Partial Discharge Tester receives 300MHz-1.5GHz electromagnetic waves with high anti-interference and sensitivity
Partial Discharge Tester (referred to as "PD Tester") is the "stethoscope" for insulation diagnosis of power equipment, used to capture tiny discharge phenomena inside high-voltage equipment (such as transformers, cables, GIS, switchgear).
Based on your location in Yangzhou City and the latest market technology trends in 2026, I have compiled the following core information to help you quickly understand and select the right model.
⚡ Core Detection Principles and Technologies
Modern PD testers typically integrate multiple sensor technologies to adapt to different detection scenarios:
Table
Detection Method Abbreviation Principle and Features Applicable Scenarios
Ultra-High Frequency Method UHF Receives 300MHz-1.5GHz electromagnetic waves, with extremely strong anti-interference and high sensitivity. Detection of internal defects in GIS and large transformers.
High-Frequency Current Method HFCT Clamps onto the grounding wire, non-invasive, and easy to install. Detection of high-voltage cables and transformer grounding wires.
Transient Earth Voltage Method TEV Detects electromagnetic wave signals on the surface of metal enclosures without power outage. Inspection of internal discharges in medium and high-voltage switchgear.
Acoustic Emission Method AE Captures sound waves generated by discharges and uses time difference for precise location. Fault location in transformers, GIS, and switchgear.
