Abstract: A method of directly measuring moisture content in an oil-filled transformer includes using an optical fiber that having a grating sensor, such as a Fiber Bragg grating, defined in the optical fiber. The various conductors (windings) in the transformer are insulated using an insulator such as paper and insulating oil is filled inside the transformer. Moisture in the transformer is absorbed by the paper that surrounds the windings. A moisture content at a specific location can be measured by placing the optical fiber with the grating sensor directly at the specific location to be measured. A physical parameter of the paper that absorbed moisture changes over time, causing a change in the grating sensor of the optical fiber which changes the spectral response of optical signals that are reflected by the grating sensor. The method provides an accurate method of measuring the moisture inside the transformer at the specific location.

Abstract: A risk management system includes a plurality of sensors coupled to a processor and to an electrical device, which may be a utility asset, to monitor operational characteristics of the electrical device. The processor may send sensor data and/or processed information to a memory for storage. The processed information, the sensor data, or both are visually and graphically presented in a radar chart, a table, and a sliding scale interface for both selecting data and interpreting data provided by the processor. The combination of the radar chart, the table, and the sliding scale interface allows a user of any level of training or education to quickly and efficiently interpret the sensor data, the processed information, or both with respect to the electrical device. The radar chart depicts a failure profile that provides a visual summary of determined risk scores corresponding to subcomponents of the electrical device that may need investigation, maintenance, or replacement.

Abstract: A risk management system includes a plurality of sensors coupled to a processor and to an electrical device, which may be a utility asset, to monitor operational characteristics of the electrical device. The processor may send sensor data and/or processed information to a memory for storage. The processed information, the sensor data, or both are visually and graphically presented in a radar chart, a table, and a sliding scale interface for both selecting data and interpreting data provided by the processor. The combination of the radar chart, the table, and the sliding scale interface allows a user of any level of training or education to quickly and efficiently interpret the sensor data, the processed information, or both with respect to the electrical device. The radar chart depicts a failure profile that provides a visual summary of determined risk scores corresponding to subcomponents of the electrical device that may need investigation, maintenance, or replacement.