Abstract: A method of sealing a generator stator bar and a stator bar end fitting receiving the end including the steps of: brazing the fitting to the end of the stator bar with a braze material; applying a powder coating material to the end of the stator bar in the fitting; and curing the powder coating material to form a barrier coating on the end of the stator bar and the adjoining interior surfaces of the fitting.

Abstract: A tracer gas bag for a stator bar leak test comprising a polymer sheet having four marginal edges, each covered with a strip of tape with exposed adhesive thereon.

Abstract: A method of sealing a generator stator bar and a stator bar end fitting receiving the end including the steps of: brazing the fitting to the end of the stator bar with a braze material; applying a powder coating material to the end of the stator bar in the fitting; and curing the powder coating material to form a barrier coating on the end of the stator bar and the adjoining interior surfaces of the fitting.

Abstract: An Advanced Data Logging kit for testing a generator's liquid cooled stator bar system for leaks is disclosed. The kit is installed in between the generator's header and the HIT Skid and in the generator's cooling system. The kit includes pressure and vacuum transducers, sensor arrays with thermocouples, and data acquisition circuits. The sensor arrays are used to plumb the thermocouples into the generator's header and cooling pipes. The pressure and vacuum transducers and the thermocouples are used to collect pressure, vacuum and temperature data that is used to conduct a Pressure Decay Test and a Vacuum Decay Test to determine whether or not a leak in the liquid cooled stator bar system exists. A computer included in the kit has the ability to analyze the data readings, perform calculations, and predict leak rates in the stator bar system.

Abstract: An online insulation condition monitoring system for a rotating electric machine, includes a differential current sensor and a voltage sensor coupled to the machine, for measuring values for the instantaneous differential current and the instantaneous phase voltage respectively. A processing module is configured for converting the values for the instantaneous differential current and the instantaneous phase voltage to respective values for phasor current and phasor voltage. The processing module further calculates an angular relationship between phasor current and phasor voltage and generates an output based on the calculated angular relationship, as an indication of insulation condition.

Abstract: A tracer gas bag for a stator bar leak test comprising a polymer sheet having four marginal edges, each covered with a strip of tape with exposed adhesive thereon.