Your Professional Ultrasonic Partial Discharge Tester Supplier
Founded in 1992 and formally incorporated as Wuhan Moen Intelligent Electrical Co., Ltd. on November 12, 2012, with a registered capital of RMB 36 million, we are a professional technology company specializing in the research, development, and production of high-voltage test equipment. Our 8,000 m² facility in Wuhan East Lake High-Tech Development Zone houses dedicated production lines, R&D centers, and administrative facilities. With an experienced technical and production team, Moen focuses on core products including test transformers, series resonance systems, and other high-voltage testing equipment. Backed by years of industry experience, the company is committed to reliable manufacturing, continuous technical improvement, and providing practical solutions for global power utility and industrial customers.
-
![Multifunctional Partial Discharge Detector]()
Multifunctional Partial Discharge DetectorThe MOEORW-Wi900PD multi-functional partial discharge detector features a unibody design and includes six measurement channels for partial discharge: TEV, HFCT, UHF, AA, AE, and an external focused -
![Multifunctional Partial Discharge Tester]()
Multifunctional Partial Discharge TesterMOEORW-WPD530NC is a portable multifunctional partial discharge tester integrating ultrasonic, TEV, UHF and HF detection. It is used for live inspection, partial discharge location and insulation -
![Safety Helmet Impact And Puncture Tester]()
Safety Helmet Impact And Puncture TesterThe MOEORW-W6820M2 safety helmet impact and puncture resistance tester is used to test the impact absorption and puncture resistance performance of safety helmets. It is suitable for testing -
![Handheld Ultrasonic PD Detector]()
Handheld Ultrasonic PD DetectorThe MOEORW-WPD526S multi-functional infrared acoustic Portable Ultrasonic PD Detector has a test bandwidth of 30kHz~3.0GHz and a temperature range of -20℃~400℃, accurately detecting partial discharge -
![GIS Partial Discharge Tester]()
GIS Partial Discharge TesterThis GIS partial discharge tester adopts UHF and ultrasonic dual detection technologies, with high sensitivity and strong anti-interference ability. It is dedicated to live partial discharge -
![Transformer Partial Discharge Tester]()
Transformer Partial Discharge TesterThis transformer partial discharge tester integrates UHF, AE and TEV triple detection technologies, with PRPD/PRPS spectrum analysis and intelligent power frequency synchronization. It is specially -
![Partial Discharge Tester For High Voltage Switchgear]()
Partial Discharge Tester For High Voltage SwitchgearMEJFD-W103 High-Voltage Switchgear Partial Discharge Inspection and Localization Instrument Features integrated TEV and ultrasonic dual detection modes, color display with three-stage warning -
![Cable Partial Discharge Tester]()
Cable Partial Discharge TesterMOEORW-W5086LFG Cable Distributed Partial Discharge Testing System supports live-line testing from 10 to 1000 kV. Its distributed architecture can scale up to 100 units, while multi-connection and -
![4-Channel Portable Partial Discharge Tester]()
4-Channel Portable Partial Discharge TesterMEYD-W5kVA-50kV AC DC Hipot Test Set incorporates multiple monitoring and protection functions. Featuring a multi-layered insulation design with a novel appearance, it is compact and lightweight. The
Why choose us
Our Certificate
We are certified in ISO 9001 (Quality), ISO 45001 (Health & Safety), and ISO 14001 (Environment), ensuring high standards in all aspects of our operations.
Strong R&D Capability
Committed to technological breakthroughs, including investments to develop 750kV reactor solutions.
Experienced Technical Team
A growing team of 61 employees supporting product development, production, and customer service.
Complete Pre & After-Sales Service
From solution design and technical support to installation, maintenance, and fast response service.
The Handheld Ultrasonic Partial Discharge (PD) Detector is a portable diagnostic instrument designed to detect, locate, and assess partial discharge activity in high-voltage electrical equipment. By capturing ultrasonic signals generated by insulation defects, the device enables maintenance personnel to identify potential failures at an early stage, helping improve equipment reliability, safety, and operational efficiency.
|
Earth radio wave parameters |
Contact Ultrasonic Parameters |
|||
|
Measurement range |
0～80 dBmV |
Measurement range |
- 10 dBμV to 80 dBμV |
|
|
Resolution |
0.1dB |
Resolution |
0.1dB |
|
|
Accuracy |
±1dB |
Accuracy |
±1dB |
|
|
Maximum pulse per cycle |
1400 |
Frequency range |
20kHz～500kHz |
|
|
Measurement frequency band |
1 ~ 100MHz |
Unit conversion |
DBμV / μV / mV |
|
|
Non-contact ultrasonic parameters |
UHF parameters |
|||
|
Measurement range |
- 10 dBμV～80 dBμV |
Detection frequency band |
300MHz～3000MHz |
|
|
Resolution |
0.1dB |
Measurement range |
-80～-10dBm |
|
|
Accuracy |
±1dB |
Unit conversion |
DB / dBm / mV |
|
|
Sensor center frequency |
40 kHz ± 2 kHz |
|
|
|
|
Unit conversion |
DBμV / μV / mV |
|
|
|
|
High-frequency transformer parameters |
Focusing parameters |
|||
|
Sensor transmission impedance |
9.9mV/mA |
Measurement range |
- 10 dBμV～80 dBμV |
|
|
Detection frequency |
0.5~50MHz (customizable) |
Measuring distance |
0m～100m |
|
|
Sensitivity |
1mV |
Center frequency |
40 kHz ± 2 kHz |
|
|
Unit conversion |
DBmV / mV / dBm |
Unit conversion |
DBμV / μV / mV |
|
|
Acoustic parameters |
High-end infrared thermal imager |
|||
|
Frequency range |
0 to 48kHz |
Resolution |
384×288 |
|
|
Measuring distance |
0.3 ~ 50m |
Temperature measurement range |
-20℃ to 400℃ |
|
|
Number of microphones |
64 to 128 |
Temperature measurement accuracy |
± 2 ℃ |
|
|
Camera field of view |
58°* 27° |
|
|
|
|
Hardware |
||||
|
Shell |
ABS |
|||
|
Main unit size |
248*165*55 (Length*Width*Thickness, mm) |
|||
|
Show |
7-inch capacitive touchscreen, 1280*800 resolution |
|||
|
Sampling accuracy |
12bit |
|||
|
Synchronization method |
Internal synchronization, external synchronization |
|||
|
Connector |
USB External sensor input interface (also serves as charger input ) |
Wi-Fi, Ethernet port, Bluetooth |
||
|
SD card |
Standard configuration: 128GB to 256GB |
|||
|
Built-in battery |
12.6V/5000mAh lithium battery |
|||
|
Working hours |
Approximately 7 hours |
|||
|
Image format |
JPG |
|||
|
Video format |
MP4 |
|||
|
Video length |
Depends on memory capacity |
|||
|
Charger |
100～240VAC, 50/60Hz |
|||
|
Operating temperature |
-30 ℃ ～50℃ |
|||
|
Humidity |
≤60% |
|||
|
Volume and weight |
1.3kg |
|||
Features of Handheld Ultrasonic PD Detector
High-Sensitivity Detection
Equipped with a precision ultrasonic sensor capable of detecting weak partial discharge signals before they develop into serious insulation failures.
Real-Time Monitoring
Provides real-time measurement and display of ultrasonic signal intensity, enabling users to assess equipment condition instantly.
Acoustic Analysis
Converts ultrasonic signals into audible sounds through headphones, allowing operators to distinguish different discharge patterns such as corona, surface discharge, and arcing.
Fault Localization
Directional sensing technology helps accurately locate the source of partial discharge, reducing inspection time and maintenance costs.
Data Storage and Reporting
Supports internal data storage, historical trend analysis, and data export for maintenance records and professional reporting.
Portable and User-Friendly Design
Lightweight and ergonomically designed for field inspections, making it suitable for both indoor and outdoor applications.
Corona Discharge
Occurs when electric field stress exceeds the ionization threshold of the surrounding air, commonly found around conductors and connectors.
Surface Discharge
Develops along the surface of insulating materials due to contamination, moisture, or insulation degradation.
Internal Discharge
Occurs within insulation voids, cracks, or defects and is often an indicator of serious insulation deterioration.
Floating Potential Discharge
Generated by ungrounded metallic components exposed to electric fields.
Arcing Discharge
A severe form of discharge that can lead to equipment failure if not addressed promptly.
Applications of Handheld Ultrasonic PD Detector
Power Utilities and Substations
Power utilities use handheld ultrasonic PD detectors to inspect switchgear, transformers, circuit breakers, and substations. Early detection of partial discharge helps prevent equipment failures, reduce outages, and improve power system reliability.
Electrical Equipment Manufacturing
Manufacturers use ultrasonic PD detectors during production and testing to verify insulation quality and ensure electrical equipment meets required standards before delivery.
Industrial Facilities
Factories and industrial plants use PD detectors to monitor electrical systems, motors, generators, and switchgear. Early fault detection helps avoid unexpected downtime and costly repairs.
Renewable Energy Projects
Wind farms, solar plants, and energy storage systems use handheld PD detectors to inspect transformers, cables, and switchgear, improving system reliability and reducing maintenance risks.
Data Centers
Data centers use ultrasonic PD detectors to monitor critical power equipment, helping prevent electrical failures and ensuring continuous operation of IT infrastructure.
Oil and Gas Industry
Oil refineries, petrochemical plants, and offshore facilities use PD detectors to identify insulation problems in electrical equipment, enhancing safety and operational reliability.
Transportation Infrastructure
Railways, airports, ports, and metro systems use ultrasonic PD detectors to inspect high-voltage equipment and support preventive maintenance programs.
Commercial Buildings and Critical Facilities
Hospitals, banks, government facilities, and commercial buildings use PD detection to maintain reliable power systems and reduce the risk of electrical interruptions.
Components of a Handheld Ultrasonic PD Detector
Main Unit
The main unit serves as the control and processing center of the detector. It receives ultrasonic signals from the sensor, processes the data, displays measurement results, and stores inspection records. Most units feature a color LCD screen, intuitive user interface, and rechargeable battery.
Ultrasonic Sensor
The ultrasonic sensor is the core sensing component of the device. It detects high-frequency sound waves generated by partial discharge activity and converts them into electrical signals for analysis.
Directional Probe
The directional probe helps users accurately locate the source of partial discharge. Its focused sensing capability allows inspectors to pinpoint faults in switchgear, transformers, cable terminations, and other electrical equipment.
Headphones
Noise-isolating headphones enable operators to listen to converted ultrasonic signals in noisy environments. Different discharge types can often be distinguished by their unique sound patterns.
Data Storage and Communication Module
The built-in memory and communication interface allow users to save inspection results, transfer data to a computer, and generate maintenance reports for further analysis.
Rechargeable Battery System
A rechargeable lithium-ion battery provides portable operation and supports extended field inspections without requiring external power sources.
Working Principle Of Handheld Ultrasonic PD Detector
When insulation defects occur in high-voltage equipment, partial discharge activity generates ultrasonic waves that are typically beyond the range of human hearing.
The ultrasonic sensor captures these high-frequency acoustic signals and converts them into electrical signals.
Advanced digital signal processing technology filters background noise, amplifies discharge signals, and analyzes signal characteristics to improve detection accuracy.
Processed signals are displayed on the screen as numerical values, bar graphs, or trend data. At the same time, the detector converts ultrasonic signals into audible sounds that can be monitored through headphones.
By evaluating signal intensity, frequency characteristics, and discharge patterns, operators can identify potential insulation defects and determine the location of the fault source.
Installation of Handheld Ultrasonic PD Detector
Initial Inspection
Before use, inspect the detector, sensor, cables, and accessories to ensure all components are in good condition and functioning properly.
01
Battery Charging
Fully charge the battery before the first operation to ensure sufficient working time during inspections.
02
Sensor Connection
Connect the ultrasonic sensor or directional probe securely to the main unit according to the manufacturer's instructions.
03
System Configuration
Power on the device and configure measurement parameters such as sensitivity, gain level, and alarm thresholds based on the inspection requirements.
04
Functional Verification
Perform a self-test or verification check to confirm that the detector is operating correctly before conducting field measurements.
05
Certificates
FAQ
As one of the most professional ultrasonic partial discharge tester manufacturers in China, we're featured by quality products and good price. Please rest assured to buy high quality ultrasonic partial discharge tester in stock here and get quotation from our factory. Customized orders are welcome.
Partial Discharge Tester For High Voltage Switchgear, Transformer Partial Discharge Tester, Handheld Ultrasonic PD Detector
