PD3000 Partial Discharge Monitor

PD3000 Partial Discharge Monitor provides continuous monitors of partial discharge (PD) in equipment such as transformers, cables in switchgear and rotating machines, etc. You can call this monitor partial discharge monitoring switchgear too.

It analyzes RF emissions in the HF, VHF, and lower UHF ranges by sensors outside the cabinet. HMI unit provides site display of TEV amplitude and ultrasonic amplitude. DO port can drive local alarms and multi-level alarm notice site engineer. The partial discharge monitor also can communicate data and notifications across standard RS485 Modbus interface to networked supervisory systems.

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  • Rugged, compact design sensor detects TEV and audible ultrasonic.
  • Non-intrusive and wall-mounted unit design, magnetic adsorption easy installation.
  • Panel mount HMI unit provides automatic PD data acquisition and analysis.
  • HMI supports max 96pcs sensor, optional wireless, and wired(RS485) connection.
  • Multiple configurable alarms, provide 2*DO NC & NO contact for external alarm trig.
  • RS 485 MODBUS-RTU easy integration into existing SCADA systems.


  • Power transformers
  • Rotating machines
  • AIS/ GIS Switchgears
  • Cables and their accessories
  • HV AC testing (Resonant test set, VLF, OWTS)
  • Multiple point PD monitoring




HMI electrical parameters of PD monitoring for switchgear:

Auxiliary Power 85-265Vac/dc
20-60Vdc Optional
Power consumption <6W
Communication RS-485, MODBUS-RTU
Digital output 2* NC & NO, passive node
Enviorment temperature -10 ~ +60°C
Enviorment humidity RH 20% ~ 95% (No condensation)
Dimensions (L × W × H) 144*144*100mm
Open install hole 138*138mm

Remote sensor common:

Power supply 12Vdc or 2000mAh build in battery*
Wireless band* 433Mhz ~2.4Ghz optional
Signal transmission distance Up to 80m (260 feet)
Static power consumption <10mW
Installation method 4* strong magnet, wall mount

TEV sensor:

Detect range 0~60 dBmV
HF Frequency Response 3~100MHz
Resolution / Accuracy 1dBmV / ±1dBmV

Ultrasound sensor:

Detect range -7dBμV ~ 68dBμV
Resolution / Accuracy 1dB / ±1dB
Sensitivity -65 dB (0 dB=1 volt/μbar rms SPL)
Sensor Center Frequency 40 kHz