An earth leakage detecting device comprises following elements. A first end of coupling capacitor is connected to a current path of power storage connected to load in a state of being insulated from a ground. Voltage output unit generates a periodic voltage that changes periodically, and applies the periodic voltage to a second end of coupling capacitor via impedance element. Voltage measurer measures a voltage at a connection point between coupling capacitor and impedance element. Earth leakage determiner determines presence or absence of an earth leakage between the current path of power storage and the ground on the basis of the measured voltage. Voltage output unit has a preparation period for constantly outputting a potential between a high-side potential and a low-side potential of the periodic voltage before a measurement period for outputting the periodic voltage.

A method and a measuring device for detecting a leakage current in an ungrounded, single-phase alternating-current power supply system. A variable test resistance is switched between one of the outer conductors and ground and starting from a minimally admissible test-resistance value, at least one of three support test-resistance values is determined as support locations. In an equivalent circuit of the modeled alternating-current power supply system, an equations system is set up for describing the dependency of currents and voltages. An extrapolation on the test-resistance value zero leads to a calculated test current which corresponds to the leakage current to be detected. Consequently, a ground fault situation may be simulated without actually causing a dangerous ground fault.

Systems and methods of testing cables are provided. An exemplary testing system for testing radio frequency (RF) cables in a telecommunication system including a cable under test includes a termination element configured to be coupled to a distal end of the cable under test; and a controller in communication with the termination element, wherein the controller switches the termination element between two or more termination states selected from the group consisting of an open termination state, a short termination state, a load termination state, and a through state.

A device and method for detecting a location of an arc event between a power bus and a coupler of an electric vehicle monitors an interface between the power bus and the coupler for the occurrence of an optical event. A determination is made if an arc event occurred based on the optical event, and upon determining the occurrence of an arc event at least one of a time the arc event occurred or a position of the electric vehicle at the time the arc event occurred is recorded.

A reduced pin count (RPC) device includes an electrical circuitry in a package with uniformly distributed leads, a subset of the leads being electrically disconnected form the circuitry. A contactor pin block with sockets corresponding to the uniformly distributed leads has the sockets corresponding to the leads with electrical connections filled with test pins suitable for contacting respective leads, and the sockets corresponding to the electrically disconnected leads voided of test pins. Dummy plugs are inserted into the voided sockets to block the sockets and prevent accidental insertions of test pins.

A apparatus for monitoring the integrity of an electrical wire includes a clamp system, a sensor system, a user interface configured to receive input data and output wire information, and a control unit configured to process the wire data, process the input data, and generate the output wire information. The clamp system includes a clamp and the sensor system includes a sensor configured to retrieve the wire data. In another embodiment, a portable device is configured to obtain wire data from a smart clamping system, to transmit the wire data to a processor and to receive a multi-dimensional representation, and a computer system configured to receive the wire data generated and to generate the multi-dimensional representation of the wire. A method for monitoring a wire includes capturing wire data using a clamp, transmitting the wire data to a control unit, generating wire information to output, and outputting the wire information.

A module-based framework evaluates designs of advanced start stop systems, particularly 12 V advanced start stop systems. The framework separates vehicle and battery analysis and uses a power profile to evaluate different designs of the vehicles and batteries. Particularly, the framework can evaluate different battery solutions and compare performances as a function of drive cycles, motor size, and electrical loads. In addition to modeling, actual batteries are tested for the same power inputs for validating performance differences. This framework identifies performance limiting components for determination of the vehicle system component optimization.

An apparatus for providing a test signal from a device under test (DUT) to a measurement instrument is disclosed. The apparatus includes a probe head configured to receive an electrical signal from the DUT. The probe head includes an electro-optic modulator. The apparatus also includes a control box, which includes an optical source. The optical source is configured to provide an input optical signal to the electro-optic modulator, which is configured to provide an output optical signal based on the electrical signal from the DUT. The control box also includes an optical bias control circuit. Only a bias control signal is provided to the electro-optic modulator.

The present disclosure discloses a test socket including an inelastic insulating housing formed of an inelastic insulating material having a plurality of housing holes, and a plurality of electro-conductive parts comprising electro-conductive particles in an elastic insulating material, the electro-conductive parts including an electro-conductive part body having a lower end portion to be connected to a signal electrode of the tester, an upper end portion to be connected to the terminal of the device under inspection, and an electro-conductive part bump connected to the electro-conductive part body to protrude from one or both of an upper and lower surface of the inelastic insulating housing.

Arc fault detection modules for vehicles intended to supervise circuits and detect arc fault conditions in both alternating current and direct current circuits. A number of these arc fault detection modules may be integrated into a vehicle's electrical system in strategic locations. Each arc fault module contains sensing capabilities for monitoring the circuit, and may also include signal conditioning capabilities, processing capabilities for determining the occurrence of an arc fault, contactors for disabling the supervised circuit, and communications capabilities to interact with other vehicle components and telematics systems. As a result arc fault detection odules can be customized to leverage existing features of a vehicle's electrical system or to provide fully redundant arc fault protection.