Abstract:
A vacuum type circuit interrupter is provided having separable mating contacts. Multiple arc rails are attached to each contact, the arc rails extend from the contact to which they are attached past the mating contact. The arc rails extend from the contact in a direction substantially parallel to the supporting rod means of the mating contact, so as to provide paths between the arc rails and the supporting rod means along which an arc formed during circuit interruption can travel.
Abstract:
A vacuum type circuit interrupter is provided having a contact structure comprising separable mating contacts. The contact structure is constructed so that the mating contacts close on a first material and open on a second material. The first material on which the mating contacts close is made from weld free material so that contact welding does not occur when the vacuum interrupter is closed. The second material on which the contacts open, possesses good contact opening characteristics and interrupting that is, opening of the contacts will occur without excess current chopping.
Abstract:
A power switching apparatus comprising a vacuum interrupter assembly and a switching assembly connected in parallel between a pair of terminals, each of the terminals being connectable in use to an electrical circuit. The vacuum interrupter assembly includes at least one vacuum interrupter having a pair of electrically conductive rods connected at a first end to a respective one of the terminals and extending at a second end into a vacuum tight enclosure. A first electrode is mounted at or near the second end of a first of the electrically conductive rods and a slotted coil including a support base mounted at or near the second end of a second of the electrically conductive rods. A second electrode is mounted on an inner surface of the slotted coil and a third electrode is mounted on the support base. The second ends of the electrically conductive rods extend into the vacuum tight enclosure such that the first and third electrodes define opposed contact surfaces and at least one of the electrically conductive rods is movable relative to the other to open or close a gap between the opposed contact surfaces. The switching assembly includes at least one crossed-field plasma discharge switch that does not carry any current in its open state and conducts and carries current in its closed state. The switching assembly is controllable to switch between open and closed states to modify, in use of the power switching apparatus, a current flowing through the vacuum interrupter assembly.
Abstract:
A vacuum arc interrupter that includes a vacuum chamber assembly and a pressure chamber assembly. The vacuum chamber assembly includes a first, fixed contact disposed within the vacuum chamber and a second, movable contact disposed within the vacuum chamber. A rod is coupled to, and in electrical communication with, the second contact. The rod is structured to move between a first position wherein the second contact is spaced from the first contact and a second position where the first and second contacts are in electrical communication with each other. The pressure chamber assembly has a gas generation device and a cylindrical barrel defining a pressure chamber with a first end and a second end. The barrel second end has an opening. A piston assembly is disposed in the pressure chamber and coupled to the rod, which passes through the second, open end. The gas generation device is coupled to the pressure chamber assembly and in fluid communication with the barrel and the piston assembly. Upon generation of a gas by the gas generation device, the piston moves within the barrel causing the rod to move from the first position to the second position.
Abstract:
A vacuum arc interrupter that includes a vacuum chamber assembly and a pressure chamber assembly. The vacuum chamber assembly includes a first, fixed contact disposed within the vacuum chamber and a second, movable contact disposed within the vacuum chamber. A rod is coupled to, and in electrical communication with, the second contact. The rod is structured to move between a first position wherein the second contact is spaced from the first contact and a second position where the first and second contacts are in electrical communication with each other. The pressure chamber assembly has a gas generation device and a cylindrical barrel defining a pressure chamber with a first end and a second end. The barrel second end has an opening. A piston assembly is disposed in the pressure chamber and coupled to the rod, which passes through the second, open end. The gas generation device is coupled to the pressure chamber assembly and in fluid communication with the barrel and the piston assembly. Upon generation of a gas by the gas generation device, the piston moves within the barrel causing the rod to move from the first position to the second position.
Abstract:
A vacuum arc interrupter that includes a vacuum chamber assembly and a pressure chamber assembly. The vacuum chamber assembly has a first conductor coupled to a power line, a non-conductive housing and a seal cup. The pressure chamber assembly has a second conductor coupled to a ground, a pressure chamber and a bullet assembly. The pressure chamber assembly is disposed adjacent to the vacuum chamber assembly. The bullet assembly is disposed in the pressure chamber and is structured to move between a first position and a second position. The bullet assembly has a metal lance with a blade portion. The blade portion is structured to puncture the seal cup.
Abstract:
A vacuum arc interrupter that includes a vacuum chamber assembly having a first conductor and a pressure chamber assembly having a second metal conductor, with an opening, and a bullet assembly. The first conductor is coupled to a power line and the second conductor is coupled to a ground. The bullet assembly has a metal lance structured to engage the opening. The lance is shaped to create an arc when engaging the opening so that the second conductor and the lance are welded together.
Abstract:
A contact element for a power switch which, in order to open or close the switch, cooperates with an opposite element, with a transitory rotating electric arc forming between the contact element and the opposite element when the switch is operated. The contact element has an electrode part which includes a portion made of an electrically conductive material. This portion defines a contact surface, with the electrode part having a defined width and being curved in the direction of the width to have the form of an open loop having a connecting end and a free end. A current may be introduced approximately tangentially to the open loop at its connecting end, and the free end is spaced from the connecting end in the direction toward the interior of the loop by a distance which is less than the defined width.
Abstract:
Contact arrangement for vacuum switch in which one of two contacts is movable relative to the other in the axial direction of the contacts and is designed as a recessed contact. According to the invention, a condensation plate with a diameter greater than the inside diameter at the rim of the recessed contact is provided between the other contact and its current lead. The sidewall of the recessed contact forms a guide ring for the metal vapor, a substantial part of which condenses on the condensation plate.