See incipient insulation defects—inside the tank—before they become failures. Power View UHF PD Transformer Monitoring picks up signals in the 100 MHz–3 GHz band with immersed probes that fit DN50/DN80 valves or dielectric windows, capturing the transformer’s own RF emissions from PD under real load. Because the steel tank forms a shielded cavity, UHF is relatively immune to yard interference, delivering earlier, cleaner detection and more accurate source indication than conventional electrical-only methods. Field-ready hardware (up to 5 bar, 120 °C, IP65, 50–450 mm laser-scaled insertion depth) makes retrofit practical across fleets without special outages. Paired with advanced analytics, the system trends PD activity and turns it into clear alarms, risk scoring, and maintenance recommendations in the Substation Digital platform—so teams act on insight, not noise. Use UHF alone or alongside electrical PD to get complementary coverage and the earliest possible warning on winding, oilpaper, or interface defects.