Abstract: A portable electric powered or pneumatic powered paint system designed to worn in a typical workman's tool belt and thus accompany the painter as he moves from wall to wall and room to room without the restriction of electrical cords plugged into wall outlets or air hoses connected to an air compressor. The electrically powered embodiment of the invention consists of a paint reservoir, an electric paint pump, a power pack of two or more 18 Volt batteries, a paint applicator and associated paint supply tubing for transfer of paint from the reservoir to the paint applicator. The pneumatic embodiment of the invention replaces the electric paint pump and battery power pack with a pressurized air bottle and pressure regulator. Both embodiments of the invention provide the painter with a self-contained powered painting system.

Abstract: A portable electric (battery) powered paint system designed to worn in a typical workman's tool belt and thus accompany the painter as he moves from wall to wall and room to room without the restriction of electrical cords plugged into wall outlets. The invention consists of a paint reservoir, an electric paint pump, a power pack of two or more 18 Volt batteries, a paint applicator and associated paint supply tubing for transfer of paint from the reservoir to the paint applicator. The invention provides the painter with a self-contained powered painting system.

Abstract: A portable electric (battery) powered paint system designed to worn in a typical workman's tool belt and thus accompany the painter as he moves from wall to wall and room to room without the restriction of electrical cords plugged into wall outlets. The invention consists of a paint reservoir, an electric paint pump, a power pack of two or more 18 Volt batteries, a paint applicator and associated paint supply tubing for transfer of paint from the reservoir to the paint applicator. The invention provides the painter with a self-contained powered painting system.

Abstract: A portable electric powered or pneumatic powered paint system designed to worn in a typical workman's tool belt and thus accompany the painter as he moves from wall to wall and room to room without the restriction of electrical cords plugged into wall outlets or air hoses connected to an air compressor. The electrically powered embodiment of the invention consists of a paint reservoir, an electric paint pump, a power pack of two or more 18 Volt batteries, a paint applicator and associated paint supply tubing for transfer of paint from the reservoir to the paint applicator. The pneumatic embodiment of the invention replaces the electric paint pump and battery power pack with a pressurized air bottle and pressure regulator. Both embodiments of the invention provide the painter with a self-contained powered painting system.

Abstract: The closing protection mechanism provided herein includes a control unit, a sensing switch and a sensing switch actuator. The control unit is coupled to, and in electronic communication with, the trip device. The control unit is structured to receive a sensing switch signal and to provide a control signal to the trip device. The sensing switch coupled to, and in electronic communication with, the control unit. The sensing switch is disposed adjacent to the toggle assembly. The sensing switch is structured to provide a sensing switch signal to the control unit. The sensing switch actuator is disposed on the toggle assembly. The sensing switch actuator is structured to actuate the sensing switch. The sensing switch is structured to be actuated by the sensing switch actuator when the toggle assembly is in the second, over-toggle configuration.

Abstract: A current transformer comprises a coil, a core and a shunt member. The core forms a magnetic circuit and has a first permeability. At least a portion of the core is encircled by the coil. The shunt member is coupled to the core and has a second permeability. The shunt member is continuous and forms a magnetically parallel path with the at least a portion of the core encircled by the coil. The current transformer may be incorporated in to a trip device.

Abstract: The closing protection mechanism provided herein includes a control unit, a sensing switch and a sensing switch actuator. The control unit is coupled to, and in electronic communication with, the trip device. The control unit is structured to receive a sensing switch signal and to provide a control signal to the trip device. The sensing switch coupled to, and in electronic communication with, the control unit. The sensing switch is disposed adjacent to the toggle assembly. The sensing switch is structured to provide a sensing switch signal to the control unit. The sensing switch actuator is disposed on the toggle assembly. The sensing switch actuator is structured to actuate the sensing switch. The sensing switch is structured to be actuated by the sensing switch actuator when the toggle assembly is in the second, over-toggle configuration.

Abstract: A sensor apparatus is for a power bus including a plurality of characteristics. The sensor apparatus includes a housing; one or more sensors each adapted to sense a characteristic of the power bus; and a circuit adapted to transmit or receive a wireless signal. A processor includes a low-power mode and a routine adapted to wake up from the low-power mode, to input the sensed characteristic from the one or more sensors, to output a corresponding signal to the circuit to transmit as the wireless signal, and to sleep in the low-power mode. A power supply is adapted to power the sensors, the circuit and the processor from flux arising from current flowing in the power bus. The power supply includes one or more voltages.

Abstract: Maintenance trip functions override the normal or specified trip functions of a low voltage circuit breaker to reduce pickup currents and/or time delays to effect faster trips, which reduces arc energy produced by faults during maintenance or testing on a live circuit breaker.

Abstract: A microprocessor based overcurrent trip unit which generates trip signals as an adjustable function of current and time, has a visual representation of the trip function on a front panel with 2-color LEDs associated with the trip function serving as indicators of trip conditions when red, and of a selected programmable parameter when green. The green LEDs flash to indicate parameter selected for modification in a program mode and illuminate steady in a view mode.

Abstract: A first trip unit for interconnection with a second trip unit includes current transformers and potential transformers for sensing current, voltage and frequency conditions of a circuit breaker's separable contacts. A microprocessor-based trip mechanism provides a trip signal, which is employed by the circuit breaker's operating mechanism to open the separable contacts as a function of the sensed electrical conditions and related predetermined operating values. The microcomputer's transceiver communicates with the second trip unit over a passive two-wire communication cable to acquire the predetermined settings of the second trip unit. The microcomputer includes a firmware routine which employs the acquired predetermined settings as its predetermined values.

Abstract: A circuit breaker includes separable contacts for movement between a closed position and an open position, and an operating mechanism for moving the separable contacts between the closed and open positions. Current transformers and potential transformers sense current, voltage and frequency conditions of the separable contacts and produce signals corresponding to those electrical conditions. A trip unit employs those signals corresponding to the electrical conditions to produce a trip signal. A trip coil employs the trip signal to actuate the operating mechanism to move the separable contacts to the open position. A closing mechanism produces a close signal, and a close actuator mechanism employs the close signal to actuate the operating mechanism to move the separable contacts to the closed position. The trip unit includes a microprocessor-based firmware routine for selectively enabling and disabling the close actuator mechanism as a function of the signals corresponding to the electrical conditions.

Abstract: A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism moves the separable contacts between the closed and open positions and has a closed state and an open or tripped state which corresponds to the open position. A trip circuit senses electrical current flowing through the separable contacts, employs the sensed current to trip the operating mechanism to the tripped state to move the separable contacts to the open position, and provides plural status signals. A display circuit cooperates with the trip circuit and includes light emitting diodes for outputting the status signals. A battery powers the display circuit which further includes an oscillator circuit for modulating the LEDs to reduce power from the battery to the display circuit.

Abstract: A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism, which moves the separable contacts between the closed and open positions, has a closed state and an open or tripped state which corresponds to the open position. A current transformer senses electrical current flowing through the separable contacts as a sensed current. A trip mechanism employs the sensed current for tripping the operating mechanism to the tripped position to move the separable contacts to the open position. The trip mechanism includes a microprocessor which generates short delay and ground fault trip functions of electrical current and time. The microprocessor inputs a first interlock signal from a downstream electrical switching device which generates the first interlock signal with a first value when current through the downstream device exceeds a predetermined value and with a second value otherwise.

Abstract: A circuit interrupting device provides for operator selection of protection parameters for a neutral conductor separate from operator selected phase protection.

Abstract: A graphical representation of the current/time trip characteristic displayed on the operator's panel of an electronic trip unit for a circuit interrupter, has different indicia, such as different colors, identifying the representation of independent trip functions from those of dependent trip functions, thereby making the operator aware that adjustment of one of the dependent trip functions will also affect an adjustment of the other dependent portions of the current/time trip characteristic.

Abstract: A circuit interrupter includes a circuit arrangement for sampling a conditioned current value and determining operating characteristics related to the current flow through an electrical circuit. Also included is a circuit arrangement for comparing the operating characteristics to preselectable tripping parameters and circuit arrangement for initiating a trip condition when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a circuit arrangement for selecting and displaying operating information in an understandable format and in an easily accessible position on the circuit interrupter is also included.

Abstract: A circuit interrupter includes a circuit arrangement for sampling a conditioned current value and determining operating characteristics related to the current flow through an electrical circuit. Also included is a circuit arrangement for comparing the operating characteristics to preselectable tripping parameters and for initiating a trip condition when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a circuit arrangement for establishing a ground fault current limit using a minimum number of components to achieve a wide range of possible settings, is also included.

Abstract: A circuit interrupter includes a circuit arrangement for sampling a conditioned current value and determining operating characteristics related to the current flow through an electrical circuit. Also included is a circuit arrangement for comparing the operating characteristics to preselectable tripping parameters and for initiating a trip condition when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a circuit arrangement for initiating a hardware override trip condition using a minimum number of components upon sensing an override signal, is also included; the override signal representing a limit selectable from a range of values.

Abstract: A circuit interrupter includes a circuit arrangement for sampling a conditioned current value and determining operating characteristics related to the current flow through an electrical circuit. Also included is a circuit arrangement for comparing the operating characteristics to preselectable tripping parameters and initiating a trip condition when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a fault indicating and selecting arrangement which utilizes a trip curve graph to assist in the operation of the circuit interrupter, is also included.