XD50WO Series On-line PD Monitoring & Positioning System for Power Systems

XD50WO Series On-line PD Monitoring & Positioning System for Power Systems

The system integrates multiple partial discharge (PD) detection methods to preform long-term monitoring of the insulation conditions of power systems.

Complying Standards:

•  DL/T* 1430-2015 Technical guide for on-line monitoring system of transformation equipment.

•  DL/T 1432.1-2015 Testing specification for on-line monitoring device of transformation equipment – Part 1: General testing specification.

•  DL/T 860-2004 Communication networks and systems for substations.

•  Q/GDW* 535-2010 General technical specifications for on-line monitoring devices of transformation equipment.

•  Q/GDW 534-2010 Technical guide for on-line monitoring systems of transformation equipment.

•  *DL/T stands for “Recommended standards of electric power industry of China”.

•  *Q/GDW stands for “Corporation standard of State Grid Corporation of China”.


•  Highly accurate:Accurately captures valid PD signals through AE, TEV, HF and UHF.Signals from different sources are synchronized and can be cross validated with each other.
•  Highly reliable:High-reliability design results in very low failure rate.No freezing or data lost after flashover accident.
•  Continuous monitoring:Continuously monitoring the PD activities for long periods.
•  Robust to interference:Complete suite of interference reducing technologies: Spectrum analysis, frequency-selective filtering, interference separation, and comprehensive shielding.
•  Accurate localization:Supports highly accurate electric, acoustic, and electric-acoustic localization of discharges.
•  Intelligent diagnosis:Discharge types and threat levels can be automatically identified, with reference to historical data.
•  Failure alarm:Failure thresholds can be set so that failure alarms can be sent to terminals and smartphone APPs.
•  Automated testing:Fully automated testing process.Captures discharge characteristics and locations of key-events from partial discharges to flashover.
•  AE-UHF joint detection:Synchronized UHF and AE PD detection.Revolutionary performance improvement in the orders of magnitude compared with AE method alone.
•  Industry-leading sensitivity:Sensitivity equal to or better than 0.1pC.
•  High compatibility:Supports both built-in sensors and third-party devices.
•  Weatherproof:All devices are IP65 rated.

Technical Specifications:

•  Sensitivity:                                           0.1pC;

•  Measuring frequency band:                  UHF: 300 ~ 1500MHz, AE: 20 ~ 200kHz, HF: 3~30MHz, TEV: 3~100MHz;

•  Data storage:                                        Log interval: 1~30min; Number of entries: 1 ~ 100; Storage time: ≥ 1 year;

•  Phase synchronization:                        Frequency: 30 ~ 300Hz; Voltage: AC10 ~ 380; Accuracy: 0.01°;

•  Timing synchronization error:               50ns;

•  Weatherproof:                                       IP65;

•  Connectivity:                                         3G/4G cellular network, Fiber optics; Complies to DL/T 860 (IEC61850);

•  Power supply:                                       Grid power (removable lithium-ion battery as backup).

Product Models:

Model Name Units Channels Comment

Power Systems On-line PD

Detection & Localization System

2 AE UHF TEV HF Units can be added as needed.
4 4 2 2



Testing unit (attachable)

Testing unit (rack mount)

Monitoring unit attached to the device

Attachable sensor installed on GIS

On-site testing and analysis

Remote control terminal

Smartphone APP

Software UI

    Product Category