Abstract: A chimney assembly is provided for an electrical switching apparatus, such as a circuit breaker including a housing and a number of poles. The chimney assembly includes a frame, an intake, a duct and an exhaust. A first side of the frame is coupled to the circuit breaker housing proximate the poles of the circuit breaker, and the intake and exhaust are respectively disposed at first and second ends of the frame. A first portion of the duct is coupled to the circuit breaker housing above the poles, and a second portion is coupled to the first side of the frame. The chimney assembly draws a volume of air through the intake into the circuit breaker housing, circulates the volume of air through the poles of the circuit breaker, and discharges the volume of air out of the circuit breaker housing through the duct and the exhaust.

Abstract: A busway fitting wherein the switch and/or fuse are disposed in a horizontal orientation. As the switch assembly and/or fuse are disposed in a horizontal orientation, the buses coupled to the switch assembly and/or fuse also extend horizontally. As such, the buses coupled to the switch assembly and/or fuse occupy a reduced amount of space. In this configuration, the transition buses may extend in a generally horizontal direction and, as such, the size of the busway fitting may be reduced.

Abstract: A power circuit includes a first low voltage power bus, a second low voltage power bus, a fuse electrically connected between the first low voltage power bus and the second low voltage power bus, and a fuse barrier. The fuse has a non-interrupted state and an interrupted state. The fuse barrier includes a spring having a first end and a second end, a fastener connecting the first end of the spring to one of the first low voltage power bus and the second low voltage power bus, and an insulating barrier. The insulating barrier is disposed from the second end of the spring. The insulating barrier engages a portion of the fuse in the non-interrupted state thereof. The spring drives a portion of the insulating barrier through the fuse in the interrupted state thereof.

Abstract: A network protector bus assembly, which is structured to be coupled to a roll-out circuit breaker having a plurality of quick disconnect assemblies, includes a line buss assembly and a load bus assembly. The line bus assembly has three elongated bus sub-assemblies, each with a stab extending generally perpendicular to the longitudinal axis of the line bus sub-assemblies. Each line bus sub-assembly stab has a width sufficient to accommodate at least two circuit breaker quick disconnect assemblies. Similarly, the load bus assembly has three elongated bus sub-assemblies, each with a stab extending generally perpendicular to the longitudinal axis of the load bus sub-assemblies. Again, each load bus sub-assembly stab has a width sufficient to accommodate at least two circuit breaker quick disconnect assemblies.

Abstract: An electrical connector may be utilized to connect bus bars having a wide variety of configurations to a wide variety of electrical equipment, without modification to the bus bars, electrical equipment, or connector, with the exception of cutting the electrical connector to a desired length.

Abstract: An electrical connector may be utilized to connect bus bars having a wide variety of configurations to a wide variety of electrical equipment, without modification to the bus bars, electrical equipment, or connector, with the exception of cutting the electrical connector to a desired length.

Abstract: An improved fuse housing includes a main body and a cover and is configured to receive a fuse. The main body includes a plurality of fins that are configured to increase the surface area of the fuse housing in order to enhance heat dissipation. The main body is formed with a cavity for the fuse and a pair of conductors extending between the interior of the fuse housing and the exterior thereof for connection with the fuse. The cavity is configured to minimize the quantity of air between the fuse and the fuse housing to facilitates heat transfer. Each conductor includes excess studs for connection with the fuse to enhance heat conduction from the fuse. The cover is fastened to the main body with sufficient fasteners to permit the cover to be a stressed member to resist fracturing of the fuse housing from magnetic and other forces from the conductors.

Abstract: A removable clamp assembly for a network protector bus, the network bus having at least one opening therethrough. The clamp assembly is structured to couple the network protector bus to a vault bus. The clamp assembly includes a mounting bracket structured to be removably coupled to the network protector bus and a gripping assembly for selectively gripping the vault bus. The gripping assembly is coupled to the mounting bracket.

Abstract: A removable clamp assembly for a network protector bus, the network bus having at least one opening therethrough. The clamp assembly is structured to couple the network protector bus to a vault bus. The clamp assembly includes a mounting bracket structured to be removably coupled to the network protector bus and a gripping assembly for selectively gripping the vault bus. The gripping assembly is coupled to the mounting bracket. The gripping assembly includes threaded tubes surrounding a rod with opposite threads at each end for driving the tubes, whereby the gripping fingers on the gripping assembly are movable to grip the vault buss blocks.

Abstract: A housing assembly for network protector fuses that includes a first and second C-shaped body and one or more cover plates. The first C-shaped body has a generally flat, rectangular front side and generally perpendicular first extension and second extension. The second C-shaped body has a generally flat, rectangular back side and generally perpendicular third extension and fourth. The first and second C-shaped bodies are coupled together forming an enclosure. The first body has one or more openings on the front side. The cover plates are coupled to the first C-shaped member and sealingly disposed over the openings in the first C-shaped body. The front side and the back side have a length sufficient to enclose more than one network protector fuse.

Abstract: A bus assembly for a network protector, where the network protector includes a housing, and where the bus assembly includes a plurality of busses having laminations and a rack assembly. The plurality of busses are mounted in the rack assembly and the rack assembly is coupled to the housing.

Abstract: An improved fuse housing includes a main body and a cover and is configured to receive a fuse. The main body includes a plurality of fins that are configured to increase the surface area of the fuse housing in order to enhance heat dissipation. The main body is formed with a cavity for the fuse and a pair of conductors extending between the interior of the fuse housing and the exterior thereof for connection with the fuse. The cavity is configured to minimize the quantity of air between the fuse and the fuse housing to facilitates heat transfer. Each conductor includes excess studs for connection with the fuse to enhance heat conduction from the fuse. The cover is fastened to the main body with sufficient fasteners to permit the cover to be a stressed member to resist fracturing of the fuse housing from magnetic and other forces from the conductors.

Abstract: A spring-biased electrical connector permits the connector to be moved into a retracted position for installation and removal of the components to which the connector is attached, and then extended to form an electrical connection with its mating connector. The spring-biased connector may be secured in electrical connection with its mating connector. Such a spring-biased connector is particularly useful for connecting a control relay to a network protector, although not limited to such use.

Abstract: A cable trip assembly includes an actuating assembly, a mounting assembly, and a cable assembly. The cable assembly includes a cable member disposed within a sheath. The cable member has a first end and a second end. The cable member first end is coupled to a lever, which is part of the actuating assembly, which is structured to move between a first position and a second position, similar to the prior art lever. The cable member second end is coupled to the circuit breaker trip bar. The sheath is mounted on a rigid frame, preferably a portion of the circuit breaker. Thus, with the sheath held stationary, the lever can move the cable within the sheath between a first and second position as the lever moves between its first position and second position. Because the cable member second end is coupled to the circuit breaker trip bar, the trip bar is also moved between the trip bar first and second positions as the lever moves between the lever first position and second position.

Abstract: A cable trip assembly includes an actuating assembly, a mounting assembly, and a cable assembly. The cable assembly includes a cable member disposed within a sheath. The cable member has a first end and a second end. The cable member first end is coupled to a lever, which is part of the actuating assembly, which is structured to move between a first position and a second position, similar to the prior art lever. The cable member second end is coupled to the circuit breaker trip bar. The sheath is mounted on a rigid frame, preferably a portion of the circuit breaker. Thus, with the sheath held stationary, the lever can move the cable within the sheath between a first and second position as the lever moves between its first position and second position. Because the cable member second end is coupled to the circuit breaker trip bar, the trip bar is also moved between the trip bar first and second positions as the lever moves between the lever first position and second position.

Abstract: A conductive heat sink is electrically interposed between a fuse and a switching apparatus within a watertight case of a network protector. The heat sink is advantageously configured to conduct current between the switching apparatus and the fuse. During operation, the skin effect causes the electricity conducted by the heat sink to flow primarily through the outer regions of the heat sink, thereby resulting in the generation of heat at the outer regions of the heat sink due to electrical resistance. The heat sink includes a core from which a plurality of fins extend. The fins conduct and convect heat away from the outer regions of the heat sink, which reduces the temperature thereof and correspondingly increases the conductivity of the outer regions of the heat sink.

Abstract: A conductive heat sink is electrically interposed between a fuse and a switching apparatus within a watertight case of a network protector. The heat sink is advantageously configured to conduct current between the switching apparatus and the fuse. During operation, the skin effect causes the electricity conducted by the heat sink to flow primarily through the outer regions of the heat sink, thereby resulting in the generation of heat at the outer regions of the heat sink due to electrical resistance. The heat sink includes a core from which a plurality of fins extend. The fins conduct and convect heat away from the outer regions of the heat sink, which reduces the temperature thereof and correspondingly increases the conductivity of the outer regions of the heat sink.

Abstract: A network protector system is provided in which the internal bussing of the network protector enclosure is constructed to adapt a four-pole circuit breaker for a three-pole network protection operation. This is provided by joining the central two bus conductors of the four line transformer input busses to make a single stab connection which interconnects with two central poles of the four-pole circuit breaker. The load output of the four-pole circuit breaker is interconnected with are overlapping stab which in turn is connected to a signal output bus bar so that the network protector system essentially converts a four-pole circuit breaker and line transformer system to a three-pole output system.

Abstract: Upper and lower compartments are provided in metal-clad switchgear that are mirror images of each other. The compartments have doors that move toward one another to lock. The upper compartment has rails at the bottom for receiving a fuse truck, and the lower compartment has a division sheet between the compartment that has openings in it for receiving mating projections on the doors.