Abstract: A device is provided for operating a circuit breaker handle. The device includes a body having a receiving area to receive and engage a portion of the circuit breaker handle. The body is fixedly secured to a shaft for movement between a first position and a second position. The body is caused to move by a forces from a first coil and a second coil. The first coil generates a first force in a first direction, and the second coil generates a second force in a second direction, wherein the second direction is opposite to the first direction. The first and second forces are transferred to the shaft for effectuating movement between the first and second positions.

Abstract: An electronic circuit interruption device having a plurality of protection, indication and control options includes a dedicated printed circuit board having electrical connection with operating circuits controlling each of the several options. Electrical connections between the operating circuits and the circuit interruption controller is made through corresponding dedicated resistors. Option selection is obtained by removal of resistors connecting with non-selected circuits on the printed circuit board.

Abstract: An arrangement for connection between motor controller electronic components and silicon controlled rectifiers (SCR) contained within the controller circuit is presented with line and load straps being arranged on the bottom surface of the motor controller compartment at opposite ends thereof. The SCR's are positioned under the compartment on an elongated heat-sink support plate. Intermediate block connectors interconnect the SCR's with the controller line and load straps.

Abstract: A latching system for a circuit breaker is arranged to actuate a trip unit and interrupt circuit current upon occurrence of a short circuit or an overcurrent condition. The latching system employs an armature having a recess formed therein and a cradle having a cradle tip arranged to releasably engage the recess. A thermal magnetic trip unit is depicted within the circuit breaker for the purposes of detecting overcurrent conditions through the electric path. During current transport through the circuit breaker, the current is thermally sensed by means of the bimetal and magnetically sensed by means of the magnet. The armature rotates against the return bias of a compression spring to release the cradle tip from the recess and allow counterclockwise rotation of the contact arm. The rotation of the contact arm causes the separation of the movable and fixed contacts under the urgence of a mechanism spring.

Abstract: A thermal trip unit within a multi-pole circuit breaker includes a bimetal element having an off-set end to provide cam function during the calibration of the bimetal element. A calibration screw is threadingly engaged within the bimetal element and is adjusted at various calibration levels by means of a step motor driver element.

Abstract: A method for assembling a modular current transformer (17) includes providing a first bobbin (40A) having a first aperture (32A) disposed therein and a second bobbin (40B) having a second aperture (32B) disposed therein. The first axial aperture (32A) is aligned with the second axial aperture (32B), and a xontinuous wire (21) is wrapped sround the first bobbin (40A) in a first direction. With the first and second axial apertures (32A, 32B) still aligned, the continuous wire (21) is then wrapped around the second bobbin (40B) in a second direction opposite the first direction. The first bobbin (40A) is then inverted by pivoting the first bobbin (40A) about a flexible tab (33) that connects the first and second bobbins (40A, 40B). A transformer core (22) is then disposed through the first and second axial apertures (32A, 32B). The windings on the first and second bobbins (32A, 32B) form the secondary windings (20A, 20B) for the current transformer (17).

Abstract: A cooling assembly for semiconductor devices in the form of an enclosure including an inlet and outlet with a semiconductor support assembly is presented. The air passage connection with the inlet defines vortex configuration for the rapid transport of compressed air to the semiconductor devices arranged between the enclosure inlet and outlet.

Abstract: The load lugs electrically connecting circuit breakers employing electronic trip units with associated electrical distribution circuits are shaped to provide magnetic flux concentration to Hall effect current sensors within the electronic trip unit circuit. The Hall effect sensor is positioned within the shaped region of the load lug for optimum focus of the magnetic flux within each phase of a multi-phase electrical distribution system.

Abstract: A visible trip indication arrangement for a circuit breaker. The visible trip indication arrangement comprises a viewing window forming a part of the breaker housing, the viewing window including indicia thereon that is readily or enhancedly visible when the circuit breaker has been tripped and essentially not visible when the circuit breaker is operating by way of a trip indicator that moves under and aligns with the viewing window when the circuit breaker is in the tripped condition. The trip indicator having a brightly colored surface, causes the indicia on the viewing window to be readily visible by way of the reflected light off a surface thereof.

Abstract: A circuit interrupter of the type including an electronic trip unit for overcurrent determination which includes a small-sized iron core current transformer to power the trip unit electronics along with a giant magnetic resistor semiconductor (GMR) to sense the current flow within the protected circuit.

Abstract: A system for monitoring and controlling a welding/brazing operation on a workpiece having two spaced apart materials with a brazing material disposed therebetween. The system includes a welding apparatus having two spaced apart electrodes. A current is applied through the electrodes and the workpiece sufficient to melt the brazing material. A controller controls the brazing operation by controlling the duration of time during which current flows through the workpiece. A non-contact sensor is coupled to the controller and measures the temperature of the brazing material, so that upon a predetermined temperature measured by the sensor, the controller causes the termination of the current to the workpiece.

Abstract: A ground fault protection module is attached to a circuit breaker employing a thermal-magnetic trip unit to separate the circuit breaker contacts upon occurrence of a ground fault. The ground fault module contains a logic circuit and a giant magnetic resistor for detecting the ground fault.

Abstract: A compact current transformer is formed by arranging a pair of secondary windings on opposite sides of a single turn primary winding. A core is then wound about the primary winding and part of the secondary winding coils from a continuous roll of metal strap. The secondary windings are arranged on a pair of bobbins on opposite sides of the transformer core. A modular twin bobbin arrangement allows the secondary windings to be wound from a continuous source of transformer wire. The continuous wound core eliminates air gaps and improves magnetic transfer between the primary winding and the secondary winding. The continuous transformer wire eliminates the need for soldering or welding to connect between the two secondary windings.

Abstract: A modular thermal magnetic trip unit includes the bimetal, magnet, armature and latch in a one-piece assembly. A latch opening is formed in a bottom part of the magnet on a side opposite the bimetal for receiving and retaining the tip of the cradle. The motion of the inodular assembly is accelerated by the combined thermal and magnetic forces acting in unison.

Abstract: A laser is used within assembled component parts to create autogenous welds to produce a receptacle. This method requires no post-weld treatment. This laser welding is suitable to construct electrical distribution panel boxes.

Abstract: Laser joining of dissimilar material in order to form an integral structure. Such structure of this type, generally, allow circuit breaker components which are constructed of different material, to be joined together to form an integral circuit breaker.

Abstract: This invention relates to laser joining of dissimilar materials in order to form an integral structure. Structures of this type, generally, allow circuit breaker components, which are constructed of different materials, to be joined together in order to form an integral circuit breaker.