Abstract: A whip usable in a high tension section switch, in particular a vertically-opening switch, the whip comprising a flexible metal rod whose section is a truncated circle whose area diminishes progressively from the base of the whip to its tip.

Abstract: A disconnecting switch for a high voltage electrical substation, including a plurality of articulated arms pivotally connected together to define a movable system, one end of the movable system connected to a stationary support. The switch includes a contact head connected to an opposite end of the movable system, a main conducting bar suspended from a high voltage conductor, such that the contact head is movable between the main conducting bar and the stationary support via the movable system, and a stationary arcing contact electrically connected to the main conducting bar.

Abstract: A combined disconnecting and grounding switch for high voltage use. A space-saving arrangement providing for automatic grounding when the switch is in an open circuit position. The disconnecting and grounding switch including a connection contact connectable with a contact having a high voltage potential wherein the contacts are vertically arranged one over the other. The switch also includes a switch rod designed to be vertically displaceable in its longitudinal direction. The switch rod has an upper conductive section and an adjoining lower non-conductive section. The switch rod can be moved up or down by a driving arrangement including a threaded shaft driven by a motor and a traveling nut assembly cooperating with the threaded shaft.

Abstract: An electric switch of the by-pass type having a pair of main fixed contacts insulated from each other which cooperates with a pair of main movable contacts which are insulated from each other is provided with a by-pass switch for electrically connecting and disconnecting the main fixed contacts on which a latch is movably mounted and having a part engageable with a fixed latch engaging element so as positively to lock the by-pass switch in closed position, the latch being operated by an actuator mounted on and movable with the main movable contacts for imparting latching movement to the latch in coordination with opening of the main movable contacts. Conversely the actuator unlatches the latch in coordination with closing movement of the main movable contacts.

Abstract: An insulating support column is provided for driving interrupting units and includes an insulator having a longitudinal bore extending therethrough, a translational operating member extending through and outside of both ends of the insulator, and sealing arrangements between the operating member and the insulator to retain insulating material within the insulator and to seal the bore from the external environment. The insulating support column is disposed substantially vertically during operation to drive the interrupting unit. The operating member includes a first portion of insulative material and metallic portions that are affixed at each end of the first portion. The lower metallic end portion of the operating member includes a connector that is driven by a power train and the upper metallic end portion includes a connector that is connected to drive an interrupting unit. An end fitting is affixed to each end of the insulator.

Abstract: This telescopic isolating switch is made from nestable tubular members (10, 11', 12') including a base member (10) connected to an electrical connection point, intermediate members (11', 12'), and an end member supporting an electrical contact. Each intermediate member (11', 12') contains two pulley wheels (110, 111) fixed close to respective ends thereof, together with an endless loop (114) passing over the two pulley wheels (110, 111) inside the member and attached at two diametrically opposite points (116, 117) to the ends of the two adjacent members (10, 12'). The lower pulley wheel (110) of the intermediate member (11') which is adjacent to the base member (10) being driven through the base member (10) by means of a gear system slidingly engaged on a rotary fluted shaft (104) which is fixed inside the base member (10) and which is driven by a drive motor.

Abstract: A switch for making and breaking a connection between a load circuit and a power line, with two parallelogrammatic linkages terminating in scissorlike contactor pairs, has limitedly swivelable and/or extensible cross-links interconnecting aligned pivotal junctions of the two linkages to provide them with a certain relative mobility. In an operating position, part-cylindrical armatures detachably secured to the two contactor pairs grip respective portions of an elongate countercontact fixedly suspended between a pair of rings attached to the power line, this countercontact comprising a metallic supporting tube also provided with part-cylindrical armatures in the region of the contactor pairs. Each armature may comprise several metallic layers on a base of copper, namely an inner layer of silver, a protective layer of tin on top thereof, and an outer silver layer. The armatures could also be made, at least in part, of a scorchproof material such as silver/cesium oxide.

Abstract: A switch for making and breaking a connection between a load circuit and a power line includes a stationary metal bar mechanically and conductively connected to the power line and a scissorlike contactor pair gripping the bar in a closure position. The bar is flanked by two metallic guard elements in the shape of elastic rods that are first engaged by the contactors upon closure and last disengaged from them upon opening of the switch. In the closure position, in which the contactors also engage the bar, the two rods are connected to that bar through a circuit breaker formed by two metallic spurs which separate during a disconnect operation after the contactors have disengaged the bar but while they are still in engagement with the rods whereby any arcing will occur only between scorchproof contact zones of these spurs.