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 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.