EN
PDM-319 Handheld Multi-Method Partial Discharge Detector
PDM-319 Digital Intelligent Portable Multi-Method Partial Discharge Detector with UHF, Ultrasonic and HFCT Detection, PRPD Pattern Display, Live Test Capability, for HV Equipment On-Site Inspection, Fault Location and Insulation Condition Assessment.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
PDM-319 is a professional portable multi-method partial discharge detector designed for live inspection, fault location and insulation condition evaluation of medium and high voltage electrical equipment in substations, industrial power distribution rooms, power plants and third-party testing institutions. It strictly complies with IEC 60270, GB/T 7354-2003 and DL/T 1432.1-2016 standards, integrating three mainstream detection technologies: ultra-high frequency (UHF), ultrasonic (AE) and high frequency current transformer (HFCT), which can flexibly adapt to different equipment types and on-site environments, realizing non-power-off live detection of partial discharge defects.
The instrument adopts high-speed synchronous acquisition architecture with 12-bit ADC resolution, achieving 1pC detection sensitivity for pulse current method and -6dBμV ultra-high sensitivity for UHF method. It supports internal power frequency synchronization and external voltage synchronization, accurately generates PRPD phase distribution patterns, and realizes qualitative identification of typical discharge defects such as corona, floating potential, air gap discharge and surface discharge. The 7-inch high-brightness capacitive touch screen supports multiple display modes including waveform, spectrum, PRPD and trend, with intuitive data presentation. It is equipped with various dedicated sensors, which can be applied to GIS, switchgear, power transformers, power cables, busbars and other equipment.
Specifications
| Parameter | Specification |
|---|---|
| Compliance Standards | IEC 60270, GB/T 7354-2003, DL/T 1432.1-2016, DL/T 1630-2016, DL/T 596-2021 |
| Detection Methods | UHF method + Ultrasonic method + HFCT method (three-channel synchronous acquisition) |
| UHF Detection Channel | |
| Frequency Band | 300MHz ~ 1500MHz |
| Measurement Range | -6dBμV ~ 68dBμV |
| Accuracy | ±1dB |
| Resolution | 0.1dB |
| Ultrasonic Detection Channel | |
| Frequency Band | 20kHz ~ 200kHz |
| Center Frequency | 40kHz |
| Peak Sensitivity | > 70dB |
| Measurement Mode | Contact type / non-contact type |
| HFCT Detection Channel | |
| Frequency Band | 1MHz ~ 100MHz |
| Minimum Detection Limit | 1pC |
| Transfer Impedance | > 10mV/mA |
| Measurement Range | 1pC ~ 10000pC |
| Synchronization Modes | Internal power frequency sync / External AC voltage sync (10V ~ 380V) |
| Sampling Parameters | 12-bit ADC resolution, multi-channel synchronous sampling |
| Analysis Functions | PRPD pattern, PRPS pattern, time-domain waveform, spectrum analysis, trend recording, defect auxiliary identification |
| Display & Operation | 7-inch 800×480 high-brightness capacitive touch screen, Chinese/English bilingual |
| Data Storage | 16GB built-in memory, microSD expandable up to 128GB |
| Communication Interface | USB 2.0 (U-disk export + PC communication), optional Wi-Fi / Bluetooth |
| Power Supply | Built-in 7.4V rechargeable lithium battery; AC 100V~240V adapter |
| Battery Life | ≥ 8 hours continuous working |
| Protection Grade | IP65 (host) |
| Operating Temperature | -20℃ ~ +60℃ |
| Ambient Humidity | 20% ~ 85% RH (non-condensing) |
| Host Dimensions | 260 × 150 × 65mm |
| Host Weight | ~ 1.2kg (including battery) |
| Enclosure | Handheld industrial engineering plastic enclosure with shockproof rubber |
Applications
Core Test Objects
- Gas insulated switchgear (GIS): Internal insulation defect detection, live patrol inspection, fault location
- Medium and high voltage switchgear: Cabinet internal discharge detection, busbar, circuit breaker, contact box insulation state evaluation
- Power transformers: Winding and internal insulation partial discharge detection, oil-paper insulation state evaluation
- Power cables & accessories: Cable body, intermediate joint, terminal partial discharge detection, insulation defect diagnosis
- Other equipment: Current/voltage transformers, surge arresters, busbars, insulators and other high-voltage equipment
Typical Usage Scenarios
- Power operation and maintenance departments: Substation equipment live patrol inspection, preventive test, insulation state evaluation and fault diagnosis
- Industrial enterprises: Factory distribution system regular inspection, electrical equipment maintenance, fault troubleshooting
- Third-party testing institutions: Power equipment live detection service, insulation performance test, engineering acceptance
- Power engineering companies: Equipment handover test, commissioning test, after-sales fault diagnosis
- Railway & petrochemical: Special industry high-voltage equipment regular inspection, safety assessment
Advantages
Three Detection Methods Integrated
UHF + ultrasonic + HFCT complementary advantages, cross-verification → adapts to various equipment types, effectively eliminates interference, reduces misjudgment rate
High-Sensitivity Phase-Resolved Analysis
PRPD pattern + typical defect library → quantitative measurement + qualitative identification, accurate evaluation of discharge type and severity
Live Detection Non-Power Outage
Non-contact/non-intrusive detection, no need for power outage → does not affect normal production and operation, improves detection efficiency and equipment availability
Industrial-Grade Durable Design
IP65 protection, 8h long battery life, lightweight handheld → suitable for all-day on-site mobile patrol, adapts to harsh working environments
Efficient Data Management & Report
Mass storage, trend analysis, one-click standard report → convenient data archiving and post-analysis, improves work standardization
High Cost Performance Patrol Solution
Complete functions, stable performance, simple operation → ideal for power operation and maintenance teams for daily live patrol and batch configuration
FAQ
Q: What are the advantages of multi-method PD detection compared with single method?
A: Different PD detection methods have different applicable scenarios and limitations: UHF method has high sensitivity for internal discharge of sealed equipment, but is susceptible to spatial electromagnetic interference; ultrasonic method is suitable for surface discharge detection, with strong anti-electromagnetic interference ability, but cannot detect internal deep discharge; HFCT method can quantitatively measure discharge magnitude, but needs to be connected to the grounding wire. The three methods complement each other and cross-verify, which can effectively eliminate environmental interference, greatly reduce misjudgment rate, and adapt to more complex on-site environments and equipment types.
Q: Can PDM-319 perform live detection without power outage?
A: Yes. PDM-319 is specially designed for live detection. UHF method and ultrasonic method are non-contact and non-intrusive detection, which do not need to be electrically connected to the equipment under test, and can complete detection during normal operation of the equipment. HFCT method only needs to be sleeved on the equipment grounding wire, which will not affect the normal operation of the equipment. Live detection does not require power outage, which greatly improves detection efficiency and avoids economic losses caused by power outage.
Q: Can it identify the type of partial discharge defect?
A: Yes. PDM-319 has built-in typical PD defect fingerprint database, which can generate PRPD phase distribution pattern in real time. Combined with discharge phase characteristics, amplitude distribution and repetition rate, it can assist in identifying typical discharge types such as corona discharge, floating potential discharge, internal air gap discharge and surface discharge, and provide reference for equipment insulation state evaluation and maintenance decision.
