Reclamation Information Sharing Environment (RISE)

This dataset contains baseline and post-fault Insulation Resistance (IR) and Polarization Index (PI) test results for generator stator windings and field windings. Testing was performed using a Megger S1-1568 insulation tester. The dataset includes: Baseline testing for Phase A, Phase B, Phase C, Bulk (3-phase), and Field Winding; After-Fault #1 (CO2 suppression) - tests not performed because suppression media did not enter the air housing; After-Fault #2 (Hybrid Water Mist media) - IR/PI test results included; After-Fault #3 (Hybrid Water Mist media) – IR/PI test results included; Measurements include corrected IR readings (to 40 degrees C), PI values, leakage current (µA), environmental conditions (temperature, humidity), and test voltages (500-5103 Vdc). The purpose of this data collection was to evaluate generator stator and field winding insulation health under baseline conditions and after exposure to various fire suppression media, providing quantitative IR and PI metrics used to assess degradation or confirm compliance with minimum acceptable thresholds. To see the report associated with this dataset, please visit https://data.usbr.gov/catalog/8534/item/133948.