The electrical switch includes a first and a second fixed contact, and a movable knife contact including at least one longitudinal pair of blades being flexibly connected to each other, wherein the blades form, in a switching event, contact with contact portions of the first and/or the second fixed contact. Opposite surfaces of the contact portions of the first and the second fixed contact include a roughened area and the inner surface of each blade includes a protruded area or opposite surfaces of the contact portions of the first and the second fixed contact include a protruded area and the inner surface of each blade includes a roughened area.

The electrical switch includes two fixed contacts and a rotatable knife contact having a rotational axis and including at least one longitudinal pair of blades flexibly connected to each other. The two fixed contacts as well as the blades in the rotatable knife contact are of a first electrically conductive material composition. The first and the second fixed contact includes a first contact pin and outer ends in the blades in the rotatable knife contact includes a second contact pin. The first contact pin and the second contact pin are of a second electrically material composition, which is different from the first material composition. The first contact pin and the second contact pin pass over each other during a switching event.

The electrical switch includes two fixed contacts and a rotatable knife contact having a rotational axis and including at least one longitudinal pair of blades flexibly connected to each other. The two fixed contacts as well as the blades in the rotatable knife contact are of a first electrically conductive material composition. The first and the second fixed contact includes a first contact pin and outer ends in the blades in the rotatable knife contact includes a second contact pin. The first contact pin and the second contact pin are of a second electrically material composition, which is different from the first material composition. The first contact pin and the second contact pin pass over each other during a switching event.

The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.

A switch blocking device that is insertable into an open switch that prevents the switch from being closed, the device being sized and shaped to fit securely in a space between an open blade of the switch and fixed electrical contacts of the switch, the device having a handle that enables easy insertion and removal while also covering the live electrical blade.

A switch blocking device that is insertable into an open switch that prevents the switch from being closed, the device being sized and shaped to fit securely in a space between an open blade of the switch and fixed electrical contacts of the switch, the device having a handle that enables easy insertion and removal while also covering the live electrical blade.

A knife switch includes a switch housing, a conductive seat, a movable contact part, and a fixed contact part. The conductive seat, the movable contact part and the fixed contact part are disposed in the switch housing. One end of the movable contact part is electrically connected to the conductive seat. Another end of the movable contact part is formed with a conductive head. An outer surface of the conductive head is defined as a first conductive surface. An arc guide hole having a second conductive surface is disposed in the conductive head. The fixed contact part is provided with a contact finger to cooperate with the first conductive surface and an arc guide contact plate to cooperate with the second conductive surface. The knife switch can ensure the normal use of the main current path when the movable contact part and the fixed contact part are electrically connected.

A system includes a first group of cassettes, each cassette including a first stationary bar, a first plurality of fixed contact members, and a first plurality of movable contact members, each of which is electrically coupled and rotatably connected to the first stationary bar and configured to contact one of the first plurality of fixed contact members. The system includes a second group of cassettes each including a second stationary bar, a second plurality of fixed contact members, and a second plurality of movable contact members, each of which is electrically coupled and rotatably connected to the second stationary bar and configured to contact one of the second plurality of fixed contact members. The system includes at least one operating mechanism to control opening and closing of the movable contact members. The first stationary bar is coupled to the second stationary bar.

A contactor assembly is connected to a bus-bar of a main circuit-breaker. The assembly includes a housing including an opening defined therein; a contactor passing through the opening, wherein the contractor includes contacting portions projecting forwardly of the opening and coupled portions projecting rearwardly of the opening; a presser passing through the opening, wherein the presser is interposed between the contactor and the housing, wherein the presser is supported on the housing and presses the contacting portions and the coupled portions; and a connector coupled to the coupled portions of the contactor and electrically connected to the contactor.

A conducting switch mechanism includes a housing, an operating stem is exposed from the housing, a fixed terminal set, a movable terminal module, a fulcrum bar, and an elastic member. The fixed terminal set is fixed on a base of the housing, and includes a pair of constant contact terminals, a pair of first pathway terminals, and a pair of second pathway terminals. The movable terminal module has a first movable terminal, a second movable terminal, and an insulating member. The insulating member partially clads the movable terminals. The structures of movable terminals are integrally stamped. One end of the movable terminals correspondingly abuts against the constant contact terminals, and another end of the movable terminals correspondingly contacts the first pathway terminal or the second pathway terminal. The elastic member is connected between the fulcrum bar and the movable terminal module.