A system for monitoring the integrity of a plurality of ground conductors has a plurality of monitors, with a different monitor associated with each ground conductor. Each monitor includes a voltage sensor which monitors voltage on a closed circuit of the monitor. Upon the voltage sensor sensing an unexpected voltage, a transmitter of the monitor issues an “alarm” signal, which may be wireless (e.g., being sent using LoRaWAN protocol). The transmitter may issue other signals, including a periodic “heartbeat” signal to confirm continued operation of the monitor, and a “movement” signal to indicate movement of the monitor. The monitor may be GPS-enabled, in which case each signal may include the GPS coordinates of the monitor. The signals issued by the transmitter may ultimately be analyzed by an operator via a user interface platform, which may simultaneously display information regarding two or more of the plurality of monitors.

A high current source (200) for a test system for testing an electric power device (30) comprises a first plurality of first switchable half-bridges (212) and a second plurality of second switchable half-bridges (222), which are connected in parallel and by means of which a test current is redundantly distributed. A control device (280) is designed to control the first and second half-bridges (212, 222) on the basis of an input signal in such a way that an output signal for the test current, which corresponds to the input signal, is applied across a bridge branch (230) between the first switchable half-bridges (212) and the second switchable half-bridges (222).

The present disclosure relates to a contact monitoring device for a vacuum circuit breaker, which may compensate for errors of a contact monitoring device capable of monitoring a contact wear amount in a vacuum interrupter, and to a vacuum circuit breaker comprising same. According to the present disclosure, the contact monitoring device for a vacuum circuit breaker may determine an appropriate time for maintenance and repair by monitoring in real time a contact wear amount using a photosensor. Moreover, the contact monitoring device for a vacuum circuit breaker, by using two photosensors, minimizes position errors with respect to the photosensors or a push rod that may be present inherently in the sensors or occur due to an installation state, and thus, may detect the contact wear amount with precision.

A method for testing capacitive current switching of a circuit breaker, including: realizing a capacitive current switching by the circuit breaker, measuring voltage at the terminals of the circuit breaker after the capacitive current switching, calculating the gradient of the measured voltage, determining whether there is at least one point of gradient whose amplitude exhibits an absolute value greater than a first predetermined threshold, and when such a point is determined, identifying the instant of appearance of the determined point and of the amplitude of variation of the voltage at that instant, as voltage drop.

A process for estimating the residual life of an electromagnet of a vibrating feeder of articles is described, controlled through a control circuit to make at least one element of the feeder vibrate in frequency, the process comprising the following phases: constantly monitoring the waveform of the absorbed current (I) and the operating voltage (V) to calculate an ohmic resistance value to be compared with a reference value; comparing the measurement of the density of a magnetic flux (Bm) with respect to a reference saturation limit value (Bsat), using an inductance value (L) based on the acquisition of the absorbed current (I) value; verifying an efficient operating situation of the vibrating feeder through the condition (ε1=B.sub.m−B.sub.sat<0).

A method for diagnosing the state of wear of an electrical switching unit including an electrical unit monitoring phase. The monitoring phase uses learning data loaded previously and representative of the type of electrical unit, and initialization data corresponding to the unit to be monitored and stored in an initialization phase. The monitoring phase includes the measurement and the acquisition of a measurement curve on opening the electrical unit, the determination of the value of local descriptors of the measurement curve as a function of values of the measurement curve, of initialization data and of learning data, the determination of the positioning of local descriptor values, the determination of an overall state class as a function of the positioning values. The device and the electrical unit implement the method.

An operating component has a sensor device for recording measurement values and a communication device for transmitting a status report. A data storage device stores the recorded measurement values and a status estimation device determines an operating status with the aid of the recorded measurement values.

An apparatus and method for diagnosing a short circuit accident occurring at a positive electrode contactor of a battery pack. This apparatus diagnoses a positive electrode contactor of a battery pack, which includes a positive electrode contactor provided on a charge-discharge path connected to a positive electrode terminal and a negative electrode contactor provided on a charge-discharge path connected to a negative electrode terminal.

A relay device may include an armature that moves between a first position that electrically couples the armature to a first contact and a second position that electrically couples the armature to a second contact. The relay device may also include a relay coil that receives a voltage to magnetize the relay coil, thereby causing the armature to move from the first position to the second position. The relay device may also include a drive circuit that couple the voltage to the relay coil, such that the voltage is higher than a rated voltage associated with the relay coil.

A circuit arrangement for voltage testing and partial discharge capture in a single-phase or multi-phase medium-voltage or high-voltage installation includes: one or a plurality of conductor signal inputs, each of which is configured for coupling to a respective capacitive coupling electrode that is coupled to a respective conductor of the installation, at least one voltage testing unit coupled to the relevant conductor signal input and configured for threshold-based voltage state capture, at least one partial discharge detector unit configured for partial discharge detection with respect to the relevant conductor and including a partial discharge detector circuit and a partial discharge display circuit coupled to it, and an energy supply for the partial discharge detector unit with a first energy supply circuit for supplying the partial discharge detector circuit with energy from the relevant conductor signal input and/or with a second energy supply circuit for supplying the partial discharge display circuit with energy from the relevant conductor signal input. An input side of the partial discharge detector circuit can be coupled via a partial discharge connection path to an earth side of an installation system capacitance that is electrically parallel to the capacitive coupling electrode. The circuit may be used for voltage testing and partial discharge capture in single-phase or multi-phase medium-voltage or high-voltage installations.