A circuit breaker includes a capacitive voltage sensor located within its insulating casing. The voltage sensor includes a capacitor located between the terminals of the circuit breaker adjacent a low potential surface provided by a coil of a current sensor. The capacitor is dome shaped. The voltage sensor does not appreciably increase the size or weight of the circuit breaker and is reliable and accurate.

A circuit breaker includes a capacitive voltage sensor located within its insulating casing. The voltage sensor includes a capacitor located between the terminals of the circuit breaker adjacent a low potential surface provided by a coil of a current sensor. The capacitor is dome shaped. The voltage sensor does not appreciably increase the size or weight of the circuit breaker and is reliable and accurate.

A capturing device for optically capturing an object to be checked includes a radiation source having a wall which encompasses a recording chamber. The radiation source is configured to emit at least infrared radiation when in a heated state. The wall has at least one insertion opening for inserting the object to be checked into the recording chamber and at least one image-recording opening for recording images of the object to be checked. The capturing device also includes an image-capturing apparatus configured to record images of the object to be checked through the at least one image-recording opening.

A high-speed signal subsystem testing system tests a processor transmitter and receiver coupled to a connector via a transmitter trace and a receiver trace, respectively. A transmitter test circuit on a testing board coupled to the connector compares a transmitter voltage received from the transmitter via the transmitter trace and the connector to a common mode voltage range and, in response to the transmitter voltage being outside the common mode voltage range, provides a transmitter trace issue signal. A receiver test circuit on the testing board coupled to the connector transmits a first test voltage towards the receiver, compares a second test voltage detected at the receiver test circuit in response to transmitting the first test voltage towards the receiver to a reference test voltage and, in response to the second test voltage being above the reference test voltage, provides a receiver trace issue signal.

A high-speed signal subsystem testing system tests a processor transmitter and receiver coupled to a connector via a transmitter trace and a receiver trace, respectively. A transmitter test circuit on a testing board coupled to the connector compares a transmitter voltage received from the transmitter via the transmitter trace and the connector to a common mode voltage range and, in response to the transmitter voltage being outside the common mode voltage range, provides a transmitter trace issue signal. A receiver test circuit on the testing board coupled to the connector transmits a first test voltage towards the receiver, compares a second test voltage detected at the receiver test circuit in response to transmitting the first test voltage towards the receiver to a reference test voltage and, in response to the second test voltage being above the reference test voltage, provides a receiver trace issue signal.

Circuit test devices and methods are provided. The method includes measuring a voltage between first and second conductor points (CPs) of a circuit under test (CUT), and determining if the measured voltage is less than a low voltage threshold value (LVTV) indicative of electrical continuity (EC) between the first and second CPs. In response to determining that the measured voltage is less than the LVTV, the method includes: transmitting a test signal (TS) to the first or second CP, and determining if the test signal is received after being transmitted. In response to determining that the TS is received, a presence of EC between the first and second conductor points is reported, and in response to determining that the TS is not received, absence of EC between the first and second CPs, or a lack of electrical contact between the VMC and the first and/or second CP(s), is reported.

Circuit test devices and methods are provided. The method includes measuring a voltage between first and second conductor points (CPs) of a circuit under test (CUT), and determining if the measured voltage is less than a low voltage threshold value (LVTV) indicative of electrical continuity (EC) between the first and second CPs. In response to determining that the measured voltage is less than the LVTV, the method includes: transmitting a test signal (TS) to the first or second CP, and determining if the test signal is received after being transmitted. In response to determining that the TS is received, a presence of EC between the first and second conductor points is reported, and in response to determining that the TS is not received, absence of EC between the first and second CPs, or a lack of electrical contact between the VMC and the first and/or second CP(s), is reported.

A method for detecting an electrical arc in an electrical system including analyzing a reflectogram representative of a spatial distribution of impedance in said electrical system and, when an electric arc is identified in the reflectogram, incrementing a detection counter by one unit.

A method for evaluating partial discharge signals. Partial discharge signals are captured, at only one point or at a plurality of points, near insulation of the electrical outer conductors of a multi-phase alternating current. The multi-phase alternating current, flowing in respective outer conductors, has fixed phase shifts relative to each other. Partial discharge signals are superposed on each other. At least one characteristic variable of the partial discharge signals is defined. Each partial discharge signal is assigned a phase position. A characteristic variable value of each characteristic variable is determined. Each partial discharge signal is assigned a number tuple from each characteristic variable value of the partial discharge signal and from the phase position. Clusters of the partial discharge signals in a multi-dimensional space with points formed by the number tuples are determined. A partial discharge activity is determined for each outer conductor from the determined clusters.

A method for evaluating partial discharge signals. Partial discharge signals are captured, at only one point or at a plurality of points, near insulation of the electrical outer conductors of a multi-phase alternating current. The multi-phase alternating current, flowing in respective outer conductors, has fixed phase shifts relative to each other. Partial discharge signals are superposed on each other. At least one characteristic variable of the partial discharge signals is defined. Each partial discharge signal is assigned a phase position. A characteristic variable value of each characteristic variable is determined. Each partial discharge signal is assigned a number tuple from each characteristic variable value of the partial discharge signal and from the phase position. Clusters of the partial discharge signals in a multi-dimensional space with points formed by the number tuples are determined. A partial discharge activity is determined for each outer conductor from the determined clusters.