Multi-Channel Partial Discharge Diagnosis System

Model: HMJ9041

Product Overview

The Multi-Channel Partial Discharge (PD) Diagnosis System enables real-time, continuous live monitoring of the insulation condition inside operating electrical equipment. It employs detection principles such as Transient Earth Voltage (TEV), airborne ultrasonic, contact ultrasonic, Ultra High Frequency (UHF), and High Frequency Current (HFC) to help users eliminate potential faults before insulation failures occur. The system performs high-speed sampling of PD signals to capture complete time-domain waveforms.

Its proprietary pulse separation technology effectively filters out on-site noise during online detection. The expert database identification system incorporates signal classification algorithms including the minimum distance method, artificial neural networks with support vector machines, fuzzy logic, and statistical algorithms to identify various types of PD signals within electrical equipment. This allows for accurate diagnosis of insulation fault types and severity, providing users with valuable maintenance and repair insights.

Key Features

1. Integrates sensors for TEV, airborne ultrasonic, contact ultrasonic, HFC, and UHF detection.
2. Four channels simultaneously detect signal frequency and intensity, enhancing detection efficiency.
3. Each channel supports over-limit alarms with red, yellow, and green indicators to show the severity of PD.
4. Supports PRPS and PRPD spectrum analysis to identify discharge types.
5. Features time-domain waveform detection mode to recognize typical PD waveforms and effectively distinguish interference signals.
6. Equipped with unique background noise extraction and pulse threshold reconstruction for more accurate pulse extraction.
7. Discharge location pinpointing based on time difference and pulse statistics, with a positioning accuracy of 0.15 meters.
8. Multiple analysis algorithms provide comprehensive monitoring data analysis and automatic report generation.

Main Specifications

• Channels: 4
• Detection Bandwidth: 0–250 MHz
• Sampling Resolution: 12-bit
• Input Range: 0.1 mV–5 Vpp
• Input Impedance: 50Ω (high impedance optional)
• Interface: BNC
• Battery Life: ≥6 hours
• Synchronization Channel
• Input Voltage: 0.5–100 Vrms
• Frequency Range: 0.1–1000 Hz
• Phase Accuracy: 0.1°
• Spectrum Display: PRPD and PRPS maps
• Weight: <3.5 kg