LQPDM2025 Partial Discharge Measurement System

The LQPDM2025 represents the pinnacle of digital partial discharge analysis, combining six measurement functions in one compact unit with intelligent interference recognition for reliable field diagnostics.

Standards Compliance

Key Features

Measurement Capabilities

• Single-channel multi-function (equivalent to 6 conventional PD testers)

• Discharge pulse waveform analysis (time/frequency domain)

• Real-time 2D/3D PRPD pattern display

Advanced Functions

• Intelligent interference recognition system

• Correlation filtering for noise suppression

• Automatic/manual data recording

Technical Specifications

Measurement Parameters

• Calibration Range: 5pC-5000pC (8 selectable ranges)

• Synchronization: Internal/external with phase identification

• Display Modes: Ellipse, line, sine wave formats

Data Management

Typical Discharge Pattern Recognition

Internal Bubble Discharge Characteristics

1. Discharges occur in 0°-90° and 180°-270° phase ranges

2. Initial discharge near peak voltage (Un)

3. Amplitude ratio < 3:1 between half-cycles

4. Waveform remains stable over time

5. Discharge rate increases with voltage

Critical Indicator: Sudden amplitude increase (100×) suggests oil-immersed capacitor bubbles

Application Scenarios

Power Transformers

• Winding turn-to-turn discharges

• Oil-paper interface tracking

HV Cables

• Joint partial discharge

• Water tree degradation

GIS Systems

• Floating component discharges

• Particle-induced corona

System Configuration

• Base Unit: Digital PD analyzer with touchscreen

• Accessories:

• Calibrator (5pC-5nC)

• Test impedance adapters

• Optical synchronization kit

• Software: PDMS 2025 analysis suite with:

• Automatic defect classification

• Trend analysis tools