Handheld Partial Discharge Tester
The HB ZHIWEI ZWPD92 is an Android-based handheld diagnostic instrument engineered to detect, locate, and analyze partial discharge (PD) in MV/HV assets, including transformers, GIS, switchgear, and power cables.
Weighing only 0.85 kg, it integrates Ultrasonic (US), High Frequency Current Transformer (HFCT), TEV, and UHF sensor technologies.
Designed for non-invasive, live-line testing per IEC 60270 standards, the ZWPD92 enables comprehensive insulation condition assessment without equipment shutdown.
Product Overview
The ZWPD92 Handheld Partial Discharge Tester is built for modern substation maintenance. Utilizing an integrated Android OS, it seamlessly merges acoustic and electrical detection technologies without requiring any equipment shutdowns.
Featuring a built-in 5-megapixel camera for site recording and RFID/Bluetooth capabilities, it offers a smart, all-in-one solution for evaluating insulation defects early and accurately.
Functions and Value:
1. Integrated Multi-Sensor Capability: Configured with 4 detection channels: TEV (3MHz–100MHz), airborne/contact Ultrasonic (20kHz–300kHz), wireless UHF (300MHz–1.5GHz), and wireless HFCT (100kHz–50MHz) for full asset diagnostic coverage.
2. Comprehensive Spectrum Diagnostics: Features Time-Domain Waveform, PRPD, PRPS, and PulseMode graphs with 50Hz/100Hz phase correlation analysis to separate true insulation discharge signals from background electrical noise.
3. Flexible Phase Synchronization: Supports internal, optical, and wireless external reference synchronization (via power supply transmitter) to maintain stable, accurate 0°–360° phase resolution under variable substation conditions.
4. Non-Invasive Live Operation: Uses clamp-on HFCT sensors on grounding conductors, magnetic contact US sensors on tank enclosures, and surface-contact TEV sensors with zero interruption to running power assets.
5. Field-Ready Hardware Design: Weighs only 0.85 kg and runs on a built-in 7.4V / 4800mAh lithium battery providing over 7 hours of continuous operation; includes a 3.5 mm audio jack for real-time acoustic signal listening.
6. Data Management & PC Reporting: Provides USB Type-C data export, Bluetooth communication, and Micro SD (TF) card storage, paired with specialized PC software for automated inspection report generation.
Technical Details
| Parameter | Specification |
|---|---|
| Model | ZWPD92 |
| Channel Capacity | 4 Interfaces: 1 × TEV, 1 × US, 1 × UHF (Wireless), 1 × HFCT (Wireless) |
| A/D Sampling Accuracy | 12-bit |
| Synchronization Modes | Internal synchronization, External synchronization, Light synchronization |
| Operating System | Android OS |
| Display Screen | 5.0-inch TFT True Color LCD Touchscreen (800 × 480) |
| Control Method | Touchscreen and Physical Navigation Keys |
| Data Storage | Micro SD (TF) Card |
| Audio Interface | 3.5mm Stereo Headphone Jack |
| Data Communication | USB Type-C, Bluetooth, Wi-Fi |
| Auxiliary Functions | 5.0-Megapixel Camera (Site Logging), RFID Reader Module |
| Sensor Type | Parameter | Technical Value |
|---|---|---|
| TEV | Frequency Range | 3MHz – 100MHz |
| Measuring Range | 0 – 60dB | |
| Measurement Accuracy | ±2dB | |
| Resolution | 1dB | |
| Max Pulses Per Cycle | 720 | |
| Min Pulse Frequency | 10Hz | |
| Connector | Standard SMA (Direct connection to host) | |
| Non-Contact US | Center Frequency | 40kHz |
| Measuring Range | 0.5μV – 1mV | |
| Resolution / Accuracy | 0.1μV / ±0.1μV | |
| Connector | Standard SMA (Direct connection to host) | |
| Contact US | Frequency Range | 20kHz – 300kHz |
| Measuring Range | 0.1mV – 1V | |
| Sensitivity / Impedance | 0.1mV / 50Ω | |
| Connector | Standard SMA (Direct connection to host) |
| Sensor Type - Optional | Parameter | Technical Value |
|---|---|---|
| UHF (Optional) | Frequency Range | 300MHz – 1.5GHz |
| Sensitivity | < -60dBm | |
| Receiving method | The antenna | |
| Transfer method | Coaxial cable | |
| Output method | BNC interface - signal conditioning unit, wireless connection to the host | |
| HFCT (Optional) | Frequency Range | 100kHz – 50MHz |
| Transfer impedance | >5mV/mA(10MHz ) | |
| Transfer impedance | 50Ω | |
| Measuring range | -20~80dB | |
| Measurement error | ±1dB | |
| Resolution | 1dB | |
| Output interface | BNC Interface - signal conditioning unit,Wireless connection host |
| Parameter | Specification |
|---|---|
| Internal Battery | Rechargeable Lithium-ion Battery (7.4V / 4800mAh) |
| Operating Time | ≥ 7 Hours Continuous Operation |
| Charging Time | Approx. 3 – 4 Hours (DC 12V / 2A Charger) |
| External Power Adapter | Input: AC 100–240V; Output: DC 12V / 2A |
| Dimensions | 180 × 110 × 40 mm |
| Net Weight | 0.85 kg |
| Operating Temperature | -20°C to +50°C |
| Storage Temperature | -40°C to +70°C |
| Relative Humidity | 10% – 90% (Non-condensing) |
| Operating Altitude | ≤ 3000 m |
Model Selection Guide
| Feature | ZW5320 | ZW8320 |
|---|---|---|
| Max Output Current | 20A | 20A |
| Max Resistance Range | Up to 200Ω | Up to 25kΩ (Includes 10mA, <1mA steps) |
| 3-Phase Auto Test | Supported | Supported |
| Auto Degaussing | Supported | Supported |
| Magnetic Assist | Not available | Supported |
| Best Application | Standard distribution & medium power transformers. | Large power transformers requiring rapid LV winding tests. |
Recent Work
Parts List
| Item NO. | Max Current | Measuring Range | Main Features | Recommended Application |
|---|---|---|---|---|
| GDZR-10A | 10A | 100μΩ - 20KΩ | Portable, built-in discharge alarm | Small to medium distribution transformers |
| GDZR-20A | 20A | 10μΩ - 10KΩ | High-speed testing, heat dissipation | Medium-sized power transformers |
| GDZR-40A | 40A | 1μΩ - 2KΩ | Dual-channel measurement, high current | Large-scale power transformers |
| GDZR-40A | Three-Phase 10A | 100μΩ - 10KΩ | Three-phase simultaneous measurement | Yn-type transformers, time-saving |
Product Video
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Certificate
Frequently Asked Questions
Contact our engineers for technical support and application guidance.
For standard metal-clad switchgear, a combination of TEV (Transient Earth Voltage) and Ultrasonic (US) sensors is highly recommended. TEV detects internal electromagnetic emissions on the metal casing, while US detects acoustic signals from surface or gap discharges.
No. The ZWPD92 is a completely non-invasive, live-testing device. Sensors are placed on the exterior metal casing of the equipment or clamped over grounding cables (using HFCT), allowing you to perform safe inspections without interrupting the power supply.
PRPD (Phase Resolved Partial Discharge) is a 2D map showing the relationship between discharge amplitude and power frequency phase. PRPS (Phase Resolved Pulse Sequence) is a 3D visualization adding the “time” axis. Both modes are critical for distinguishing true PD from environmental noise and identifying the exact type of defect (e.g., corona, particle, or void discharge).
The device stores testing data, extreme values, and even site photos via its built-in Android system. You can easily export this database using the included Type-C USB cable to our dedicated PC software, which automatically edits and generates detailed inspection reports.
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