摘要:
An installation tool comprising an elongated shaft having a threaded section and a blunt section, the tool having a threaded opening in one end and a hex opening in the other end. The installation tool is used to assemble a loadbreak reducing tap plug including a threaded mounting bolt mounted in the threaded end of the plug, and a threaded cable connector mounted in a visible-break "T" type connector housing, by the following method. Turning the threaded mounting bolt into the threaded opening of the installation tool. Turning the tool threaded section into the cable connector. Turning the tap plug into the cable connector. And removing the tool from the cable connector.
摘要:
An under oil expulsion fuse cartridge assembly includes a tubular housing of non-electrical conductive material, an electrically conductive contact removably threadedly mounted on each end of the housing, and a replaceable fuse assembly removably received within the tubular housing. One of the end contacts incorporates a pressure chamber providing a flushing and cleaning operation during the interruption process. The fuse assembly includes a fuse liner tube in a fuse link therein in the form of a flat ribbon element electrially connected to each of the end contacts. One end of the fuse link is mounted on a thin disc which includes a plurality of projecting lands that prevent direct engagement of the fuse link with the end contact to avoid breaking the fuse link. The fuse link also includes a plurality of holes formed therethrough covered by a eutectic material having a desired melting temperature so that current interruption occurs at a predetermined operating temperature.
摘要:
A low oil lock-out and/or trip apparatus for a submersible transformer circuit breaker of the type having a manually operated crank shaft assembly for opening and closing the circuit breaker and a fault trip assembly for opening the circuit breaker under fault current conditions, the apparatus including a float assembly which is responsive to changes in oil level in said transformer and a rod carried by said float for blocking the movement of the crankshaft and a trip member for tripping the trip assembly when the oil level drops below a predetermined level in the transformer.
摘要:
A manually actuable load break switch actuated having a base mounted on one end of a vacuum actuated switch, an operating lever pivotally mounted on the base and operatively connected to open and close the vacuum switch, a toggle mechanism connected to the end of the operating lever, the toggle member including a compression spring for biasing the operating lever to the closed position, a manually actuated handle pivotally mounted on said base for tripping the toggle mechanism by movement from one side of the toggle mechanism to the other, spring means operable connecting the handle to the toggle mechanism, and a lock pin biased into engagement with the end of the lever to lock the lever in the switch open position.
摘要:
A bayonet-type circuit breaker or under oil fuse device for completing the circuit from a high voltage bushing to an under oil transformer, the bayonet type device including a bayonet assembly having a circuit element at the end and a support assembly mounted on the transformer tank and having a tubular portion extending into the oil in the tank, the tubular portion including a pair of skirts at each contact location on the tubular portion and an elongate band of conductive spring metal material bent into a square configuration and having a number of spring fingers integrally formed along the axis of the band with a contact button on the free end of each finger, the band being mounted on the tubular portion of the support assembly between the skirts in a position to engage the circuit element, the inherent bias of the fingers holding the buttons in engagement with the contacts at each end of the circuit element.
摘要:
A continuous conductor pattern applied to a dielectric cooking utensil improves the distribution of microwave energy to the bottom surface of food being cooked. The energy is coupled from the electromagnetic field within the oven cavity by metal strip pickup probes on the hand grips or side walls which are part of the embedded metal layer. The conductor pattern on the bottom wall couples energy from the pickup probes to the central region of the utensil.
摘要:
A six rib spider assembly for a fuse including a dielectic housing having end caps for supporting the spider assembly within the housing and a fusable ribbon helically wound on the spider assembly, the housing being filled with a granular dielectic material. The spider assembly including three mica plates each having a number of notches in their longitudinal edges to define support surfaces along each longitudinal edge for the fusable ribbon. These support surfaces on each longitudinal edge being offset from the support surfaces on the opposite longitudinal edge as well as from the support surfaces on each of the other mica plates. Each plate also including at least one longitudinal slot intermediate the longitudinal edges of the plate with one of the plates including a second slot, whereby the plates can be cross fitted into each other with the plates angularly related so that the support surfaces define a helical path for the fusable ribbon.
摘要:
The unique, relatively nonflammable, environmentally safe, insulating oil comprises a saturated hydrocarbon oil having a molecular weight of about 500 to about 700, and a fire point above 200.degree. C. The electrical equipment comprises an oil-sealed tank, a unique insulating oil filling said tank, and an electrical component such as a conductive coil immersed in said insulating oil. A method of filling the oil-sealed tank of an electrical apparatus with the unique insulating oil also is disclosed.
摘要:
A temperature sensing transformer primary switch for a distribution transformer, the switch being mounted within the distribution transformer below the level of the dielectric fluid and being manually operable externally of the transformer for opening the primary circuit and deenergizing the transformer, the switch including a temperature sensing device mounted on the internal end of the transformer below the level of the dielectric fluid to open the primary switch in response to overload temperatures produced on the transformer's secondary circuit. The temperature sensing device includes a compression spring and a wax motor for releasing the energy stored in the compression spring as the temperature of the dielectric fluid reaches a predetermined maximum temperature. The spring is preloaded sufficiently by a manual operation to actuate the switch at the maximum temperature. A pressure responsive switch assembly is provided for opening the primary switch.
摘要:
A fused high voltage electrical bushing adapted to be mounted at the entrance in a casing to an electrical apparatus to provide a connection between a high voltage cable and the electrical apparatus, the bushing including a housing formed of a dielectric material and having an axially extending passage, an electrical terminal sealed to each end of said passage, a fusible element within said passage, interconnecting the terminals, and a granular dielectric material completely filling the passage; a layer of electrically conductive material is provided on the inner surface of said passage and extends through the entrance in the casing to the electrical apparatus, the inner layer of material being spaced from and electrically connected to the element, and a layer of electrically conductive material on the outer surface of said housing for forming a stress cone at the entrance of the casing to said apparatus, the stress cone being grounded through said casing, the inner and outer layers cooperating to reduce voltage stress at the point of entrance through the casing.