In modern power systems, partial discharge (PD) is widely recognized as an early warning signal of insulation deterioration and potential failures in high-voltage equipment. Timely detection of PD not only prevents unexpected outages but also helps reduce maintenance costs.
With the growing demand for digitalized and intelligent grid management, the portable partial discharge detector has become an essential tool for field engineers. Its lightweight design, multi-sensor integration, and intelligent analysis functions make it suitable for a wide range of electrical assets.
Multi-Sensor Integration for Comprehensive Detection
The portable PD detector combines five types of sensors, making it highly versatile across different applications:
- Transient Earth Voltage (TEV) sensor – Ideal for detecting PD in switchgear and ring main units.
- Airborne ultrasonic sensor – Effective for identifying corona and surface discharge in switchgear, RMUs, and overhead lines.
- Contact ultrasonic sensor – Designed for GIS and transformers to capture localized acoustic signals.
- High-frequency current transformer (HFCT) – Monitors cable and transformer discharge activity.
- Ultra-high frequency (UHF) sensor – Suitable for GIS and transformers under complex electromagnetic environments.
This multi-technology approach ensures that operators can detect various PD sources with high sensitivity and reliability.
Intelligent Diagnostics and Data Connectivity
Unlike traditional instruments, the portable partial discharge detector is equipped with advanced analysis and communication features:
- Automated diagnosis – Built-in discharge patterns and PRPD/PRPS mapping enable accurate discharge type recognition.
- Waveform and spectrum storage – Time-domain signals and PRPD charts can be saved for future review and comparison.
- Acoustic monitoring – Stereo listening with noise reduction provides clear detection of discharge activity, with audio playback supported.
- Seamless data integration – USB, Wi-Fi, Bluetooth, and NFC interfaces allow smooth connection with power utility PMS platforms for report generation and work order management.
These capabilities significantly improve efficiency in condition monitoring and fault prevention.
Lightweight Design for Field Operations
Field engineers value portability and convenience. The device is designed with:
- 5-inch 800×480 touchscreen for intuitive operation.
- Embedded Linux system ensuring stable performance.
- 16 GB internal storage for large amounts of test data.
- Over 8 hours of battery life for daily inspection tasks.
- Compact size and lightweight design, reducing the burden during fieldwork.
Application Value in Smart Grid Development
From routine inspections and commissioning tests to fault localization, the portable partial discharge detector plays a vital role in ensuring equipment safety. By identifying insulation issues at an early stage, it helps power companies improve reliability, reduce downtime, and extend asset life cycles.
As the energy sector accelerates toward digitalization and smart grid deployment, portable PD detectors will continue to provide strong technical support for asset management and predictive maintenance.