Abstract: A base member includes a terminal fixing part for blocking an entire surface of an opening part of a housing at a position further inner than an opening end part of the housing when the base member is inserted in the housing. A first electrode part formed by a tip part of two bent stages that are composed of a horizontal part, a vertical part, and a horizontal part and configured by bending a portion of a part of the fixed side fixed a conductive member, which is continuous with a first external connection terminal, in a direction perpendicular to a continuous direction.

Abstract: A disconnector for electric power equipment filled with dielectric liquid, especially transformers, applicable in protecting the operation of electric power equipment. The disconnector contains at least two cylindrical current-limiting fuses situated inside a tank, and each fuse is electrically connected with external phase power supply and through fixed contacts and moving contacts of the disconnector with the active part of the piece of electric power equipment. The disconnector is characterized in that the current-limiting fuses are placed in a common housing, in which a slide with a pilot is situated, and to the slide there are inseparably fixed moving contacts, which move together with the slide when the slide makes a to-and-fro motion. The to-and-fro motion takes place as a result of the operation of a tripping device situated in the current-limiting fuses and of the compression or stretching of springs fixed to the pilot and to a fixing disk.

Abstract: A multi-pole load break switch having two sets of contacts in each pole connected in series to isolate its fuse. Also disclosed is a circuit incorporating the switches of the invention in a double-ended switch board having two power supplies normally isolated from each other.

Abstract: A polyphase circuit fuse condition indicating device includes three substantially identical circuits forming a Y-connection across each fuse through first and second leads. Each circuit has an indicator light and a switch with resistors in the leads. The respective circuits are interconnected through a lead having a resistance for each circuit so that an indication will be rendered without a load across the fuse.

Abstract: A polyphase interrupter includes an electric fuse in series with each phase, a phase grounding conductor electrically connected with each phase and movably mounted adjacent and electrically connected with a terminal of each fuse, biasing means arranged to impart individual grounding movement to each phase grounding conductor, latch means normally in engagement with each phase grounding conductor for preventing grounding movement thereof, actuating means associated with each of said fuses and movable into releasing engagement with the associated latch means in response to current interrupting operation of the associated fuse, and coupling means interconnecting all of said latch means for imparting simultaneous releasing movement thereby to effect grounding and interruption of all phases in response to interruption in one phase.

Abstract: A modular switch-fuse unit is provided which can be engaged via terminals 26 with a busbar supply system. The unit is divided into a switch compartment 14 and a fuse compartment 16, the latter having an access door 36 which is normally blocked by operating handle 38 when in the "on" position. Handle 38 is provided with a semi-concealed latch 64 allowing access to the fuses 32 when live.

Abstract: Disclosed is an interrupter switch mechanism for interrupting current flow in a high voltage electrical circuit. A tubular switch blade is mounted for linear movement to engage and disengage a stationary contact. A spring is positioned within the hollow interior of the tubular switch blade so that it can be biased in either direction by sliding plugs also positioned within the tubular switch blade. The sliding plugs include pins which engage a slot in a plate member so that movement of the plate member in either direction causes one or the other of the plugs to move to bias the spring in that direction. The plate member has gear teeth formed thereon for engaging mating teeth on a tool engaging disk. The tool engaging disk has an opening therein for engaging the end of an insulated tool which may be rotated to operate the mechanism. The plate member also has cam surfaces which engage first and second cam follower members to cause these cam follower members to pivot.