Disclosed are various embodiments for a self-monitoring conducting device that responds to strain and temperature changes. In one example, a self-monitoring conducting device comprises a superconducting cable having a core and one or more layers of high-temperature superconductor (HTS) tape architecture surrounding the core. The self-monitoring conducting device further includes optical fibers integrated within the superconducting cable. The optical fibers can monitor a state of the superconducting cable along a length of the superconducting cable.

Disclosed are various embodiments for a self-monitoring conducting device that responds to strain and temperature changes. In one example, a self-monitoring conducting device comprises a superconducting cable having a core and one or more layers of high-temperature superconductor (HTS) tape architecture surrounding the core. The self-monitoring conducting device further includes optical fibers integrated within the superconducting cable. The optical fibers can monitor a state of the superconducting cable along a length of the superconducting cable.

A high voltage conductor for transmitting high voltage is provided. The high voltage conductor includes a power wire, a fault detection unit, and a monitoring unit. The power wire is configured for transmission of electrical energy. The fault detection unit is configured for detecting an electromagnetic field emanated by the power wire, and the monitoring unit is configured for detection of degradation in an isolation of the high voltage conductor. The monitoring unit is connected to the fault detection unit and is configured to receive an electrical signal induced in the fault detection unit, which electrical signal is induced as a result of a degradation of the isolation of the high voltage conductor. Thus, degradation of the isolation of the high voltage conductor may be recognized at an early stage.

A cable may include a plurality of twisted pairs of individually insulated conductors, a separator positioned between the twisted pairs, and a jacket formed around the twisted pairs and the separator. The separator may include a longitudinally extending spine positioned between the plurality of twisted pairs and a plurality of projections extending from the spine. Each projection may extend between at least one adjacent set of twisted pairs. Further, along a longitudinal length of the separator, the plurality of projections extend between all of the adjacent sets of twisted pairs. However, at any given cross-sectional point along the longitudinal length, the separator does not extend between all of the adjacent sets of twisted pairs.

A method includes providing an earth wire including a core formed of a composite material, and an encapsulation layer disposed around the core. The encapsulation layer includes a conducive material and may be optionally pretensioned. The earth wire is hung between a first pole and a second pole. A suspension member may be coupled to the earth wire, and a set of conductors may be coupled to the suspension member such that a weight of the set of conductors is supported by the earth wire. A strength to weight ratio of the earth wire may be in a range of about 70 to about 500.

A temperature measurement is performed using a sensor cable. The measuring arrangement has a first signal conductor, a feed unit for feeding a measurement signal into the signal conductor, and an analyzing unit which ascertains and analyzes a change in the signal transit time of the measurement signal as a result of a temperature-induced change in a first temperature-dependent dielectric constant and is configured to derive a temperature signal from the ascertained signal transit time. The first signal conductor together with a second signal conductor forms the sensor cable, and each of the two signal conductors is surrounded by an insulation which is made of a first material that has a first dielectric constant in the first signal conductor and which is made of a second material that is different from the first material and has a second dielectric constant in the case of the second signal conductor.

A transmission cable includes a cable body, a return control circuit, and a determining circuit. The cable body has a first end and a second end, and the cable body includes a first wire and a second wire. The return control circuit is located at the second end and configured to selectively electrically connect the first wire to the second wire. The determining circuit is located at the first end, and configured to determine an electrical property of the second wire and output a first signal when the foregoing electrical property is less than a threshold.

A transmission cable includes a cable body, a return control circuit, and a determining circuit. The cable body has a first end and a second end, and the cable body includes a first wire and a second wire. The return control circuit is located at the second end and configured to selectively electrically connect the first wire to the second wire. The determining circuit is located at the first end, and configured to determine an electrical property of the second wire and output a first signal when the foregoing electrical property is less than a threshold.

The invention relates to an optical insulation monitoring device for power cables, having at least one optical waveguide for transmitting an optical signal integrated into a polymer film. The polymer film is arranged in such a way that the radially outer surface of the cable is surrounded by the polymer film in at least one longitudinal portion of the cable. At least some of the optical waveguides can be designed as multimode waveguides. The optical waveguides may be integrated in a plurality of layers in the polymer film, the optical waveguides of a first layer being arranged in staggered fashion with respect to the optical waveguides of a second layer arranged above or below the first layer. In this way, at least a section of the polymer film in the film plane is completely covered by the optical waveguides without any unwanted crosstalk between adjacent optical waveguides resulting.

A power cable or a hybrid power-data cable includes power conductors and a plurality of continuity wires positioned radially outside of the power conductors. The continuity wires are positioned relative to the power conductors such that a cut in the cable will sever one of the plurality of continuity wires before a cut into the power conductors can occur.