Abstract:
A fuse link used in alternate current medium- or high-voltage systems with a current frequency of 50 Hz includes a spring-type striker pin and is designed for the protection of electrical devices against consequences of short circuits and overloads. A porcelain housing with a star-core, external end caps closed by plugs, star-core end caps with a ring-shaped first tap designed to ensure electric contact between the star-core end cap and the external end cap of the fuse link is also included. A spring-type striker pin is positioned along the axis of the star-core. Each of the end caps of the star-core is provided with an additional second tap designed to centre the star-core relative to the axis of the fuse link. The spring-type striker pin is centred along the longitudinal axis of the fuse link.
Abstract:
An electric device is disclosed. In an embodiment, the device includes an electric element having an element terminal and a conductive spring being deflected, the spring being electrically coupled to the element terminal by a fusible joint. The device further includes a switch including a first monitor terminal and a second monitor terminal, the switch having a state that is changeable between a first connection state, where the first monitor terminal and the second monitor terminal are electrically coupled, and a second connection state, where the first monitor terminal and the second monitor terminal are electrically decoupled, and wherein the electrical device is configured such that when the joint fuses, the spring relaxes, thereby decoupling the spring and the element terminal and changing the state of the switch.
Abstract:
The invention relates to a fuse system for a switchgear assembly, especially for a medium voltage switchgear assembly. The fuse system comprises a plurality of fuses which correspond to the number of phases, every fuse having a tripping bar that projects from the face of the fuse under the effect of the force of a spring when the fuse comes into action. A sealing body, with a spring arrangement interposed, pushes a sealing head into the interior of a receptacle receiving the fuse. A two-armed lever is received on the sealing head, one arm covering a tripping mechanism which actuates a power switch.
Abstract:
The invention relates to a fuse system for a switchgear assembly, especially for a medium voltage switchgear assembly. The fuse system comprises a plurality of fuses which correspond to the number of phases, every fuse having a tripping bar that projects from the face of the fuse under the effect of the force of a spring when the fuse comes into action. A sealing body, with a spring arrangement interposed, pushes a sealing head into the interior of a receptacle receiving the fuse. A two-armed lever is received on the sealing head, one arm covering a tripping mechanism which actuates a power switch.
Abstract:
The impact signaling system (9) is used in a high-voltage protective device and has a housing (13), a spring (16) which is arranged in the housing (13) and has a moveable end, an actuator (17) which can be passed out of the housing (13) and interacts with the moveable end of the spring (16), a high-resistance resistor wire (12) which is connected in parallel with a fusible wire of the protective device, and a holder which absorbs the prestress of the spring (16). The holder contains a section of the high-resistance resistor wire (12) which is in the form of a winding (18) and is passed at least once around the moveable end of the spring (16) in order to form the prestress, and which is at least partially in thermally conductive contact with the material of the activator (20). Above a limit temperature, the activator (20) lifts, for example by destruction of the winding (18) or by melting through, the holder and activates the impact signaling system (9) by reducing the load on the spring (16).
Abstract:
A fused disconnect switch includes at least one switch housing assembly having a housing defining a fuse receptacle and first and second terminal contact assemblies extending therefrom. At least one of the first and second contact assemblies is a bullet contact assembly, and a retractable fuse is received within the fuse receptacle. The fuse includes a primary fuse link and an open fuse indication device.
Abstract:
A fused electrical disconnect device includes a housing defining a cartridge receptacle. A line interface and a load interface are disposed within the receptacle. A line terminal extends into the body and is in electrical communication with the line interface. A load terminal also extends into the body and is in electrical communication with the load interface. A fuse holding cartridge is removably insertable into the cartridge receptacle and releasably accommodates a load protection fuse. The fuse holding cartridge establishes an electrical current path between the line and load interfaces when the fuse holding cartridge accommodates a load protection fuse and is inserted into the cartridge receptacle. An alarm signal circuit is also in electrical communication with the line and load terminals. The alarm signal circuit generates an alarm signal when the electrical current path is interrupted and the line and load terminals are electrically coupled to a power source and a load respectively.
Abstract:
A fused disconnect switch assembly includes a pull out fuse assembly and a switch housing assembly. The fuse assembly includes a line side conducting portion, a load side conducting portion, and a fuse element therebetween. The switch housing assembly includes a fuse receptacle for receiving the fuse, a first contact assembly coupled to the line side conducting portion of the fuse and a second contact assembly coupled to the load side conducting portion of the fuse when the fuse is inserted into the receptacle. An open fuse indication device is in communication with conducting portions of the fuse, and an alarm terminal output extends from the switch assembly housing and is in communication with the open fuse indication device. The open fuse indication device provides local fuse state indication and the alarm terminal output facilitates remote fuse state indication when coupled to external circuitry.
Abstract:
A fuse holder for flat mounting on the edge surface of a printed circuit board comprises a compartment for receiving a fuse assembly; coterminous contact pins which are locked in position and which can be inserted in corresponding apertures on the surface of the board and two locating bosses for anchoring the fuse holder on the board when the pins are inserted in said apertures and soldered.
Abstract:
A fuse carrier has a circuit-closing member that can be moved by the switch-actuating plunger of a fuse which is held by clips on that fuse carrier. A stop on that fuse carrier lies in the path of a protuberance on one terminal of that fuse, and thereby maintains a minimum distance between that terminal and that circuit-closing member. That stop also coacts with an abutment, within an elongated recess in the fuseholder for that fuse carrier, to keep that fuse carrier from being inserted into that recess while it is in its inverted position. A surface adjacent one of the clips and an open area adjacent the other of the clips on the fuse carrier coact with the protuberance on the one terminal of the fuse to keep that fuse from being fully seated within those clips unless that fuse is correctly oriented relative to the circuit-closing member.