Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gases. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gases across adjacent sets of terminals.

Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalls. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

Abstract: An apparatus includes a magnetizing circuit configured to be coupled to a transformer and to selectively provide a magnetizing current to the transformer and a control circuit configured to cause the magnetizing circuit to provide the magnetizing current following disconnection of the primary winding of the transformer from the power source. The magnetizing circuit may be configured to provide the magnetizing current from a first source following disconnection of the primary winding from a second source. The transformer may include a first transformer and the apparatus may further include a second, higher impedance transformer coupled between the second source and the first transformer. In further embodiments, the magnetizing circuit may include a solid-state converter.

Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.

Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalls. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gases. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gases across adjacent sets of terminals.

Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gasses. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall, is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gasses across adjacent sets of terminals.

Abstract: A power pole inverter (10) is provided. The power pole inverter (10) includes a housing assembly (12), a capacitor assembly (14), a number of arm assemblies (16), a number of heat sinks (32), and a support assembly (20). The housing assembly (12) includes a number of sidewalls (17). The housing assembly sidewalls (17) defining an enclosed space (21). The capacitor assembly (14) is coupled to the housing assembly (12). Each arm assembly (16) includes a plurality of electrical components (50) and a number of electrical buses (70). Each the electrical bus (70) includes a body (72) with terminals (88), each the terminal (88) structured to be coupled to, and in electrical communication with, the capacitor assembly (14), each arm assembly (16) including a neutral terminal (88). Each arm assembly (16) is coupled to, and in electrical communication with, the capacitor assembly (14). The support assembly (20) includes a non-conductive frame assembly (110).

Abstract: In one embodiment, a variable frequency drive system includes a main contactor, a variable frequency drive, a charging module structured to generate a magnetizing AC voltage, wherein the charging module is structured to selectively provide the magnetizing AC voltage to a transformer of the variable frequency drive, and a sensing and control circuit having a number of sensors operably associated with the variable frequency drive. The sensing and control circuit is structured to detect a short circuit condition in the variable frequency drive when the magnetizing AC voltage is provided to the transformer based on an output of at least one of the number of sensors, and responsive thereto prevent the main contactor from being closed and thereby prevent the main AC voltage from being provided to the transformer.

Abstract: An apparatus includes a magnetizing circuit configured to be coupled to a transformer and to selectively provide a magnetizing current to the transformer and a control circuit configured to cause the magnetizing circuit to provide the magnetizing current following disconnection of the primary winding of the transformer from the power source. The magnetizing circuit may be configured to provide the magnetizing current from a first source following disconnection of the primary winding from a second source. The transformer may include a first transformer and the apparatus may further include a second, higher impedance transformer coupled between the second source and the first transformer. In further embodiments, the magnetizing circuit may include a solid-state converter.

Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.

Abstract: In one embodiment, a variable frequency drive system includes a main contactor, a variable frequency drive, a charging module structured to generate a magnetizing AC voltage, wherein the charging module is structured to selectively provide the magnetizing AC voltage to a transformer of the variable frequency drive, and a sensing and control circuit having a number of sensors operably associated with the variable frequency drive. The sensing and control circuit is structured to detect a short circuit condition in the variable frequency drive when the magnetizing AC voltage is provided to the transformer based on an output of at least one of the number of sensors, and responsive thereto prevent the main contactor from being closed and thereby prevent the main AC voltage from being provided to the transformer.

Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gasses. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall, is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gasses across adjacent sets of terminals.

Abstract: An electrical system includes a transformer structured to be selectively coupled to an AC source that provides a main AC voltage, the transformer having a number of sets of primary windings and a number of sets of secondary windings, and a charging module structured to generate a magnetizing AC voltage. The charging module is structured to selectively provide the magnetizing AC voltage to: (i) one of the number of sets primary windings, or (ii) one of the number of sets secondary windings. The magnetizing AC voltage is such that responsive to the magnetizing AC voltage being provided to one of the number of sets of primary windings or one of the number of sets of secondary windings, one or more of the number of sets of primary windings will be magnetized in a manner wherein a flux of the one or more of the number of primary windings is in phase with the main AC voltage provided from the AC source.

Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalk. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalk. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

Abstract: An improved cable assembly includes at least a first elongated signal-carrying cable and a protector that has an elongated covering apparatus that is connected with the signal-carrying cable. The covering apparatus has a resilient portion having a number of corrugations. The signal-carrying cable is received within the covering apparatus, and the resilient portion is moved from a free state to a collapsed state. The signal-carrying cable and the covering apparatus are received at least partially in an uncured quantity of potting compound, and the compound is then permitted to cure.

Abstract: An improved cable assembly includes at least a first elongated signal-carrying cable and a protector that comprises an elongated covering apparatus that is connected with the signal-carrying cable. The covering apparatus comprises a resilient portion having a number of corrugations. The signal-carrying cable is received within the covering apparatus, and the resilient portion is moved from a free state to a collapsed state. The signal-carrying cable and the covering apparatus are received at least partially in an uncured quantity of potting compound, and the compound is then permitted to cure.

Abstract: A housing assembly, structured to enclose a plurality of electrical components and flexible cables, each the electrical component coupled at least one other electrical component or to an input device by the cables, includes a plurality of mounting plate members and a plurality of vertical walls. The plurality of mounting plate members includes at least a bottom mounting plate member and at least one movable mounting plate member. Each mounting plate structured to support one or more electrical components. The plurality of vertical walls include a front wall coupled to, and extending generally perpendicular to, the base plate member, a first side wall coupled to, and extending generally perpendicular to, the base plate member, a second side wall coupled to, and extending generally perpendicular to, the base plate member, a back wall coupled to, and extending generally perpendicular to, the base plate member.

Abstract: A pair of circuit boards, or electrically insulative panel members on which the circuit boards are mounted, have side edges which slide into aligned longitudinally extending slots in a pair of facing, spaced apart cantilevered free sections of a pair of planar legs of a bracket secured to a panel in an electric power equipment enclosure. A terminal portion of one free section diverges outward to form a camming surface against which a complimentary camming surface on a rearward edge of a tab on the associated side edge of the panel member bears to spread the free section apart until the tab passes into the slot and the terminal portion snaps over the tab and engages a latching surface on the forward edge of the tab to latch the panel member to the bracket. The panel member is released by lifting the diverging terminal portion of the one free section to clear the latching surface and sliding the panel member out of the slots.