A testing device for testing a control unit of a switching device of an electrical switchgear installation. The testing device has a signal input, and to which a controlled current sink is provided, which is connected to the signal input. The controlled current sink shunts an input current from the signal input in order to provide a dynamically adjustable input impedance. A method for testing a control unit of a switching device of a switchgear installation, includes the testing device having a signal input, to which an input voltage may be applied. In the testing device, a controlled current sink shuts an input current from the signal input and thus provides a dynamically adjustable input impedance.

A remote blade closing detector switch is positioned on or near the jaws of an electric power disconnect switch, where proper seating of the blade in the jaws activates a detector switch. An extended conductor lead electrically connects the detector switch an RFID tag placed in a convenient reading location. The detector switch is configured to control a data signal, power to the antenna of the RFID tag, the power supply to the RFID tag, or a data signal between an RFID chip and an antenna as mechanisms for enabling and disabling the tag to report a status indicator. An antenna tuning compensator may be utilized to compensate for the impedance of the long conductor lead connected to the antenna. A noise filter may also be used to suppress electrical noise picked up by the long conductor lead in the harsh electrical environment of the disconnect switch.

A system includes a circuit interruption device, such as a circuit breaker, contactor or other switch of an automatic transfer switch (ATS) or a similar device providing power to an input of an ATS, and a monitoring circuit, such as a controller of the ATS, coupled to the circuit interruption device and configured to monitor voltages at inputs and outputs of the circuit interruption device, to monitor an auxiliary contact signal associated with auxiliary contacts of the circuit interruption device, and to determine a status of the auxiliary contacts responsive to the monitored voltages and auxiliary contact signal.

In order to test substations from different manufacturers and of different types in a simple manner, it is provided that a control unit (6) for a switching device (5) of a substation (4) is connected via an adapter cable (11) to a test device (10), which simulates the switching device (5) for the test and the test device (10) reads configuration-specific data from a memory unit (15) on the adapter cable (11) and the test unit (10) thus configures its signal inputs (BE) and signal outputs (BA, AA) that are required for conducting the test.

Systems and methods are provided to measure a voltage across a two-state dipole. The systems and methods measure voltages across two measurement paths of operational circuitry at first and second sensor terminals. The operational circuitry is configured to decouple the first and second sensor terminal based on a dipole voltage. The systems and methods further estimate the dipole voltage based on the voltages of the two measurement paths.

The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and can be used in the main circuit. This is different from the conventional single-switch commute-and-absorb method currently used. The present disclosure shows that disclosed circuit breaker improves the fault current extinction and significantly reduces the voltage rate-of-change while creating the current zero-crossing faster compared to the available technology. Thus, disclosed circuit breaker is capable of interrupting high DC currents with minimal arc through a less expensive AC circuit breaker. Simulation and hardware results are provided to show the efficiency of the disclosed circuit breaker.

A device for protecting a medium or high voltage electrical network is provided, including a base part connected to means for measuring values representative of the electrical network and to a trip circuit of the electrical network, an active part that includes means for analogue-digital conversion of the values representative of the electrical network and which is mechanically and electrically connected to the base part in a first position referred to as the normal position, and a removable test part that is mechanically and electrically connected to the active part in a second position referred to as the test position. The test part includes means for mechanically and electrically connecting to the base part such that, in the test position, external terminals of the test part are connected to the trip circuit through the base part.

Systems and methods are provided to measure a voltage across a two-state dipole. The systems and methods measure voltages across two measurement paths of operational circuitry at first and second sensor terminals. The operational circuitry is configured to decouple the first and second sensor terminal based on a dipole voltage. The systems and methods further estimate the dipole voltage based on the voltages of the two measurement paths.

Systems, devices, and related methods for automated testing of an automatic transfer switch. A device for testing an automatic transfer switch includes a primary power supply input, a controlled primary power output, a primary power source selection assembly, an output electrical power monitor unit, and a control input. The power source selection assembly is controllable to enable selective communication of electrical power received via the primary power supply input to the controlled primary power output. The output electrical power monitor unit is configured to monitor electrical power supplied to a connected load via the automatic transfer switch. The control input is operatively coupled with the primary power source selection assembly and the output electrical power monitor unit to enable control of the operation of the primary power source selection assembly via an external controller and to transfer output from the output electrical power monitor unit to the external controller.

A synthetic test circuit for testing a submodule performance in a power compensator includes a submodule test unit which is an object of testing the submodule performance, a current source and a controller. The current source is connected to the submodule test unit to supply a voltage to the submodule test unit such that a charging voltage having a capacity set in the submodule test unit is stored in order to operate the submodule test unit. The controller is configured to perform control to perform a submodule performance test of the submodule test unit using the stored charging voltage.