A ground and test (G&T) device includes a test device housing having load and line conductors and a plurality of upper terminals and plurality of lower terminals carried by the test device housing and configured to engage the load and line conductors when the test device housing in installed within the compartment of the switchgear frame. A lower ground bus bar is carried by the test device housing and a plurality of grounding bars selectively connect either the upper terminals to the lower ground bus bar or connect the lower terminals to the lower ground bus bar. A ground shoe assembly is connected to the lower ground bus bar and configured to engage a grounding circuit carried by the switchgear frame.

A ground and test (G&T) device includes a test device housing having load and line conductors and a plurality of upper terminals and plurality of lower terminals carried by the test device housing and configured to engage the load and line conductors when the test device housing in installed within the compartment of the switchgear frame. A lower ground bus bar is carried by the test device housing and a plurality of grounding bars selectively connect either the upper terminals to the lower ground bus bar or connect the lower terminals to the lower ground bus bar. A ground shoe assembly is connected to the lower ground bus bar and configured to engage a grounding circuit carried by the switchgear frame.

A ground bus subassembly provided at a top (e.g., top front) of a power distribution cabinet section. The ground bus subassembly includes a first upper front frame plate, and a first ground bus section adjacent to the first upper front frame plate. A splice can attach to the first ground bus section. A ground cover covering the first ground bus section can function as a hoist rail. Ground bus subassemblies with first and second cabinet sections and first and second ground bus sections are provided, as are methods of assembly of ground bus subassemblies.

A controller controls a first inverter drive circuit and a second inverter drive circuit. The first inverter drive circuit drives a load having a load current larger than the second inverter drive circuit. The first inverter drive circuit includes a control ground terminal and a drive ground terminal which are isolated from each other. The ground terminal of the second inverter drive circuit is connected to the ground of the controller. The control ground terminal of the first inverter drive circuit is connected to the ground of the controller. The drive ground terminal of the first inverter drive circuit is connected to the negative side of the first inverter circuit.

An electrical device includes a housing that is intended to be mounted on a rail, and a monitoring and/or control module including a printed circuit board. In the configuration in which the electrical device is mounted on the rail, at least one ground terminal of the printed circuit board is permanently electrically connected to the rail by elastic mechanical bearing on and direct electrical contact with a connecting element, itself elastically mechanically bearing on and making direct electrical contact with the rail or with an elastic blocking member for elastically blocking the housing on the rail.

An electrical device includes a housing that is intended to be mounted on a rail, and a monitoring and/or control module including a printed circuit board. In the configuration in which the electrical device is mounted on the rail, at least one ground terminal of the printed circuit board is permanently electrically connected to the rail by elastic mechanical bearing on and direct electrical contact with a connecting element, itself elastically mechanically bearing on and making direct electrical contact with the rail or with an elastic blocking member for elastically blocking the housing on the rail.

The present invention is an apparatus and method for provisioning a compact power filter connection to a well-grounded connector in such a way as to include a capacitive and inductive circuit connection, extremely near the connector and filter, such that EMC compatibility is created in a space roughly 30% of traditional mechanisms and design approach to satisfy the aforementioned needs, provide the previously stated objects, include the above-listed features, and achieve the already articulated advantages. The present invention is carried out in a post-internal ferrite bead re-radiation noise-less manner, in a sense that ability to have noise introduced back onto a post-ferrite bead line has been greatly reduced.

The present invention is an apparatus and method for provisioning a compact power filter connection to a well-grounded connector in such a way as to include a capacitive and inductive circuit connection, extremely near the connector and filter, such that EMC compatibility is created in a space roughly 30% of traditional mechanisms and design approach to satisfy the aforementioned needs, provide the previously stated objects, include the above-listed features, and achieve the already articulated advantages. The present invention is carried out in a post-internal ferrite bead re-radiation noise-less manner, in a sense that ability to have noise introduced back onto a post-ferrite bead line has been greatly reduced.

A directional flow current transducer is used as a transient stray voltage detector including a first transducer providing an output signal indicating the magnitude of stray current carried by a new grounding wire, and a second, separate transducer providing an output signal indicating the direction of the stray voltage (for either direct and/or alternating stray voltages). The new grounding wire might be between an equi-potential plane of a concrete platform for watering livestock and a grounding bus bar for grounding the service bond of the main electrical service panel, at a significant distance from the watering platform. The output of the directional flow current transducer is recorded, stored and analyzed as a function of time. Preferably by allowing comparison with the output of a second directional flow current transducer, the system allows transient, directional and locational stray voltage/stray current problems to be better identified, understood and addressed.

A directional flow current transducer is used as a transient stray voltage detector including a first transducer providing an output signal indicating the magnitude of stray current carried by a new grounding wire, and a second, separate transducer providing an output signal indicating the direction of the stray voltage (for either direct and/or alternating stray voltages). The new grounding wire might be between an equi-potential plane of a concrete platform for watering livestock and a grounding bus bar for grounding the service bond of the main electrical service panel, at a significant distance from the watering platform. The output of the directional flow current transducer is recorded, stored and analyzed as a function of time. Preferably by allowing comparison with the output of a second directional flow current transducer, the system allows transient, directional and locational stray voltage/stray current problems to be better identified, understood and addressed.