Partial Discharge Testing Equipment

Partial Discharge Testing Equipment (3)

Wednesday, 11 January 2017 06:25 Written by


This is an ‘All in One’ solution for testing and analysing partial discharges in the insulation of high-voltage transformers, cables, GIS and electric machines. The DIMRUS ‘PD Analyser’ help diagnose their insulation state and find any type of defects very effectively.It can be used for temporary or constant monitoring of partial discharge in medium and high voltage systems and cables of any rated voltage.The PD Analyser is the most useful device for condition estimation of high-voltage insulation. This multipurpose device is designed for -

  • Partial discharge measuring in high-voltage insulation at a high noise level.
  • Fast detecting of the defects in different high-voltage equipment and identifying how dangerous they are.


  • It separates stray noise pulses and partial discharge pulses while comparing their frequency and time of arrival.
  • It uses phase resolved partial discharge (PRPD) and time frequency analysis (PD- Cloud).
  • It has the database of the most defects which can be upgraded with new diagnostic information.
  • Danger level shows how severe the signal can be.
  • It uses special algorithms to estimate if the received data is authentic.
  • Automatic report generation on the condition of the insulation of the high-voltage equipment.


Parameters PD Analyser 3 PD-Analyzer HF/UHF
Sensor options HF, UHF HF, TEV, UHF
HF discharge pulse frequency 0.1 to 20 MHz
UHF discharge pulse frequency 200- 1500MHz
HF discharge amplitude 20 to 100000pC
UHF discharge amplitude -70dBm to -25dBm
Computer connection USB, Wi-Fi USB
Supply voltage 90 to 260V AC
Operating temperature range  -10 to 50
Dimension 222 x 160 x 45 mm 520 x 435 x 230 mm
Weight 12 Kg 25Kg


Wednesday, 11 January 2017 05:49 Written by


PD Defect Location in High-Voltage Equipment Insulation by Acoustic Sensors To act on deteriorating insulation the source of PD must be known.The insulation defects produce partial discharges, which emits electrical impulses, radiation of electromagnetic waves as well as acoustic signals.The AR700 measures acoustic signals with multiple sensors spread over the transformer. Then the software determines the failure location using the time difference of all incoming signals. Finally, these coordinates are shown in a 3D model of the transformer. AR700 device is used for measuring of acoustic signals on the external surfaces of gas-insulated breakers and substations, power transformers and other tank high-voltage equipment. The acoustic signals are caused by partial discharges in the insulation, which is the sigh of the defects.The advantage of “AR700” device is the quick installation of the acoustic PD sensors on the external surface of high-voltage equipment tank. The sensors have magnetic holder that is why there is no need to de-energize the equipment for the sensors installation. “AR700” device has 4 syn-chronic channels for acoustic signal measurement. This gives the possibility not only to find the defects in the insulation, but also to locate them. The location function of the “AR700”device is unique for acoustic devices.



  • The signal analyses and the PD zone location could be carried out both in manual and automatic modes.
  • Software calculates the fault location based on the time difference between the incoming signals.And report is generated about PD source location.
  • Convenient and handy through light weight, small size and battery operation.
  • Can be used for multiple assets like Transformers, CTs, GIS, Cables etc.
  • Defect type identification by synchronised measurement of PD


Parameter AR700
Acoustic channels for PD measuring 
Frequency range of acoustic sensors 30 - 300 kHz
High-frequency channels for PD measuring 1
Frequency range of high-frequency sensors 0.1 - 20 MHz
LCD resolution  480x272pixel
PC connection USB
Operating temperature range -20 to +60 ºc 
Humidity <98%, noncondensing 
Operating time from build-in accumulator 8 hours
Device weight, without sensors 1.1 kg
Dimensions of transportation case 520x435x230mm
Device weight in carrying case 12kg
Tuesday, 10 January 2017 10:28 Written by



The portable multipurpose 3i device (Intellectual Insulation Indicator) is for eff ective high-voltage equipment insulation monitoring on-line. The 3i device measures and analyses partial discharges (PD). For eff ective PD measurement and noise rejection, there are two types of sensors used in the device: the acoustic sensor and the TEV sensor. Both the sensors are built into the device case, and so do not need any connection cables. The device is supplied in a strong metal case; at the faceplate there are the colored screen and two buttons: power button and function button.



      The multipurpose 3i device is for on-line insulation condition estimation in the following equipment:
  • 6 - 35 kV switchgears of various designs;
  • Terminations and joints of cables;
  • High-voltage gas-insulated equipment (Gas-Insulated switchgear (GIS)) of any rated voltage.
  • The tanks of power transformers, breakers, etc.


Parameter 3i
In-built PD sensors acoustic, TEV
In-built acoustic sensor frequency range, kHz 40 ± 2
In-built TEV sensor frequency range, MHz 10 - 100
LCD resolution, pixels 240 x 320
PC connection USB
Battery life, hours 10
Operation temperature range, °C -20 ÷ 40
Device dimensions, mm 187 x 78 x 43
Weight, kg 0.6