electric wire based on a current value flowing through the voltage adjuster. The controller sets a first time constant as a time constant used to calculate the temperature information while the voltage adjuster is in the interrupted state, and sets a second time constant as a time constant used to calculate the temperature information while the voltage adjuster supplies power to the load. The first time constant is a value larger than the second time constant and equal to or larger than an actual time constant of the electric wire, and the second time constant is a value smaller than the actual time constant of the electric wire.