Online Partial Discharge Tester (Full Name: Partial Discharge Online Monitoring Device)
It serves as the "all-weather intelligent stethoscope" for power systems.
If the power-frequency withstand voltage device discussed earlier performs "stress testing" on equipment, then the Online PD Tester equips high-voltage electrical equipment (such as switchgear, transformers, cables, etc.) with a 24/7 "cardiac monitoring system." Its core mission is to capture, in real time, the faint discharge signals generated by insulation degradation inside equipment under fully energized, normal operating conditions, detect latent faults in advance, and achieve the leap from "reactive repair" to "proactive defense."
⚙️ Core Applications and Importance
In long-term operation of high-voltage electrical equipment, the insulation layer may develop partial discharge (PD) due to aging, moisture, impurities, and other factors. If not addressed promptly, these micro-discharges can gradually evolve into insulation breakdown, leading to serious power outages or even explosion accidents.
Core Function: The Online PD Tester can accurately identify partial discharge signals inside equipment in high-noise industrial environments, determining the type, severity, and development trend of insulation defects.
Wide Application: Extensively used in the health management of critical power assets including substation switchgear, GIS (Gas-Insulated Switchgear), power transformers, high-voltage cables, generators, and overhead lines.
