Abstract: A gas mixture including at least a fluorinated nitrile, carbon dioxide and oxygen for use in electrical equipment is provided. The percentage of oxygen may be at least twice the percentage of the fluorinated nitrile. An additive gas may be present in the gas mixture. A switchgear unit having a gas-insulated compartment including a gas mixture including at least a fluorinated nitrile, carbon dioxide and oxygen is also provided. The percentage of oxygen may be at least twice the percentage of the fluorinated nitrile. An additive gas may be present in the gas mixture housed in the gas-insulated compartment.

Abstract: The disclosed concept pertains generally to electrical switching apparatus, such as circuit breakers, and more particularly, to enclosures for electrical switching apparatus and the components of the enclosures, such as latching doors and latching mechanisms.

Abstract: Housings for gas in a gas insulated switchgear (GIS) system is provided. The housing includes a pressure relief mechanism incorporated into the housing. The pressure relief mechanism includes a portion of the housing having a first thickness, different from a second thickness of a remaining portion of the housing, the first thickness being less than the second thickness. The pressure relief mechanism is configured to rupture at predetermined overpressure conditions to vent bi-products of an arc fault in the GIS system.

Abstract: Housings for gas in a gas insulated switchgear (GIS) system is provided. The housing includes a pressure relief mechanism incorporated into the housing. The pressure relief mechanism includes a portion of the housing having a first thickness, different from a second thickness of a remaining portion of the housing, the first thickness being less than the second thickness. The pressure relief mechanism is configured to rupture at predetermined overpressure conditions to vent bi-products of an arc fault in the GIS system.

Abstract: Housings for gas in a gas insulated switchgear (GIS) system is provided. The housing includes a pressure relief mechanism incorporated into the housing. The pressure relief mechanism includes a portion of the housing having a first thickness, different from a second thickness of a remaining portion of the housing, the first thickness being less than the second thickness. The pressure relief mechanism is configured to rupture at predetermined overpressure conditions to vent bi-products of an arc fault in the GIS system.

Abstract: Housings for gas in a gas insulated switchgear (GIS) system is provided. The housing includes a pressure relief mechanism incorporated into the housing. The pressure relief mechanism includes a portion of the housing having a first thickness, different from a second thickness of a remaining portion of the housing, the first thickness being less than the second thickness. The pressure relief mechanism is configured to rupture at predetermined overpressure conditions to vent bi-products of an arc fault in the GIS system.

Abstract: An electrical switching apparatus assembly is for a switchgear system. The switchgear system includes a number of circuit stabs and an enclosure having a number of compartments. The electrical switching apparatus assembly includes an electrical switching apparatus having a number of terminals and a mounting assembly, the terminals being structured to be mechanically coupled and electrically connected to the circuit stabs, the mounting assembly comprising a mounting member coupled to the terminals; and a maintaining assembly comprising a plate member and a maintaining member, the plate member being coupled to the mounting member, the maintaining member being coupled to the plate member and structured to engage the enclosure. Responsive to an arc fault event, the maintaining assembly is structured to move between FIRST and SECOND positions. When the maintaining assembly moves from the FIRST position to the SECOND position, the plate member moves away from the terminals.

Abstract: An electrical switching apparatus assembly is for a switchgear system. The switchgear system includes a number of circuit stabs and an enclosure having a number of compartments. The electrical switching apparatus assembly includes an electrical switching apparatus having a number of terminals and a mounting assembly, the terminals being structured to be mechanically coupled and electrically connected to the circuit stabs, the mounting assembly comprising a mounting member coupled to the terminals; and a maintaining assembly comprising a plate member and a maintaining member, the plate member being coupled to the mounting member, the maintaining member being coupled to the plate member and structured to engage the enclosure. Responsive to an arc fault event, the maintaining assembly is structured to move between FIRST and SECOND positions. When the maintaining assembly moves from the FIRST position to the SECOND position, the plate member moves away from the terminals.

Abstract: A contact assembly for an electrical component includes: a bus member; and a switching assembly structured to move between first and second positions. The switching assembly includes: a stationary contact extending from the bus member, a movable contact engaging the stationary contact when the switching assembly is in the first position and disengaging the stationary contact when the switching assembly moves toward the second position, and a switching device coupled to the bus member. When the switching assembly is in the first position, the switching device and the stationary contact are electrically connected in parallel with the bus member and the movable contact. When the switching assembly moves from the first position toward the second position, the switching device disconnects power after the movable contact disengages the stationary contact in order that electrical disconnection between the bus member and the movable contact occurs within the switching device.

Abstract: A contact assembly for an electrical component includes: a bus member; and a switching assembly structured to move between first and second positions. The switching assembly includes: a stationary contact extending from the bus member, a movable contact engaging the stationary contact when the switching assembly is in the first position and disengaging the stationary contact when the switching assembly moves toward the second position, and a switching device coupled to the bus member. When the switching assembly is in the first position, the switching device and the stationary contact are electrically connected in parallel with the bus member and the movable contact. When the switching assembly moves from the first position toward the second position, the switching device disconnects power after the movable contact disengages the stationary contact in order that electrical disconnection between the bus member and the movable contact occurs within the switching device.

Abstract: An improved conduit apparatus in accordance with the disclosed and claimed concept includes one or more conduits that each enclose therein an electrical conductor that carries a phase of a multi-phase electrical supply. The conduits are connected to the walls of the electrical enclosures with an attachment apparatus that extends between the conduits and the walls of the electrical enclosures. A clamp apparatus retains the electrical conductors in a state of tension within an interior region of the conduits in a position spaced from the walls of the conduits.

Abstract: An arc management system for an electrical enclosure assembly is provided. The electrical enclosure assembly includes a housing assembly and a conductive bus assembly. The arc management system includes a number of conductive bus extension assemblies, a number of first and second arc horn assemblies, and a number of ground conductor assemblies. Each conductive bus extension assembly includes a conductive member coupled to the conductive bus assembly. Each first arc horn assembly includes a conductive arc horn member. Each first arc horn member is in electrical communication with an associated bus extension conductive member. Each second arc horn assembly includes a conductive arc horn member. Each ground conductor assembly includes a ground conductive member. Each second arc horn member in electrical communication with an associated ground conductor assembly ground conductive member. Each first arc horn member is associated with a second arc horn member and disposed an effective distance therefrom.

Abstract: A restraint assembly is for a switchgear system. The switchgear system includes an enclosure having a number of compartments and a number of electrical apparatus, such as for example, circuit breakers, movable into and out of the compartments. The restraint assembly includes at least one latch assembly comprising a mounting member, a latch pivotably coupled to the mounting member, and a number of biasing elements biasing the latch. The latch moves between a latched position corresponding to the latch locking an electrical apparatus within a corresponding compartment, and an unlatched position corresponding to the electrical apparatus being movable with respect to the compartment. The biasing elements bias the latch toward the latched position.

Abstract: An inter-pole drive bar in accordance with the disclosed and claimed concept is usable to extend among a plurality of poles of an improved switch apparatus and to cause the plurality of poles to be together moved between a CLOSED position and an OPEN position. The inter-pole drive bar is elongated and has a plurality of connection points that are connectable with the poles and further includes a number of features that avoid engagement or other interference between the inter-pole drive bar and the various structures of the switch apparatus. The inter-pole drive bar includes an elongated linkage element whose movement between the CLOSED and OPEN positions of the switch apparatus are primarily translation of the linkage element in a direction generally parallel with its longitudinal extent and translation of the linkage element in a direction generally perpendicular to its longitudinal extent.

Abstract: The disclosed concept pertains generally to electrical switching apparatus, such as circuit breakers, and more particularly, to enclosures for electrical switching apparatus and the components of the enclosures, such as latching doors and latching mechanisms.

Abstract: An improved conduit apparatus in accordance with the disclosed and claimed concept includes one or more conduits that each enclose therein an electrical conductor that carries a phase of a multi-phase electrical supply. The conduits are connected to the walls of the electrical enclosures with an attachment apparatus that extends between the conduits and the walls of the electrical enclosures. A clamp apparatus retains the electrical conductors in a state of tension within an interior region of the conduits in a position spaced from the walls of the conduits.

Abstract: A restraint assembly is for a switchgear system. The switchgear system includes an enclosure having a number of compartments and a number of electrical apparatus, such as for example, circuit breakers, movable into and out of the compartments. The restraint assembly includes at least one latch assembly comprising a mounting member, a latch pivotably coupled to the mounting member, and a number of biasing elements biasing the latch. The latch moves between a latched position corresponding to the latch locking an electrical apparatus within a corresponding compartment, and an unlatched position corresponding to the electrical apparatus being movable with respect to the compartment. The biasing elements bias the latch toward the latched position.

Abstract: An electrical switching apparatus assembly is for a switchgear system. The switchgear system include an enclosure and a plurality of electrical bus members. The enclosure includes a number of compartments and a gas barrier having a plurality of thru holes. The electrical switching apparatus assembly includes an electrical switching apparatus, movable between a connection position and a disconnected position, and a pin assembly. The housing of the electrical switching apparatus includes a cover member having a plurality of apertures. The pin assembly includes a plurality of pins. When the electrical switching apparatus is disposed in the connected position, the apertures of the cover member align with the thru holes of the gas barrier to receive the pins and secure the electrical switching apparatus to the enclosure.

Abstract: An electrical switching apparatus assembly is for a switchgear system. The switchgear system include an enclosure and a plurality of electrical bus members. The enclosure includes a number of compartments and a gas barrier having a plurality of thru holes. The electrical switching apparatus assembly includes an electrical switching apparatus, movable between a connection position and a disconnected position, and a pin assembly. The housing of the electrical switching apparatus includes a cover member having a plurality of apertures. The pin assembly includes a plurality of pins. When the electrical switching apparatus is disposed in the connected position, the apertures of the cover member align with the thru holes of the gas barrier to receive the pins and secure the electrical switching apparatus to the enclosure.

Abstract: An improved conduit apparatus in accordance with the disclosed and claimed concept includes one or more conduits that each enclose therein an electrical conductor that carries a phase of a multi-phase electrical supply. The conduits are connected to the walls of the electrical enclosures with an attachment apparatus that extends between the conduits and the walls of the electrical enclosures. A clamp apparatus retains the electrical conductors in a state of tension within an interior region of the conduits in a position spaced from the walls of the conduits.