PD-MAT400A is a permanently mounted on-line Partial Discharge (PD) diagnostic system. This test device focuses on detecting and analyzing the generation of PD in equipment such as transformers, HV GIS circuit breakers, GIS ductwork, and CGIS using acoustic emission detection. The ability to link up to 32 units using an RS-422 allows the user a greater degree of protection for critical substation equipment. Each unit uses four Acoustic Emission (AE) sensors. This unit provides advanced warning of potential failures.

(NOTE: All PowerPD units include software, which allows accessibility of continuous monitoring from your home or office PC, via, remote Internet)


  • Provides pro-active decision making though continuously monitoring and detecting abnormal conditions in high voltage equipment
  • Reduced maintenance expenses by avoiding costly damage to equipment
  • Provides early warning of possible failure and lost of revenue from an unexpected outage
  • Risk management of previously undetected faults

Screen Shots
2D Data 3D Data
Display of Partial Discharge Detection
System Configuration
  • 4 Channels (4 of Acoustic Emission Sensor; R15I (100 - 300KHz))
  • Daisy chain up 32 units
  • One month internal memory
  • Power
      110~240V 50/60Hz
  • Communication; MODBUS protocol
      - RS-485
          Baud Rate: 19200 bps
          Length: 1.2Km
          Daisy Chain: 32 units
      - Modem: (Option: Wireless modem)
          Baud Rate: 1200bps
      - RS-232
          Baud Rate: 19600 bps
          Length: 12m
  • Alarm (output: Dry Contact)
  • Data analysis
      - Partial Discharge counts in bursts are captured (Envelop)
      - Programmable alarm option allows Threshold & Envelop Alarms
      - Signal Pulse vs. Phase are displayed and measured
      - Amplitude of Fault vs. Phase are measured
      - Automatic Noise level detection.
  • Data Management
      - One month of data storage capability
      - Simple display and management of daily, monthly and yearly data
      - Ability to Trend and Forecast a known fault
      - Phase vs. time; Pulse vs. Phase; Pulse vs. Amplitude
      - 2D and 3D graphic display for ease of diagnosis
      - User settings are possible for data collection
  • System Operations
      - Windows NT/2000/XP Environment

Partial Discharge counts are displayed in Bursts (see graphic)
Programmable alarm option allows the user to set Threshold & Envelop Alarms

Applicable Targets: Transformer, GIS, Circuit Breakers and CGIS.

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