Abstract: An electric switch including a stationary contact that is annular. The switch comprises a gastight enclosure, a conductor bar of axis (D), a stationary contact presenting a contact zone of substantially annular shape, a switch element, e.g. on the conductor bar, that is movable in the axial direction of the axis (D) between a first position in which it penetrates in part into the stationary contact to establish electrical contact between the conductor bar and the stationary contact, and a second position in which it interrupts said contact. The stationary contact, which is in the form of a ring that is circular or elongate, such as elliptical, surrounds the conductor bar, at least in part.

Abstract: An electric switch including a stationary contact that is annular. The switch comprises a gastight enclosure (2), a conductor bar (8) of axis (D), a stationary contact (12) presenting a contact zone (22) of substantially annular shape, a switch element (40), e.g. on the conductor bar, that is movable in the axial direction of the axis (D) between a first position in which it penetrates in part into the stationary contact (12) to establish electrical contact between the conductor bar (8) and the stationary contact (12), and a second position in which it interrupts said contact. The stationary contact, which is in the form of a ring that is circular or elongate, e.g. elliptical, surrounds the conductor bar (8), at least in part.

Abstract: A high or medium voltage electrical switch, particularly a GIS type isolating switch with three switching positions and a grounding position, includes a switching element in a closed and sealed enclosure that can be filled with a dielectrically insulating gas, containing a mobile switching element free to move along an axial direction to electrically connect two conducting bars at intervals from each other, and also including a fixed ground contact to be electrically connected to one of the two conducting bars through the switching element when the switch is in the grounding position. The fixed ground contact is offset from the path of the switching element along the axial direction and the switching element forms a Y with a contact pin such that the contact pin and the fixed ground contact engage in each other through displacement of the switching element along the axial direction.

Abstract: A high or medium voltage electrical switch, particularly a GIS type isolating switch with three switching positions and a grounding position, includes a switching element in a closed and sealed enclosure that can be filled with a dielectrically insulating gas, containing a mobile switching element free to move along an axial direction to electrically connect two conducting bars at intervals from each other, and also including a fixed ground contact to be electrically connected to one of the two conducting bars through the switching element when the switch is in the grounding position. The fixed ground contact is offset from the path of the switching element along the axial direction and the switching element forms a Y with a contact pin such that the contact pin and the fixed ground contact engage in each other through displacement of the switching element along the axial direction.

Abstract: The capacitor of high thermal stability includes a high-voltage electrode (HT) extending in a longitudinal direction (AX), a cylindrical printed circuit (CI) coaxially surrounding said high-voltage electrode and including an electrically conductive track forming a low-voltage electrode (BT), and a frame (CH) having a cylindrical inside surface (SI) coaxially surrounding said cylindrical printed circuit (CI). The printed circuit is slit along a generatrix (G1) of the cylinder that it forms and it is rigidly fixed to the inside surface by a fixing point (F1, F2). The frame includes guide means (A1, A2) for holding said printed circuit (CI) near the inside surface (SI) whilst allowing it to expand along said inside surface of the frame. This provides a capacitor of high thermal stability and very simple construction which is suitable for carrying out measurements on a gas-insulated high-voltage electrical line.

Abstract: The three-position, gas-insulated, metal-clad electrical switch inside a metal casing includes first and second break contacts, a fixed grounding contact, and a switching element that is movable in an axial direction to interconnect the break contacts. The first and second break contacts and the fixed grounding contact are superposed in the axial direction, and the switching element is moved by a drive rod which passes through the fixed grounding contact, thereby enabling the switching element to occupy each of the three switching positions including a grounding position in which it connects the first break contact to the fixed grounding contact.

Abstract: The capacitor of high thermal stability includes a high-voltage electrode (HT) extending in a longitudinal direction (AX), a cylindrical printed circuit (CI) coaxially surrounding said high-voltage electrode and including an electrically conductive track forming a low-voltage electrode (BT), and a frame (CH) having a cylindrical inside surface (SI) coaxially surrounding said cylindrical printed circuit (CI). The printed circuit is slit along a generatrix (G1) of the cylinder that it forms and it is rigidly fixed to the inside surface by a fixing point (F1, F2). The frame includes guide means (A1, A2) for holding said printed circuit (CI) near the inside surface (SI) whilst allowing it to expand along said inside surface of the frame. This provides a capacitor of high thermal stability and very simple construction which is suitable for carrying out measurements on a gas-insulated high-voltage electrical line.

Abstract: The three-position, gas-insulated, metal-clad electrical switch inside a metal casing comprises first and second break contacts, a fixed grounding contact, and a switching element that is movable in an axial direction to interconnect said break contacts. The first and second break contacts and said fixed grounding contact are superposed in said axial direction, and the switching element is moved by means of a drive rod which passes through the fixed grounding contact, thereby enabling said switching element to occupy each of the three switching positions including a grounding position in which it connects the first break contact to the fixed grounding contact.

Abstract: A gas-blast insulated, encapsulated high-voltage switching installation with removable bus bars wherein the switching installation contains components consisting of housings with flanged connections and internal elements secured therein as partitions by means of conical support insulators and forming pressure gas tight compartments and wherein the bus bars contain disconnectors as well as dilatation elements. At each housing of the bus bar component there are provided two oppositely situated connection flanges and in each housing there is arranged an internal conductor element.