A single rail shunt cable assembly is configured to repair a damaged railroad rail segment. The single rail shunt cable assembly has a shunt cable with a first shunt cable end and a second shunt cable end. A first cable clip is joined to the first shunt cable end. A second cable clip is joined to the first shunt cable end. An ohm meter is joined to the shunt cable proximate the first cable clip. The ohm meter that shows a circuit connection between the first clamp and the second clamp when the first clamp and the second clamp are attached to the damaged railroad rail segment.

A manufacturing method of shunt resistor according to the present invention includes a step of calculating a difference between an initial resistance value and a desired resistance value as a resistance value to be adjusted, a step of providing a plurality of recess forming members capable of forming recesses each having a characteristic size in the surface of a resistive alloy plate, a recess determining step of determining the size and the number of the recesses necessary to be formed at the surface of the resistive alloy plate, and a recess forming step of forming the recesses according to the size and the number determined in the recess determining step by using the corresponding recess forming members.

A method and apparatus for determining safety of a battery are disclosed, where the method includes identifying a charge state or a discharge state of the battery, activating pulse probe currents at different depths of charge or discharge (charge/discharge) of the battery, in response to identifying the charge or discharge state of the battery, and detecting and differentiating between a state of short (SOS) and a state of health (SOH) of the battery based on variations of the pulse probe currents as a function of the depths of charge/discharge.

The present disclosure relates to a device and a method for diagnosing a failure of an inverter initial charging circuit. The device for diagnosing a failure of an initial charging circuit according to the present invention is advantageous as follows: it is possible to detect whether a relay of the initial charging circuit is malfunctioning or not by using a photocoupler connected in parallel with an initial charging resistor of the initial charging circuit, on the basis that, if a current flows through the initial charging resistor in a relay-on state, the photocoupler is turned on; and it is possible to prevent component failure or burnout from occurring due to a high current flowing through the initial charging resistor in the case of a relay failure.

A resistor arrangement for measuring current strength having connection elements and a resistor element between the connection elements. The connection elements and the resistor element are arranged in a plane and in a row such that the arrangement is strip-shaped and has its smallest spatial extent perpendicular to the current direction. The resistor element has two contact sides and the connection elements each have a contact face connected to the contact sides. When current flows through the arrangement, current flow lines are formed which are deflected at at least one of the contact sides by an angle of at least 5° at the transition from the connection element to the resistor element.

According to one embodiment, a sensor includes a base including a first face, and a first structure body fixed to the first face. The first structure body includes first and second support portions, a first movable portion, and a first fixed electrode, The first support portion is fixed to the first surface. The second support portion is fixed to the first face and provided around the first support portion. The first movable portion is supported by the first and second support portions and apart from the base. The first fixed electrode is fixed to the first face. The first movable portion includes a first movable electrode and a first conductive member. A first current is configured to flow the first conductive member. The first fixed electrode faces the first movable electrode. A first gap is provided between the first fixed electrode and the first movable portion.

According to one embodiment, a sensor includes a base including a first face including a first face region, and a first structure body fixed to the first face region. The first structure body includes a first support portion fixed to the first face region, a second support portion fixed to the first face region, a first movable portion, and a first fixed electrode fixed to the first face region. The first movable portion is supported by the first and second support portions and apart from the base in a first direction crossing the first face region. The first movable portion includes a first movable electrode facing the first fixed electrode, and a first conductive member. A first current flows the first conductive member along a second direction crossing the first direction. A first gap is provided between the first fixed electrode and the first movable portion.

A current measurement apparatus configured to quickly block current. The current measurement apparatus includes a first terminal, a second terminal, a resistor interposed in a separated space between the first terminal and the second terminal; a circuit board, a control unit mounted on the circuit board and configured to measure a current flowing in the resistor by using a voltage value between the first terminal and the second terminal and a resistance value of the resistor, and a cutting unit located above or below the resistor and configured to cut the resistor according to a control signal of the control unit.

A battery sensor for detecting a current flowing through an electrical conductor, wherein the battery sensor has at least two mutually independent measuring devices for detecting the current flowing through the electrical conductor. The measuring devices are structurally and/or electrically completely isolated from one another.

Disclosed herein is a control circuit of an isolated power supply including a first transformer and a primary-side transistor connected to a primary winding of the first transformer. The control circuit includes a timing generator that generates a timing signal with reference to an edge of a switching signal generated on a secondary side of the isolated power supply, a sampling circuit that, in response to the timing signal, samples an electric signal to be monitored, the electric signal to be monitored being an electric signal on the secondary side of the isolated power supply, and a feedback controller that, based on an output of the sampling circuit, generates a primary-side pulse signal to be supplied to the primary-side transistor.