In the vast network of power systems, every piece of high-voltage equipment—whether a transformer, switchgear, or cable—resembles a living organism with its own “pulse.” Yet, hidden within this organism, an invisible and dangerous “lesion” may quietly develop: Partial Discharge (PD).
Partial discharge refers to localized, incomplete electrical discharges that occur within the insulation medium. Think of it as tiny “sparks” inside insulation materials. While a single PD event may not cause immediate failure, the accumulated effect over time continuously erodes the insulation, eventually leading to catastrophic breakdown.
Why Is Partial Discharge Dangerous in Power Equipment?
Both academic research and industry experience confirm that PD is one of the most critical indicators of insulation health in high-voltage equipment, and a major cause of equipment failure. Its risks are characterized by:
Hidden Nature of Partial Discharge
PD often occurs at microscopic defects inside equipment, such as voids, impurities, or aged insulation—undetectable to the naked eye.
Cumulative Insulation Damage
Each discharge creates tiny damage to the insulation. Over time, this accumulates—like the “boiling frog” effect—until insulation performance deteriorates sharply.
Sudden Failure and Safety Risks
Once PD progresses to a critical stage, insulation collapse can occur instantly, causing short circuits, fires, severe financial losses, or even safety incidents.
Early Detection of PD: A Key to Grid Safety
This is why early detection and diagnosis of partial discharge has become indispensable in power system operation and maintenance.
Our Solution: Multifunctional Handheld Partial Discharge Detector
To combat this invisible threat, Zhuhai Huawang Partial Discharge Detector was developed. It is not merely a measurement tool, but a smart assistant for protecting your valuable power assets.
Advanced PD Detection Methods
Equipped with advanced detection technologies and intelligent diagnostic algorithms, our PD detector can accurately capture weak discharge signals through multiple methods:
UHF Partial Discharge Detection
Detect electromagnetic waves generated by PD in GIS and oil-filled equipment, using internal or external sensors.
Ultrasonic PD Detection
Capture sound waves produced by PD, suitable for open equipment or external inspections.
TEV (Transient Earth Voltage) Detection
Non-invasively assess insulation conditions by monitoring transient voltages on metallic surfaces.
Key Features of Our PD Detector
- Live detection without power outages – perform full “health checks” on equipment while in operation, greatly improving maintenance efficiency.
- Accurate PD location – quickly pinpoint the discharge source, providing clear guidance for repair actions.
- Smart insulation diagnosis – analyze discharge patterns (such as PRPD maps) to identify defect types and predict potential fault development.
Why Choose Our Handheld Partial Discharge Detector?
By choosing our detector, you are not just purchasing a device—you are adopting a complete insulation health management solution.
We help you shift from reactive repair to proactive prevention, effectively reducing failure rates, extending equipment lifespan, and ensuring the stability and safety of the power grid.