A partial discharge (PD) detection system includes a node including a sensor configured to capacitively couple to a shield layer of a cable of an electric power line. The sensor is configured to collect, from the cable, sensor data indicative of an alternating-current (AC) electrical signal in the cable. The system further includes a high-pass filter configured to filter out low-frequency signals from the sensor data, and processing circuitry configured to detect, based on the filtered sensor data, a PD event at a location on the cable that is local to the sensor.

It is suggested to detect a single wire interruption (SWI) of a line comprising two wires, wherein such line is part of a vectoring group, comprising (i) determining a capacitance between the single wires of the line; and (ii) determining whether a single wire interruption is present based on the determined capacitance.

Phase selection for traveling wave fault detection systems is disclosed herein. Intelligent electronic devices (IEDs) may be used to monitor and protect electric power delivery systems by detecting and acting upon traveling waves. A phase of the electric power delivery system may be selected based on the relative polarity of the traveling waves detected. The amplitude and/or polarity of the selected phase may be compared with the amplitudes and/or polarities of the other phases to determine a fault condition. For instance, the IED may determine a single-phase-to-ground fault based on the relative polarities and magnitudes of the detected traveling waves, send a protective action to the identified faulted phase, and/or continue to monitor the system for a continuation of the event or identification of a different event, such as a three-phase fault, using incremental quantities.

A system for checking the electrical insulation in converters for electric cars comprises at least one voltage generator connected to at least one line to be monitored of a high-voltage converter for electric vehicles and connected to the ground of said converter, and at least one current detection unit operatively connected to said voltage generator and configured to detect any current possibly present on the voltage generator and to generate a warning signal in the event of detection of the current.

A method for detecting a deterioration state in an elevator suspension member including electrically conductive cords uses a multiplexing unit (MU) to apply first and second alternating voltages to proximal ends of first and second groups of the cords respectively and connect the proximal end of a third group of the cords to a voltage measurement arrangement connected to a reference potential. Distal ends of the groups are connected together. A first neutral point voltage between the third proximal end and the reference potential is determined. The MU is switched to apply the first alternating voltage to the second proximal end, apply the second alternating voltage to the third proximal end and determine a second neutral point voltage between the first proximal end and the reference potential. The deterioration state of the suspension member arrangement is determined based on the first and second neutral point voltages.

A method for identifying a signal transmission device includes: reading attribute information from a memory device by a first device of a signal processing system, wherein the attribute information records information regarding at least one attribute of the signal transmission device that is coupled between the first device and a second device of the signal processing system; determining the at least one attribute of the signal transmission device by the first device according to the attribute information; and setting a maximum value or a minimum value of a signal output by the first device or the second device according to the at least one attribute.

A method for identifying a signal transmission device includes: reading attribute information from a memory device by a first device of a signal processing system, wherein the attribute information records information regarding at least one attribute of the signal transmission device that is coupled between the first device and a second device of the signal processing system; determining the at least one attribute of the signal transmission device by the first device according to the attribute information; and setting a maximum value or a minimum value of a signal output by the first device or the second device according to the at least one attribute.

Phase selection for traveling wave fault detection systems is disclosed herein. Intelligent electronic devices (IEDs) may be used to monitor and protect electric power delivery systems by detecting and acting upon traveling waves. A phase of the electric power delivery system may be selected based on the relative polarity of the traveling waves detected. The amplitude and/or polarity of the selected phase may be compared with the amplitudes and/or polarities of the other phases to determine a fault condition. For instance, the IED may determine a single-phase-to-ground fault based on the relative polarities and magnitudes of the detected traveling waves, send a protective action to the identified faulted phase, and/or continue to monitor the system for a continuation of the event or identification of a different event, such as a three-phase fault, using incremental quantities.

When manufacturing a pipeline that carries an array of electrical cables, insulation resistance monitoring is performed by a monitoring unit that is connected to the cables of the array and is mounted to a leading end of the pipeline. The monitoring unit tests the cables cyclically in succession. Monitoring is performed on the cables after their application to the pipeline and while the pipeline and the cables advance together through further manufacturing processes, such as insertion of the pipeline into the outer pipe of a pipe-in-pipe structure. If a fault is detected in any of the cables, an alert can be raised quickly enough to stop the process and to rectify the fault before the fault is covered and rendered inaccessible. The pipeline and the cables can advance continuously unless a fault is detected.

In general, a monitoring system includes one or more nodes that are capacitively coupled to a cable of a multiphase electric power line. In some examples, a node includes a coupling layer disposed over a jacket layer of the cable and capacitively coupled to a shield layer of the cable. In some examples, a node may include a first coupling layer capacitively coupled to a first cable, and a second coupling layer capacitively coupled to a second cable, such that the node is differentially coupled to the cable pair to generate a differential data signal and to perform at least one of: sensing a native signal within the cable pair; injecting an intentional signal into the cable pair; receiving an intentional signal from within the cable pair; or providing a channel characterization.