Online Partial Discharge Testing Is the Basis for Condition-Based Maintenance of Power Equipment
Stethoscope" and "early warning system." Unlike traditional offline testing, it can monitor partial discharge (PD) phenomena inside high-voltage electrical equipment in real time under normal energized operating conditions, thereby detecting insulation aging, dampness, or manufacturing defects in advance and avoiding sudden failures.
Based on the latest technological developments from 2025-2026 (such as the implementation of the new State Grid standard Q/GDW 10540.5-2025), here is a summary of the latest technical approaches, mainstream products, and core advantages in this field.
