Abstract: A method for repairing solder joint leakages on a connection unit designed to feed cooling water into hollow metallic stator bars of a stator winding of an electrical machine, wherein the connecting device includes a metallic bar-receiving body with a passage opening in which the stator bars are inserted, aligned using metallic spacers and connected fluid-tightly to the bar-receiving body and to the spacers by substance bonding using a solder. The free ends of the stator bars terminate substantially flush with the free ends of the spacers and with an end face of the bar-receiving body. A cup-like metallic cover element surrounds and connects the free ends of the stator bars fluid-tightly to the bar-receiving body by substance bonding so as to form a cooling water chamber. A metallic cooling water line connection is provided on the cover element and connected fluid-tightly to the cooling water chamber.

Abstract: A method and system for monitoring the operating conditions of an electric generator. The system includes a triad sensor array formed within a predetermined section of a fiber optic conductor. The triad sensor array is formed of a group of sensors including a first sensor including a Bragg grating for producing a first signal representative of strain in a stator bar of the generator, a second sensor including a Bragg grating for producing a second signal representative of temperature in the stator bar, and a third sensor including a Bragg grating for producing a third signal representative of vibration amplitude in the stator bar.

Abstract: A method and system for monitoring the operating conditions of an electric generator. The system includes a triad sensor array formed within a predetermined section of a fiber optic conductor. The triad sensor array is formed of a group of sensors including a first sensor including a Bragg grating for producing a first signal representative of strain in a stator bar of the generator, a second sensor including a Bragg grating for producing a second signal representative of temperature in the stator bar, and a third sensor including a Bragg grating for producing a third signal representative of vibration amplitude in the stator bar.