Abstract: A draw out circuit breaker has a reduced partial discharge in insulation surrounding a primary stab bus. A circular disk plate on one end of the bus includes tapped inserts located at a radial separation distance from the bus. An insulator sleeve surrounding the bus is formed to encapsulate the tapped inserts. Raised embosses on the circular disk plate separate the end portion of the insulator sleeve by a gap distance from the inward facing surface of the disk plate. The increased gap distance reduces formation of a triple point region between the surface of the disk plate and the insulator sleeve, thereby reducing occurrence of partial discharges in the insulator sleeve near the gap.

Abstract: A tank for a medium-voltage electrical unit that is intended to contain a gas under a pressure greater than atmospheric pressure, the tank having: a structure that has uprights, panels that are secured to the uprights, the panels being set up to receive a pressure force of the pressurized gas, at least one metal reinforcing rod extending in a longitudinal direction, the reinforcing rod connecting together two uprights so as to counter a deformation of the uprights under the action of the pressure force of the gas, at least one first electrically insulating tube, wherein at least one longitudinal portion of the reinforcing rod is surrounded by the first insulating tube, and wherein an inner surface of the first insulating tube is remote from a lateral surface of the reinforcing rod.

Abstract: A draw out circuit breaker has a reduced partial discharge in insulation surrounding a primary stab bus. A circular disk plate on one end of the bus includes tapped inserts located at a radial separation distance from the bus. An insulator sleeve surrounding the bus is formed to encapsulate the tapped inserts. Raised embosses on the circular disk plate separate the end portion of the insulator sleeve by a gap distance from the inward facing surface of the disk plate. The increased gap distance reduces formation of a triple point region between the surface of the disk plate and the insulator sleeve, thereby reducing occurrence of partial discharges in the insulator sleeve near the gap.

Abstract: A tank for a medium-voltage electrical unit that is intended to contain a gas under a pressure greater than atmospheric pressure, the tank having: a structure that has uprights, panels that are secured to the uprights, the panels being set up to receive a pressure force of the pressurized gas, at least one metal reinforcing rod extending in a longitudinal direction, the reinforcing rod connecting together two uprights so as to counter a deformation of the uprights under the action of the pressure force of the gas, at least one first electrically insulating tube, wherein at least one longitudinal portion of the reinforcing rod is surrounded by the first insulating tube, and wherein an inner surface of the first insulating tube is remote from a lateral surface of the reinforcing rod.

Abstract: A method for increasing the dielectric withstand strength in the enclosure E of an electrical apparatus, this method consisting in placing in the enclosure a dielectric material in liquid or solid form, then in bringing this material to a temperature and/or a pressure allowing for its total or partial evaporation in the enclosure. This method includes a device for retaining the abovementioned material in its container during the handling allowing the placement of the container in the enclosure E, and a device for inducing the evaporation of this material at a certain moment after this placement in the enclosure E and for allowing the dispersion of the gases resulting from this evaporation in the enclosure E.

Abstract: A method for increasing the dielectric withstand strength in the enclosure E of an electrical apparatus, this method consisting in placing in the enclosure a dielectric material in liquid or solid form, then in bringing this material to a temperature and/or a pressure allowing for its total or partial evaporation in the enclosure. This method includes a device for retaining the abovementioned material in its container during the handling allowing the placement of the container in the enclosure E, and a device for inducing the evaporation of this material at a certain moment after this placement in the enclosure E and for allowing the dispersion of the gases resulting from this evaporation in the enclosure E.

Abstract: An electrical equipment containment is arranged on a cooling enclosure opening out onto the outside. An outlet orifice makes the containment communicate with the cooling enclosure. This orifice is closed by a membrane or a check valve. A grate separates the cooling enclosure into an upper volume and a lower volume. The grate supports a layer of solid granular material the upper surface whereof remains free. This material is preferably porous and also comprises dusts. In the event of an internal electric arc, the shock wave escaping from the containment is dampened by the surface deformation of the layer of solid material. The incandescent particles projected via the opening are stopped by the layer of solid material. The hot gases are cooled as they flow through the material, causing a cloud of dust contributing to preventing any post-combustion.

Abstract: An electrical equipment containment is arranged on a cooling enclosure opening out onto the outside. An outlet orifice makes the containment communicate with the cooling enclosure. This orifice is closed by a membrane or a check valve. A grate separates the cooling enclosure into an upper volume and a lower volume. The grate supports a layer of solid granular material the upper surface whereof remains free. This material is preferably porous and also comprises dusts. In the event of an internal electric arc, the shock wave escaping from the containment is dampened by the surface deformation of the layer of solid material. The incandescent particles projected via the opening are stopped by the layer of solid material. The hot gases are cooled as they flow through the material, causing a cloud of dust contributing to preventing any post-combustion.