A circuit assembly includes a sealable enclosure and at least one electronic circuit element contained within the sealable enclosure. The at least one electronic circuit element includes a control circuit, a garnet, and a first polymer material applied on a surface of the control circuit and on a surface of the garnet. A second polymer material fills a remaining space defined within the enclosure, the second polymer material applied on an exposed surface of the first material.

A system and method for a pole separating arrangement for a multipole pantograph or a multipole fixed arrangement for charging an electric vehicle includes a first conducting pole arranged on an isolating carrier and configured for contacting a corresponding first pole on the electric vehicle; a second conducting pole arranged on the isolating carrier and configured for contacting a corresponding second pole on the electric vehicle; and an isolating pole separator arranged between the first conducting pole and the second conducting pole. The pole separator has at least one upward pointing arc.

A method for preventing corona effects in an electronic circuit comprising applying a coating of a first material to a surface of the electronic circuit, and applying a second material having a dielectric constant that is lower than that of the first material on an exposed surface of the first material, wherein the second material comprises a solid dielectric.

A method for preventing corona effects in an electronic circuit comprising applying a coating of a first material to a surface of the electronic circuit, and applying a second material having a dielectric constant that is lower than that of the first material on an exposed surface of the first material, wherein the second material comprises a solid dielectric.

An insulator for electrically insulating an electrical conductor. The insulator includes a roll defining a central longitudinal through hole along a longitudinal axis of the insulator. The through hole is arranged for allowing an electrical conductor to pass there through. The insulator also includes at least one shed arranged on an outer surface of the roll. The shed includes a shed tip having an outer non-flat curvature defined by a plurality of different radii of curvature and including a most distal point of the shed. An end radius of curvature at the most distal point of the curvature is larger than a first radius of curvature at one side of the most distal point and a second radius of curvature at the other side of the most distal point.

An insulator for electrically insulating an electrical conductor. The insulator includes a roll defining a central longitudinal through hole along a longitudinal axis of the insulator. The through hole is arranged for allowing an electrical conductor to pass there through. The insulator also includes at least one shed arranged on an outer surface of the roll. The shed includes a shed tip having an outer non-flat curvature defined by a plurality of different radii of curvature and including a most distal point of the shed. An end radius of curvature at the most distal point of the curvature is larger than a first radius of curvature at one side of the most distal point and a second radius of curvature at the other side of the most distal point.

Described herein is a protective cover assembly for an electrical cable mounted on an insulator. The assembly includes an insulator cover including a cover body covering the electrical cable and the insulator and an electrically conductive arc diverter. The arc diverter is elongated in an axial direction that is parallel to a center axis of the electrical cable and is attached to an outer surface of the electrical cable at a portion of the electrical cable that is covered by the insulator cover such that a portion of the arc diverter is positioned below and covered by the insulator cover and another portion of the arc diverter extends past a terminal end of the insulator cover with an end of the arc diverter being spaced apart from the terminal end of the insulator cover in the axial direction.

A passive arc control system for a motor control center 60 includes an arc attenuating box having sides separating adjacent vertical bus bar phases 54, providing a physical barrier to arc flash energy. The box is open at its top and bottom forming a chimney 55. A shutter assembly for each box includes an insulator cap 62 on a free end of the bus bar and an independently moveable, box-shaped shutter 64 that slides along the bus bar away from the insulator cap, when a device is connected to the bus bar. The shutter has an opening 65 through which the bus bar passes when the device is connected to the bus bar and an opening 55′ aligned with the box's chimney. The arc control system provides a high degree of arc protection for personnel working around open motor control centers and is highly modular and easy to construct.

A passive arc control system for a motor control center 60 includes an arc attenuating box having sides separating adjacent vertical bus bar phases 54, providing a physical barrier to arc flash energy. The box is open at its top and bottom forming a chimney 55. A shutter assembly for each box includes an insulator cap 62 on a free end of the bus bar and an independently moveable, box-shaped shutter 64 that slides along the bus bar away from the insulator cap, when a device is connected to the bus bar. The shutter has an opening 65 through which the bus bar passes when the device is connected to the bus bar and an opening 55′ aligned with the box's chimney. The arc control system provides a high degree of arc protection for personnel working around open motor control centers and is highly modular and easy to construct.

A post insulator includes an insulating post including a first end and a second end that are opposite to each other, a high-voltage-end grading ring connected to the first end of the insulating post, the high-voltage-end grading ring being insulated from the insulating post, a grounding-end grading ring connected to the second end of the insulating post, the grounding-end grading ring being insulated from the insulating post, and a charge control ring disposed on an outer surface of the insulating post, the charge control ring being insulated from the insulating post, and the charge control ring being configured to accumulate surface charges.